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Expert Categories
	Energy Management
		02-Sep-10		I'm working on a prototype and need to figure out how many watts @ what voltage submersed heating element I will need to heat 1 gallon of water 62 degrees in 10-15 minutes. Thanks everyone!
		31-Aug-10		How many btu will it take to heat my camper that is 8 ft by 30 ft..and what heater is the best
		30-Aug-10		What size air conditioner by ton and seer do I need for a 1600 sq. ft walkout home?
		25-Aug-10		I have a 36inch (914mm) Reptisun UVB 10.0 tube . What will the running cost be
		18-Aug-10		I'm looking for a good comprehensive energy auditing and management software where I input all of the variables such as wall thickness and materials, inside and outside temps, square footage, internal heat loads,etc. to then calculate heat loss. But I want it to cover all areas of energy use such as lighting, HVAC, boilers, chillers, insulation, etc. In other words to do a comprehensive energy audit but where I do not have to perform the calcs by hand but I supply all of the inputs. Everything a certified energy manager would need to conduct a broad range on energy calcs. Does this exist as a single package or do I need to purchase each module individually - ie HVAC, buildings, lighting, boilers,etc. Thank you
		16-Aug-10		How many BTU's is 400 kilowatts
		14-Aug-10		I have a 10 month old 2 1/2 ton central air and heat package unit. Prior to my old unit breaking down my mobile home would get cold inside. Now on a 90 degree day my inside temp is between 80 and 85 in the coolest area of the home. When the unit was installed the freon line was punctured and repaired. Is it possible that there is a slow freon leak. The temp coming from the floor vents is approximately 64 degrees and just isn't cold enough to cool down the home. Is 64 degrees an acceptable temperature coming into the home from the vents?
		02-May-10		What type of refrigeration equipment do I need (BTU'S, Horse Power, Etc.) for a walking cooler that measures 23'x30', and 16' high? My walls and roof are made with 2"x6", with a 1/2"OSB on the outside, and 1/2" CDX plywood on the inside, the core is filled with 5 1/2" whtite polyestirene blocks; the exterior it is inside of a warehouse that has an ambient temperature of 100 degrees. None of the walls are exposed to the sun. I would like to maintain a temperature of 32 degrees. We have 3 phase (208) electrical service available Thanks in advance for the advise PMB
		18-Apr-10		what is the equivalent of 1 ton air conditioning unit in watts for 220 volts
		26-Mar-10		how many amps does a 400 watt HID light use?
		16-Feb-10		i bought 6 light fixtures i dint kno the voltage till after i purchased them, they are 277v can i use them with a regular 120v....
		No answers have been posted to this question.
		15-Feb-10		What would cause a heat pump set on 72 to run without stopping, even though the heat is displayed as being 72 degrees?
		08-Feb-10		dose an electronic balast 4 bulb fluorescent light fixture with 2 burnt out bulbs use more or less energy than the same fixture with all 4 bulbs lit?
		04-Feb-10		how many BTU furnace to heat a new 3-level home? House is 3,000 sq. ft (main 2 floors) and with a finished basement of 1200 sq. ft? They are using one unit with electronic vents. Never had one before. R they good? It's 100,000 btu's. I thought I'd need more.
		02-Feb-10		Does a stedi-power TVSS really lower your energy cost?
		28-Jan-10		Can the amperage of your main isolator exceed the amperage of your main power supply? If Yes or No why?
		28-Jan-10		whats the difference from a roof top ac and a ground ac and is the hook up close to being the same?
		27-Jan-10		what tonage ac unit should be used for a 3 level home with approximatley 3000 sq. feet
		25-Jan-10		what is the cost of running a 250 watt heat lamp for 24 hrs
		18-Jan-10		How many btu's does a black window blind emit on a sunny day? The blind is 8 ft tall by 4 ft wide. The temperarure of the metal slats in the blind is 128 degrees. My office temperature is 74 degrees.
		09-Dec-09		What would a 400 watt oil filled space heater cost me to run in San Francisco Ca per hour? thank you
		06-Dec-09		how many btus do I need to heat my 3000 square foot home with cathedral ceilings
		09-Oct-09		I have a 2000 sq ft commercial building for a workout facility and I have a 5 ton unit. I need to keep air at about 72degrees while open. How big unit do I need? Can you provide calculation as well?
		08-Oct-09		Is there a chart which shows how many watts a T8 32 watt lamp uses? also for T8 59 watt. I could use this for fixtures having from one to four lamps. I want to compare wattage versus T12 34 watt, 40 watt, 60 watt and 75 watt lamps.
		24-Sep-09		How do I figure what it would cost to operate a school cafeteria for 1 hour(277V 3ph lighting,480V 3ph A/C).
		23-Sep-09		How many BTU's are recommended to heat a one room 900 sq. foot shop.
		08-Sep-09		We have just built an apartment in our business building and require a heat source. we are seriously considering natural gas. We already have natural gas in the building. The apartment is approximately 1000 sq ft. My question is, what size natural gas heater (BTU) will I need to heat this size apartment?
		08-Sep-09		How many BTU's do we need to heat 1200 sq. ft. home with cathedral ceilings?
		29-Aug-09		Hi, How much per hour will a 100W daylight light blub rated a G energy rating cost?
		28-Aug-09		I have a two story home. The main level is about 1,000 sq ft and the upstairs is about 800 sq ft. I have dual thermostats. What would you recommend I keep each at, throughout the day, and throughout the winter/summer?
		26-Aug-09		how big an AC unit do I need for a 2400 sq ft home in upstate NY? We have a finished basement and then two other levels.
		20-Aug-09		Does it cost more to turn breakers on/off when elctricuty won't be in use for a day than to keep it on? My bill is high even though I am home very seldom. I can't unplug everything and replug in everytime have to do something or get home. I thought turning power off enough. Now i am told cut the breaker but some say it cost me more to flip on/off? What is the truth of it?
		21-Jul-09		Current AC condenser is 208V pulling a 20 amp load for about 16 hours a day? How do I calculate power and money saved by installing a new unit that pulls 15 amps?
		20-Jul-09		What is the tonage for a heat pump being installed in a 1900 sq foot home in clarksville tn
		20-Jun-09		I am a electrical contractor in the stste of califorina, and i am trying to save the owner money on his exterior lighting system. What is the proper way to install a Time Clock, Photo Cell to be operational. Here is how i have it installed circuit breaker 110 volt 20 amp, to line side of time clock, to line side of photo cell, the load side of time clock, to load side of photo cell, to contactor (same circuit)is this correct. The reason i installed it this way is because if the time clock has the wrong time on it, the lights wont turn on untill the photo cell lets it, or if the photo cell goes bad, the time clock will still turn the parking lights on.
		12-Jun-09		How much energy is used and what is the cost of that energy for a 60 Watt (incand) bulb burning 24/7 in the Daleville, Va (24083) area? Thank you al d
		08-Jun-09		On this commercial building energy savings project we have many recessed can lights where the light bulb screws in horizontally vs. vertically as in most cans (why I don't know!). Is there a fixture available that will allow us to convert these cans to down lights so we can install highly energy efficient light bulbs such as CFLs?
		22-May-09		how much does it cost to run 1300 watts for 8hrs per day 6 days per week per quater,my tarrif is 0.1459.this load will be reduced to 287watts so i want to know what im saving thanks
		06-May-09		i have to replace an 80 gallon water heater with an ecu heat recovery unit, do i need another 80 gallon tank or can i go smaller
		18-Apr-09		What BTU output would be optimal for a wood stove to heat a 450 sq. ft. geodesic dome located near Cooperstown, NY? Thank you.
		09-Apr-09		I am working on a science project with my son and I have 2 questions. My first question is, can you blow a light bulb with battery voltage from a(AAA,AA,C,9V,or D battery)? Second, will using a 10 amp rated knife switch dimenish any of the voltage when used to close the circuit?
		30-Mar-09		I have an appliucation to put a desuperheater on 2 - 210 ton 134a Mcquay A/c chillers. I would like to use one desuperheater with separate refrigerant circuits on one side and only one set of water connections. Does such an animal exist in the real world Tks Pat Miller
		11-Mar-09		What would the savings be from 1 AC unit to the next. Could you also provide the math. Thank you. Electric rate is .11 cents per KWH Current unit 15 ton unit SEER rating of 8 climate Toledo ohio We run 7 days per week 52 weeks 24 hours a day. Proposed unit is a 15 ton unit with a Seer rating of 12 with the same run time.
		14-Feb-09		sir we are using philips make sont T 400 watt sodium vapor lamps in our reaction vessel as source of photo oxidation rays. From safety point of view i need technical guidline to make the holder fitting of the bulb flame proof insted present non flameproof ordinary ceramic holder.
		13-Feb-09		HOW TO CALCULATE LOAD? TAKEN BY THE MOTOR IN A ONRMAL BELT CONVEYOR. IF MOTOR WITH 2.2KW 155RPM LENGTH OF BELT IS 3.45MTR
		06-Feb-09		How Do I Beed A new Forced hot Water zone With circulators
		10-Dec-08		I am a 30 year veterin of the building traids, living in Portland Or. What is the best rought to certification as a home energy auditer?
		03-Dec-08		what is the formula for BTU's needed per sq. foot? thanks
		23-Nov-08		HEAT Pump & Auxilary - The new programable thermostat puts the axuliary heat on when teh heat pump is reversed for defrosting the coils. Is this as efficient as having it not do this? Or is there no major energy difference?
		22-Nov-08		How do I calculate the "rated Input BTUh" to select the right propane 90+ efficient boiler for my new house? Specifics: 2" styrofoam sheathing (R10 value) and 2" spray foam insulation (R12) on the inside. In - (1.5" concrete) floor hydronic heating, adequate loop coverage in 9 separate zones. Passive solar heating house design with a lot of casement - eneglass windows on the Southern exposure. 3 occupants, two story house plus a basement that will not be used much. Square footage: 2 floors+garage = 3,400 sq.ft + 1,460 in basement - may be used as an in-law suite at some point. (Total 4,900 Sq. ft.). The Buderus GB142 boilers I am looking at use a modulator for "heating as it is needed" operation. I am trying to decide between models with 106,900 and 160,900 Rated Input BTUH. The first one at 122/86 F degrees has a Rated Output BTUH of 30,700-102,400 while the 2nd one 47,200-158,000. How do I calculate my BTU needs? would the 2nd (higher) model be an overkill and therefore less efficient? (besides more costly to buy). House is by the Atlantic coastline, North of Portland, ME. Thank you.
		14-Nov-08		How many CNG/Diesel Duel fuel engine manufacturers or conversion kit manufacturers for trucking industry. looking for a mature product not an R&D project.
		13-Nov-08		We have a 3 story house heated and cooled with 2 heat pumps. Is it more efficent to keep the temp. steady or to adjust it down at night and turn it up during the day? Thank you !
		10-Nov-08		I use propane to heat my home & want to purchase a stand-by generator for emergency power outages. My home is 3 bedroom & we have 2 refrigerators, 1 freezer which needs to stay running along with heat for the house. Thank you.
		29-Oct-08		I own a rental home and I will probably be replacing the heat and AC system. I currently have oil heat and electric AC and am thinking about replacing with a heat pump. The house is about 1000sq.ft. How much do you think this will cost. I do not want to go top of the line at this time. Thank you for your help.
		22-Oct-08		I want to purchase a generator for emergency use at my home. I have a heat pump that is on a 60A - 240V breaker. I know how to calculate (watts = Volts X Amps). I am guessing the 60A circuit is never fully loaded. Is there a general rule regarding heat pumps / furnaces that I can use to calculate what the full load is? I want to be able to run the heat pump, but want to be sure I do not overload the generator that I purchase.
		22-Oct-08		We have a small three bedroom rancher; no central air; we use an air tight woodstove in the finished basement. Our upstairs is always so hot in the summer; and in the winter it stays fairl cool. we have air vents in each gable end of the house. Is there a fan of some sort to put in the attic that would help pull the hot air up?
		22-Oct-08		I NEED TO KNOW HOW LONG IT WOULD TAKE A 240VOLT, 1 KW IMMERSION HEATER TO BOIL A 125 LITRE TANK OF DILUTE SULPHURIC ACID.
		19-Oct-08		Four 250 watt light bulbs burning for 3 hours will use how much energy?
		14-Oct-08		Can you possibly provide me with the cost savings difference between 4ft. fluorescent bulb power consumption in a 2200 sq. ft. area and a 2100 sq. ft. area in an industrial building versus using sensor motion lighing in the same square footage?
		03-Oct-08		I am currently trying to figure out baseline calculations for energy use in buildings and I was wondering if there is a general rule of thumb to estimate how many watts per square foot are used in the following building space types: Retail Rental Condo Hotel What is needed is an estimate of the amount of watts used in these spaces on an annual basis.
		03-Oct-08		I have a Therm-O-Matic Ballast, Cat. # 412-L-TC-P, imprinted on the back, E 73. I can't find any specs. on the ballast, but suspect it was manufactured in 1973, hence, it contains PCBs. Can anyone provide me with definitive specs. on the ballast containing or not containing PCBs?
		02-Oct-08		We have a 2 - 3 ton air conditioning unit cooling about 1600 sq ft and are looking to expand our sq footage to 2400. Will this system adequately cool with the additional sq footage or should we buy another unit. The current unit is only 4 years old. Thank you.
		25-Sep-08		We are looking for a 220 volt to 400 volt a/c converter or invertor that kicks out about 3000 watts. Were can i start looking.
		24-Sep-08		hey, i dont know if this is the correct catagory but i was wondering if you would be able to tell me how much it would cost to run a 25 watt fishtank heater? thanks
		23-Sep-08		In our Church building, we have two ten ton AC units in the Auditorium, and two five ton units in our fellowship hall. What size natural gas power generator would we need in the event of a power failure? Thanks, Jack
		22-Sep-08		I really am in need of a new boiler in my 120 yr old house. My system is gas fired at present. My question is simple: Buy a new gas fired boiler or is it cheaper in the long run to convert to an oil fired system?
		22-Sep-08		what air conditioning capacity do we need for a heat dissipation of 5O,OOO BTU for a room size of 100 sq feet and 10 fr in height??
		18-Sep-08		How to covert btu/hr ft2 F into its equivalent of electricity consumed in Kilo-watt hour. Thus need to know the energy efficient of a material in terms of KWh from its U-value and without using any simulation tool. reply at the earliest. thanx
		18-Sep-08		would a 3500 watt generator run 5 desktop computers?
		13-Sep-08		how many watts needed to rise 1 ton to 1 meter pls?
		28-Aug-08		How much does it cost to run a 25watt light bulb for 24 hours?
		22-Aug-08		what's the cost comparison between window air and central air?
		19-Aug-08		Is there energy consummed by ballasted fixtures if they have burnt out lamps or are left without lamps while the lighting circuit is energized?
		19-Aug-08		I have a Mr. Slim Air Conditioner/Heating Unit that is wall mounted. My electric bill is very high in the summer. How much electric do the Mr. Slim's consume?
		13-Aug-08		Do you need a different ballast to use a T8 light bulb instead of a T12?
		05-Aug-08		i want to buy a 5kva disiel generator. how many watts does it cover and what sought of appliances?
		31-Jul-08		The thermostat is located in a hallway with a bed room at the end of the hall and an office off of one end, a bath comes off of the middle of the hall way. you enter the main entrance to the hall is from the family room and the remainder of the house. I know that the thermoestat is most likely not located in the correct place. MY QUESTION I think the doors and vents to the bedroom, office, and bath room should remain open so the air conditioner will work properly, my husband thinks the bedroom should be closed off and sometime the bath. Please help.
		28-Jul-08		I have a 960 sq. ft. basement room that I want to put a zone of forced hot water. How much baseboard heat will i need. Extremely well insulated.
		24-Jul-08		How do I get to my cost per square foot in a 7,000 sq ft data center?
		24-Jul-08		how many solar panels would be necessary to run an entire hotel, with 4 floors, 40 rooms per floor, and a restaurant with a bar?
		23-Jul-08		Is there a monetary advantage to using high output baseboard? Will I see a reduction in oil usage?
		10-Jul-08		We have a commercial building with set hours of operation including lights and HVAC. We can track the minutes/hours any particular tenant turns on the lights and HVAC outside of those set hours. We need to bill those tenants for excess usage. Using the information on the electrical bill, how do I calculate the approximate charge for this excess usage. Thanks,
		06-Jul-08		I have a 3000 sq. ft. home in southern Louisiana (so the AC is used 6 months out of the year). What is the average monthly (or yearly) KWH used for this type home? Mine has always seemed usually high, even after employing many of energy-saving ideas. Could there be some other reason for high readings on the meter? Upon my request, the electric co. has checked the meter and they declare it is fine. Thanks for your help.
		18-Jun-08		how many bateries does it take to run a 400 watt light tower all day or at least 18hrs
		17-Jun-08		how much dose it cost to run a 1400 btu ac
		17-Jun-08		I am building a 2000 square metre facility consisting of 7 four bed apartments, 100 seater restaurant, bar, spa, treatment rooms, 2 swimming pools containing 300 cubic metres of water between them. A prospective utility supplier has asked me what KWh this will use. I have no idea. Can you help? RG
		16-Jun-08		I have just bought paper lampshades that say you can use a 25watt maximum bulb in them.I have 11 watt energy saving bulbs which are equivilant to 60 watt ordinary bulbs, can I use my paper lampshades or not.Thank you.
		13-Jun-08		If I take out one of two bulbs in a fixture does it save money, or just burn out the ballast faster?
		13-Jun-08		If a ballast is burned out does it still draw power.
		13-Jun-08		I am the maintaince director of a small school in western nebraska. We are looking at updating our existing hvac system which is rooftop units with hotwater heat. We currently do not have AC but will have when were done updating. We also are adding some new classrooms. Our mechanical engineer is really pushing geothermal. My question is what is the real payback vs a convetional rooftop units. Our current annual fuel cost is around 50 grand a year. It seems to me at over a million dollars more for geo its going to be a long payback?
		12-Jun-08		I would like to know if there is a heat pump that I can use as an add on to my existing Buderus oil heating system. I would like to use the heat pump to heat water for the baseboard system only, and use the boiler for the household. Any suggestions on pumps and size? The house has 4 zone setup already. How can I make this happen? CT in New Enland.
		10-Jun-08		how many btu's do I need to cool off 350 sqft and How many btu's do I need to heat and cool off 2000sqft?
		08-Jun-08		what size duct per ton/400cfm of air
		07-Jun-08		How do I determine the cost of heating my building per hour? This is a church
		06-Jun-08		Is it more cost effective to use a window air conditioner than central air.
		28-May-08		Do the KVAR power factor correcting units actually save a significant amount of energy?
		18-May-08		i have a 1,400 sg foot house and we need to replace our ac unit what size unit do we need? we have 12 vaulted celings as well?
		16-May-08		How do you determine the cost of one ton of air conditioning in a commercial building setting? Example: 5 ton unit; equipment requires 4 tons of air conditioning using two 30 amp breakers at 208 power. Power per kw is $07.
		15-May-08		We live in FL & have a unit that is 20 yrs old. It has to be replaced, but we would like to know how many tons we need for our 2800 sq ft home.
		08-May-08		Dear Sir i need to know the design and selection criterian of Electronic Energy Meter.... hope to see an answer from you
		03-May-08		A typical 120-volt household circuit delivers 350 watts of power to an appliance, and another 10 watts of power are consumed by the circuit. There is no ground fault. a. How much current is carried by the hot wire? b. How much current is carried by the neutral? c. How much current is carried by the grounding conductor? d. Calculate the resistance of the circuit:
		28-Apr-08		how much more money do i save between a 1ph and 3ph package unit, and does using r22/r410 make more of a difference in savings.
		28-Apr-08		how do i calculate the cost savings of a 4ton package gas/electric a/c unit and whats the formula i can use.im not sure how to determine this for any unit.thanks for help.vic
		28-Apr-08		how we can select an earth conductor size for a panel or an equipment
		18-Apr-08		whats the formula to calculate the tons of air conditioning required for a given area?
		05-Apr-08		Could you please, as simply as possible, give me a formula to calculate the heating time required to heat a given volume of water (liters) by x degrees centigrade using y watts of electric power?
		05-Apr-08		Hi Could you please give me a simple formulat to calculate the time required to heat a given quantity of water (liters) through x degrees centigrade using either watts applied or Mj consumed? Many Thanks David.
		02-Apr-08		I have a 130,000BTU boiler and I may convert to an electric boiler but I don't understand the relationship between the 2 measures as doing astraight conversion you come out with 38+KW and that's far too big a ifgure for the boiler I should need. What do I need and why? I am also trying to find up to dtae comparison for heating costs for oil and electricity as with the huge oil cost increase I think that the 2 fuels must have got closer now even with the elctricity increase. Do you know any recent figures? Thanks
		01-Apr-08		Interested in the viability of a dealership with a company called (easi) energy automations system inc. Are they reputable and is the business that wide open for me to invest $45000 to become a dealer. Also any other pertinent info would be appreciated
		28-Mar-08		I would like to know how I can determine the BTU's necessary to heat my home efficiently. I am going to install either a Buderus oil boiler or Buderus gas furnace and do not want to overestimate the size of the boiler or furnace. I have received four different estimates and each company has recommended a different size unit. Whom do I trust?
		27-Mar-08		I did some home improvement stuff this year and try to take it off on my taxes but it is asking for amount of kilowat energy I have a 16x80 mobile home.
		19-Feb-08		How many kw,s does an 8'-2 lamp style florescent t12 light fixture use?
		11-Feb-08		im looking into solar panels how many watts would i need to generate power for my 1400 sq foot house.i have a 2 ton air unit,a fridge,dryer,washer,microwave,stove,3 tvs,ect.i dont wont to depend solely on my power company,i want to become self reliant.
		09-Feb-08		I had bought a skyline doublewide in 2001. It had a miller forced hot air propane furnace, model number m1bc066gas. in 2002 a heating and cooling company came out and installed an ac coil and exterior unit outside. my problem is that it blows air out from the bottom of the unit. the ac coil is not connected to the floor of the furnace, is this correct? the water lays in the drain pan. this causes mold. i proped up the drip pan with boards so the water can drain,but it causes more of a gap then before and blowes more air out the bottom. my friend and my dad are handymen, but not sure what to do. i don't have the funds to hire a certified tech. what can they do? thank you for any help.
		05-Feb-08		How many BTU's will it take to heat a machine shed that is 36' x 80' x 16'high with a R value of 29?
		31-Jan-08		What amp service panel would be needed for a 2200 foot house with a 3 ton heat pump on the bottom floor and 2.5 ton heat pump on the second floor. It will have a 4500 watt water heater, diswasher, well pump, range, and dryer? I do not know the KW of the auxilary heat on the heat pumps. thanks, Kenny
		30-Jan-08		I have a 28X14 room with 9'walls how many watt baseboard heater will I need in northern NV.
		28-Jan-08		What size BTU gas furnace should I get to heat a one story 2028 sqft ranch with full crawlspace? Thank you. Also, what is the best method to use to insulate that crawlspace. It's 3 feet tall, I know spray cellulose is too expensive...so, any other suggestions?
		21-Jan-08		I am looking at replacing my existing heating system with a propane gas fired condensing boiler. There are several on the market. Do you have any recommendations. I will be heating a 1800 sq ft home with runtal baseboard radiators.
		09-Jan-08		I've been told on numerous occasions that running a piece of equipment at 480vt 3-PH using a step down transformer(to 240) is much more efficient and adds Cost Savings than running the same equipment at direct 240vt 3-PH. Is this True or Myth? Any idea on the percentage of savings? Thanks
		04-Jan-08		We have a tri level home total current living square footage is approx. 1400. We are getting ready to add on a 600 sq. ft. area. What size of heating and cooling unit do we need. We live in KS. Thank you
		02-Jan-08		How many BTU or Therms(Natrual Gas) dose it take to heat 40 GPM of water from 60 degrees to 70 degrees? And the same with air flow, how many BTU dose it take to heat 40 CFM of air from 40 degrees to 50 degrees?
		11-Dec-07		We live in a very mild climate. Our old heating unit under the house is shot. Want to replace with a heating and air conditioning unit for 1,000 sq ft home in SoCal. Very mild temps but when we need it of course we need it. New 6 inch ducts are in. What's the best unit and price we can find for our situation. thanks a million
		18-Nov-07		what is difference between ELCB & RCCB
		14-Nov-07		how many btu's are required for a gas furnace to heat 3400 square feet
		07-Nov-07		Between the Flood Lights and the Streets Light which one saves the energy and how is that possible.
		04-Nov-07		i have a couple question how much does it cost to install a forced air furnace. how much does it cost to run a forced air furnace. Does a forced air furnace have bad side effects. how much is it to install one. how long does it last.
		03-Nov-07		i am trying to explain to bussiness owners the ideal of power correction. how can i callculate the amount of possible savings to them. this seems to be the bottom line question
		31-Oct-07		How much quantity of water @ 24 deg C can be cooled down by an 180 TR chiller in one hour?
		08-Oct-07		Hi, I usually heat my home with pea coal,and use my gas hot water furnace for supplement heat on very cold days. But this year we wanted to switch to a vented gas space heater. I have found the Rinnai and Reznor brands. Rinnai is quite expensive, but seems to be tops. The Reznor is lots cheaper but also sounds good. Can you recomend me a good brand? My house is a bi-level 55x30 and the 2 car garage(part of the house) is 25x25. I would want to use this vented heater for my main heat and use my gas hot water furnace to supplement for very cold days. How many BTU's do you think I would need? I replaced all my windows 7 years ago with argon double insulated windows. Does it even seem worth the effort to save gas this way? I live in Orange County, NY. Thank you for your attention to my question..
		24-Sep-07		How much does it cost per foot to install wireless technology?
		03-Sep-07		moved a 480v 60 amp piece of equpiment to china and they are having trouble with the motors running hot they have it hooked up to a setup tranformer to get 480 volts will it take and voltage regulator to get motors to run cool or will they have to change out motors
		30-Aug-07		acceptable ranges for welders near and far vision are
		16-Aug-07		I am looking for a general rule of thumb for quick estimates. Tonnage*(x)=gpm (gpm*y=bleed gpm) +(gpm*z= other losses)= Makeup gpm.
		16-Aug-07		I have done my BE in Automobile and M.Tech in Mechanical. I am a certified Energy Auditor by BEE in India.presently I am working as a Asst. Professor in Engineering College in India.I want to make a career in Energy Auditing.So i want guidance about how can i make a start in this upcoming field?
		15-Aug-07		can anyone tell me the difference between a 220 and 110 air conditioner and the pros and cons about same
		07-Aug-07		How can I light a 1200 sq ft soccer field? Size of light and how many.
		03-Aug-07		Cooling towers can generally return cooled water that is warmer than the wet-bulb temperature by something on the order of 5 to 10 degrees F. Is it possible to use one cooling tower to cool water to 10 degrees above wet-bulb, and then use that cooled water to pre-cool air for a second cooling tower? By passing the water and air to be cooled through a radiator like heat exchanger, the air entering the second cooling tower would have a lower wet-bulb, and could then produce cooler cooled water. Thanks, Dick Mills
		30-Jul-07		Looking to replace a 50 year old boiler in my home. How do I size a new efficient oil fired boiler for a 1400 sq.ft.one floor ranch style house with hot water baseboard circulation?
		28-Jul-07		how much per sq feet is it to finsh a bedroom need to install sheet rock tape and mund then paint
		28-Jul-07		I would like to know what percentage of electrical energy going to an air compressor becomes heat.
		21-Jul-07		can you describe any innovative change that can be implemented in order to ensure that one retains its competitive edge?
		21-Jul-07		I HAVE ONE 40W ELECTONIC CHOKE & TWO 18W TUBES.IN THE CHOKE OUTPUT 4 WIRES ARE THERE. HOW CAN I CONNECT IN SERIES.
		11-Jul-07		I want to put a wall unit for a air conditioner and heater unit in my new room How many BTU unit do I need? My room is 25 by 14
		06-Jul-07		I am trying to figure out what heating/cooling system will be the best for my situation, and I have been able to convert all of my findings to the cost/delivered MMBTU,s but how many MMBTU's does the average house use to heat it and How many MMBTU's does it use to cool it. I would kind of like to know what the annual cost would be. Thanks
		06-Jul-07		whats inside an floresect light bulb
		03-Jul-07		What would be the best way to calculate the heat load for an electrical distribution room on an industrial site? This room has 2000 KVA transformers, VFD,s and disconnect buckets for equipment in the plant. I am trying to properly size an air conditioning system.
		28-Jun-07		We live in North Georgia. Today the temperature is 91 degrees. We have been in our house 1 year and have a Ruud Achiever Series Heat Pump, Model UPNK-036JAZ 13.0 Seer AC Unit. Our home is about 2200 sq (ranch) on a full basement. We keep our thermostat on 76. The air kicks on around noon and never cuts off until around 8 or 9 at night. It usually can maintain 76 in the house but if I lower the temperature it cannot keep that lower setting during the day. We had company over the weekend and I lowered the thermostat to 74. It could not cool the house lower than 77. Is this normal? Thank you for any advice...
		27-Jun-07		We want to budget for a new forced hot air heater for a townhouse we are looking to purchase and want to know how much we should budget for a new unit to replace the existing 25 year unit for a townhouse in NJ of about 1,000-1,250 square feet. We will only be replacing the hearer since the AC unit was replaced about 4 years ago.
		20-Jun-07		How much power do I need in my electrical panel to service three floors in my house with a total of 5600 square feet with 3 A/C and heating units, dryer, washer, oven, and various other electrical appliances? I only have 150
		20-Jun-07		How many tons of heating and air conditioning do I need for a 1800 square feet basement?
		19-Jun-07		How do I determine the tonage of a roof top heating and cooling unit?
		09-Jun-07		on a low voltage landscape lighting transformer whats on/off photo control feature mean
		08-Jun-07		Is there aaaany advantage to turning off flourescent lights in a room for only a few minutes? I understood that there was no advantage to this because it takes more power to start the lights than they would use in about 20 minutes. Is this true?
		04-Jun-07		Any advice on the best microturbines/CHP units available. What are the benifits both technically and economically of the different manufacturers and additionally the problems.
		02-Jun-07		How much R22 does a 4 ton InterTherm AC unit take to fully charge it?
		12-May-07		What BTU/tonne do i buy for an Air Conditioner if my bed room measures 17*17*10 feet.
		09-May-07		Im trying to figure out how much power a 4800 square foot parking lot with 4 towers of lights would cost?
		05-May-07		How much area will a 24000 btu a/c cool?
		27-Apr-07		How does a three-phase ELCb work when a £P+E load is connected?
		17-Apr-07		I am the recycler at Pratt Industries, Humboldt, TN. My question is do you have a contact for recycling tube flourscent bulbs? Any suggestions would be welcomed. Thank you! Debbie McCall
		07-Apr-07		I am a Student from a chemical engineering background, currently learning and working with a team of research group on the usage of solar thermal technology specifically :The use of SOLAR CONCENTRATING PANELS WITH EVACUATED VACUUM TUBES to heat water supplied in heat exchangers through out a crude oil processing plant.The current method in suppling warm water for heating purposes utilizes steam.An idea of reducing the current use of steam thus resulting some amount of savings to reduce the monthyly plant operation cost is the objective.Thus the idea of using solar power to maybe cowork with steam in supplying hot water had beed an area we are trying to reserach upon.Even so this idea might be out of a question for some, but we are still at a stage of trying to work out a feasibility study on this.My question is: 1. Has this type of solar thermal technology been manipulted for this type of usage( in crude processing plants) done anywhere so far in the world? 2. Our main concern is trying to reduce the payback periods involved, increase returns and increasing the efficiency of the solar and heat use.Whats the best option in realizing this goal from material selection to making it work? Your advice on this would be very much appreciated..Thank You
		05-Apr-07		what should be the size of DG,s required for giving power in a commercial building taking into consideration all fire loads,ac loads other loads etc.. .. is there any thumb rule for calculating the above thanks
		15-Mar-07		where would I find a 277V 10AMP non-fuse disconnect?, any style!
		15-Mar-07		What is the comparision between Thermal/BTU Energy Meters and Electical Energy Meters. Can we compare BTU meter's "KWH unit" with Electical meters "KWH units". Kindly clarify me?
		14-Mar-07		THE PROPER WAY TO CHECK AN A/C COMPESSOR TO 240V A/C APARTMENT UNIT.
		13-Mar-07		how much heat does a toe kick heater give? will one heater in my kitchen be enough...this is a hot water system.
		11-Mar-07		Current practice in our business is to turn off all banks of fluorescent lights at night and turn them on again in the morning. Recognizing that extra energy is needed to turn them on and that these surges shorten the life time of the ballasts, would it be more economical to leave them on at night?
		07-Mar-07		I have a family room with a catheral ceiling open to an upstair loft. The ceiling is approx 18- 20 feet high (2 stories. I want to put a ceiling fan in for energy purposes. My wife wants the fan hang close to the top of the ceiling. My question is how low from the ceiling should it hange to get the value of air circulation for heating and cooling purposes. Thanks,
		05-Mar-07		how many tons heat pump do I need for a 1500 sq ft. home?
		05-Mar-07		Is there a way to identify if a light fixture has T12 or T8 tubes with out removing the cover and looking at the tubes. I am with a University and it takes so much time to see if the fixture is T8 or T12 to estimate an upgrade.Some buildings have over 500 fixtures.
		28-Feb-07		What are ways to reduce energy usage for a VAV system with pneumatic thermostats in tenant areas?
		17-Feb-07		If a man drinks a quart of buttermilk before he starts . Then runs a mile before he farts . How long before he stops to poop ?
		14-Feb-07		What does the "EM" setting on my thermastat mean and when should I use that position? I have a heat pump and I seem to get more comfort from that setting. Is it harmful to the unit to do so?
		14-Feb-07		Is there a standard formula for calculating energy usage for multi-tenants of a shared building
		12-Feb-07		HOw do I know how many watts each of my baseboard heaters uses?
		09-Feb-07		How much energy is used in the manufacturing of one CF lamp? I can't find any information on the process and was wondering if anyone could help me start an investigation. The ballast electronics alone require more resources (variety not quantity) than a traditional incandescents. I was wondering if the energy used in the whole process (from materials mining, transportation, manufacturing of components and subsequent shipping, and final assemebly) truly is less than that of an incandescent (over time naturally).
		03-Feb-07		How many BTU's are required to heat a 12x16 room?
		03-Feb-07		im investigating the cost of running standard florecent light bulbs and would appreciate assistance on how to calculate the costs per hour or where i can find the information.
		31-Jan-07		I have 3 months of electrical usage in kwhr for a commercial space and the square footage of the space. How do I calculate watts per square foot? Do I divide the kwhrs by total hours in a month or just 8hrs per day or what is the correct method? Thank you Pete
		18-Jan-07		u ass why do u waste our time with a q&a forum that does not answer ANY questions dave and zack DOUBT YOU WILL ANSWER THAT QUESTION ..TRUST US YOUR SITE WILL BE LAUGHING STOCK AT THE JOBSITE..DONT WASTE OUR TIME ...ILL BE SURE TO SPRED THE WORD.........GUARANTEED
		18-Jan-07		how many btu in one ton of ac?
		04-Jan-07		How much energy does a T8 bulb save over the T12? What is the estimated cost to change out a 4 bulb T12 light fixture and replace it with a similar T8 fixture?
		02-Jan-07		We are remodeling our home and would like to add electric heat to a couple of smaller rooms. Could you tell me which would be cheaper to use, portable electric heaters or direct-wired electric heat?
		27-Dec-06		why is my goodman air condition unit blowing hot and cold air
		18-Dec-06		How many gallons of water is there in a basement of 1,150 sq feet and 21 inches of water?
		16-Dec-06		residence is located in Abbeville,SC. What size tonage of heat pump would we need for 1036 square feet?
		11-Dec-06		We are having new gas furnace, hot water system, intalled - how can we be sure contractoring is using new unit w/adequate BTU rating?
		03-Dec-06		I need the formula to figure out wattage of a 100w metal Halide light with ballast. Can you help me out?
		16-Nov-06		Boy, this sure seems like a worthless board. There sure are a lot of questions and not a lot of answers. Here's a question: How do you make a website and stop people from coming to it? Answer: Setup a phony "Ask the Expert" board and ignore posters questions.
		16-Nov-06		Hi, I have a 400W HPS ballast installation. When I switch it on (240 volts) it short-fuses. (The sockets fuse). Is there a device I can get or something I need to do to avoid this problem? Michael
		16-Nov-06		HELLO.I WANT TO KNOW HOW MANY BTU ARE REQUIRED APPROXIMATELLY PER m3?
		12-Nov-06		when do you need extra ventalation for a open flame gas fire thanks peter
		09-Nov-06		what is the difference between conventional copper chokes and electronic chokes. How to increase Power Factor.
		08-Nov-06		How do I calculate the pro-rata KW for a tenant if the bill says on kw, mid kw and off kw? Thanks, Bernie
		05-Nov-06		How do I calculate how many BTUs are required to heat x number gallons of water from y temperature to z temperature in w amount of time? This particular application uses natural gas as the fuel. Similarly, if I have a BTU value, how can I calculate how long it would take to raise x number gallons of water from y temperature to z temperature? Thanks ahead.
		02-Nov-06		how many btu's does it take to raise 1 gallon of water 1 degree?
		02-Nov-06		which color emits the coolest and hottest temperatures using a worklight?
		30-Oct-06		We have 2 and 3 bulb fixtures 4 foot flourescent 32 watt bulbs, If we remove one bulb, will this make the ballast fail faster, or weaken it in any way. Thank You, Tom Ness
		29-Oct-06		How much money would i save using a ballast box on a 400 watt sodium lamp
		25-Oct-06		What size of furnace (btu's) do I need for a new 2x6 bungalow that is 1250 square feet. I want to install a high effciency variable speed dc motor
		21-Oct-06		Does florescent lighting have any disadvantages to health or vision?? florescent lighting vs'general lighting? florescent light exposure on a daily basis???
		13-Oct-06		I am trying to figure out my savings by turning off the lighting for 12 hours as a night setback in our data center. What formula would I use to figure this out? Thanks
		12-Oct-06		I am about to purchase an outside wood boiler and I also need to purchase a heat exchanger. The heat exchangers are classified in btu's, how do I figure out how many btu's my house needs? Thanks, Adam
		07-Oct-06		We live in central Mexico, where winters are quite moderate. It seldom gets below freezing and then only for brief spells at night. Still, you need a heating system to warm the house at night and during the early morning. We are about to build a house that will have concrete floors and several people have suggested hot-water radiant heat. My question: How does the cost of radiant heating compare to other options? Thank you.
		06-Oct-06		in answer to the 400watt question: Providing the power factor is unity, a 400 watt lamp would consume 0.4kw in one hour, or 0.4kwhr http://tinyurl.com/o574n hope this answers your question
		29-Sep-06		how many kilowatts does a 400 watt bulb use in an hour and what would the cost be.
		22-Sep-06		Sir ,I am a third year engineering student. We are trying to make a project on digital wattmeter. But we were directed us to use an ic ,ad 7757 . Please guide us whether the use of this ic would help us in the project or will it entirely make up for the project leaving us nothing to do in the project. If the ic is of some use please guide us with the related circuitry and other blocks of the wattmeter.
		22-Sep-06		how does a balast work
		13-Sep-06		What is the working principle of ELCB/RCCB, and detailed working of it, along with the type of protection it offers and the ones it does not
		13-Sep-06		How far must copper wire be from flourescent lighting?
		06-Sep-06		hi i need to prepare a project at the colege level which is mechanical / industrial wud be xtremely gud if the project i plan to make is software operated need ur help can u suggest some ideas or some real gud projects
		05-Sep-06		How many BTU's do I need in a central air conditioning unit for a 1150 ft. home?
		30-Aug-06		How many BTU's do I need for a 2300 sq. ft room?
		28-Aug-06		A large portion of our business uses floresent lighting, the owner of this establishment(in her 90's) goes around continually flipping off lights. Usually they have to be turned right back on in a matter or minutes. What is the most economical way to use floresent lighting..I have understood that it takes more energy to turn them on than it takes to burn for several hours, plus wear and tear on swithes, starters (if applicable) and ballasts. Can you give me an idea how long an average flor. light needs to be off before it would be worth turning off? I have heard 3 to 4 hours. Thanks, Randy McCarty of McEvoy Funeral Home, Inc. Paris, TN. 38242
		27-Aug-06		Boy!, Look how much time/effort people have spent, and not one question answered in recent history!!!!
		18-Aug-06		I am getting a Gas heater for a room 20x24 ceiling 10 feet high Insulation in walls is 6 inch bats and in the Ceiling is 6 inch. 4 windows 36x24 How many BTU do I need ? or will 35000 BTU Gas Wall heater do it Thanks
		18-Aug-06		I want to buy a gas fireplace insert to use as primary heat in a 1300 sq. ft. two story home. The fireplace is right at the base of the stairs to the second story, and the floor plan down stairs is open. I'd like to know how many BTU's are needed to heat the space.
		06-Aug-06		Why are there no answers to most of the qustions posted on this site??? There are some good questions that deserve an answer (of course many of the questions do not deserve an answer and I can understand that)
		01-Aug-06		We are current seperating property and buildings do to a sell-off of one business entity. The new owners have installed a watthour meter in a 1200 amp, 480v 3phase switch supplying power to our facility. Each feeder has 3 650mcm cables tied to it for a total of nine power feeders. They claim that they take the reading from there watthour meter and multiply it by (x) 3 to come up with an aggregate amount of total wattage, and then multiply that by the going rate of.089 cents per kilowatt, is this right? The amount seems way out of line. Thanks, Judd Tounshendeaux
		26-Jul-06		I'm trying to find out how many watts are being used to raise the internal temperature of room by fourty degrees Farenheit. What formulas and conversions should I use. This is for a radio station transmitter. We're trying to find out how many watts are being used to raise the temp from 90 F to 130F. Any help would be appreciated.
		24-Jul-06		I am considering installing a mmmMunchkin system to provide Hydronic heat for my in floor system and hot potable water for my 2600 sq. ft. place in northern Minnesota. I AM INTERESTED IN THE TROUBELING OR NEGATIVE EXPERIENCES YOU MAY HAVE HAD WITH MUNCHKIN SYSTEMS--THANKS
		21-Jul-06		I have a one level brick home (build in 1951)in Mobile, AL. It is well insulated, but on the SE side of the home, I have a large picture window as well as 7 regular size windows, what ton AC unit do I need for adequate cooling?
		20-Jul-06		Is the company Energy Automation Systems Inc. a reputable company?
		19-Jul-06		We have a waste water slurry pump system to tailings dams offsite with multiple outlets to the tailings dams where slurry is dumped at differen times to balance slurry level in dam. Due to the size of the tailings dam delivery head differs substantially to the extend tat deluvery to furthest outlet requires 6 slurry pumps in series to deliver. At nearest point we currently utelise one of the 6 pumps whilst thw other 5 pumps are disconnected but still in fluid line, resulting in offline pumpsand motors being rotated by throughflow of slurry. What is the potential for energy savings if we install a single pump bypass system to deliver to the nearest outlet witout passing through the offline pumps? Your reply will be appreciated Johan
		18-Jul-06		What BTU do I buy for an airconditioner if my room is 12x12' ?
		18-Jul-06		What BTU do I buy for an airconditioner if my room is 12x12' ?
		18-Jul-06		What BTU do I buy for an airconditioner if my room is 12x12' ?
		18-Jul-06		What BTU do I buy for an airconditioner if my room is 12x12' ?
		18-Jul-06		What BTU do I buy for an airconditioner if my room is 12x12' ?
		15-Jul-06		I own a 1250 square foot townhouse. What size central air unit should I buy? I was looking at a 3 ton Rheem.
		11-Jul-06		How do I obtain a Connecticut universal tech CFC in less than 90 days? Are there classes CFC only with out taking a complete HVAC course in Connecticut?
		06-Jul-06		I heard that if you turn off a florescent light and turn it back on you use 4 hours worth of electricity to start the florescent. Is that true and if not how much does it use?
		29-Jun-06		In an office setting with new flourscent lighting, when you leave your office during the work hours is it more energy efficent to turn off the lights each time you leave your office or should you turn them on and leave them on throughout the day during work hours? With flourscent lighting is it like your Mom told you...Turn that light off when you leave the room?
		21-Jun-06		I have an industrial unit with 400w sodium lights (hps) they do not have any power factor corection how would i work out the size of the capacitor needed? many thanks.
		08-Jun-06		There are two questions on your site regarding EASI (Energy Automation Systems Incorporated). So it appears that this company is generating some intrest from investors and potential cusotmers. I too am interested in an outside expert opinion regarding this company and it's products. They have a very attractive business proposition but before investing in it I would like an expert opinion regarding their technology and how it compares to market alternatives.
		07-Jun-06		I have a 1930, two and 1/2 story colonial home, 1381 sq. foot of space. I am debating between a 2 ton or 2 1/2 ton central air unit. I only have cold air returns on the first floor. I am looking to save a little dough since we are not planning on being here for that long. Any recommendations?
		05-Jun-06		I have a single wide 16x80 Fleetwood trailer home with a 1 1/2 ton central HVAC system. Last year we found a condensation leak in the unit closet. Our solution at that time was to put a drip pan in the closet and cross our fingers. We thought the finger crossing worked because this year the leak was no where to be found. We have now found our floor vents to be holding approximately 2 inches of water. Where did we go wrong? Could it be last years leak has appeared again in a different spot and is filling up our vents?
		02-Jun-06		We are having one direct fired reboiler as a part of glycol regeneration system with Fuelgas as a fuel & I wanna know the formula, being used to calculate the fuel gas consumption in order to verify the reboiler performance.
		01-Jun-06		re window airconditioner - how many btu's for an 900 square foot brick bungalow?
		28-May-06		what subject must i study in school to become an engineer??
		25-May-06		formula for calculating energy recovery in seawater reverse osmosis
		02-May-06		My company is putting together a mobile fireplace showroom. We will have up to 200K BTU's of fireplaces on at one time. Is a typical 13k btu A/C unit going to work? any suggestions with math or theory backing it up would be great. By the way this trailer has no insulation, only a 4x6 door will be open and must be confortable to write sales orders in. thanks
		09-Apr-06		the main issues associated with responsible use of water and how you would handle the challenges that you see on a global basis.
		03-Apr-06		Proper matching of condenser units to air handler units per btu's. What is the acceptable ranges of different btu's. ( example 30,000 btu's at condenser and 24,000 at air handler ) Heat pump systems, equal btu's, two ton outdoor with 2 and 1/2 ton indoor unit etc.
		03-Apr-06		formula for calculating horse power of compressor in refrigeration
		03-Apr-06		formula for calculating horse power of compressor in refrigeration
		31-Mar-06		I own a 900 square foot cabin with a 1970's counterflow natural gas wall heater. I have looked at brochures for new counterflow wall heaters and they look like they are built the same way. Would it be worth buying a new one as far as efficieny?
		30-Mar-06		What size capacitor would I need to install in a sign light box,that consists of 48x58watt daylight fluorescent tubes.Ballasts are standard wire wound atco's.The current draw on this sign is 28amp.Going by atco's specs a 58w tube needs a 6uf cap to give 0.9 power factor.I am trying to avoid having to put 48 caps across each tube to obtain a good power factor. Would this lower the current draw of the sign so we could run smaller cable to the sign?
		26-Mar-06		I would like to obtain the method to calculate lighting heat load in terms of w/m2 by using light intensity (lux) in the formula for different types of lamps.
		25-Mar-06		I live near Boston and would like to install a Mr Slim heat pump in my new sunroom for both heat and a/c. Will the heat pump produce any heat at all if the outside temp drops below about 20 deg F or will it simply be less efficient?
		24-Mar-06		Is it possible to provide me with details surrounding monitors and/or controls for energy consumption and electrical devices, for the purpose of a motor vehicle. I am particulary interested in the E.C.U used in the new Toyota Prius, as of 2005. Regards, N. Sibio
		22-Mar-06		I have 10,000 CFM air flow @ a 66 degree F. increase. How many BTU's do I have.
		13-Mar-06		I live on the third floor of a one bedroom apartment that is 600 SF and my electric bill is over $150.00 every month. We don't use much electricity and hardly ever turn on our heat or a/c unless it is unbearable. Our water heater is electric, I don't know if that helps to know. I don't understand why our bill is so high. Could an electric company like Dayton Power and Lights be cheating us? Does someone else in the apartment complex have the ability to use our electricity? There are a couple of things that may be a causing factor:1.) Our windows don't have a great seal 2.) I don't know how old our filters are and 3.) The building was prob. built in the late 70's or early 80's. Please help, it's driving me crazy and I don't know what to do. Thanks, Tasha Rumford
		12-Mar-06		what would cause the fire in a home boilier to go out and the gas to remain blowing full force...the boilier is about 15 years old, and had been idle for about 8 months..... thank you tony
		06-Mar-06		Is 3 phase cheaper to use? When you read the meter and it says I used 20 KWH for that month , is the electric company justified to multiply that by 40 ? To say I used 800 KWH for that month? Are they justified to charge a DEMAND Fee? And say it's because it spikes to turn on the piece of equipment? Thanks
		26-Feb-06		Why in India the Voltage is transmitted and generated in the multiples of eleven.
		21-Feb-06		In a office/conference room setting, is energy saved by turning off the florescent fixtures for a short time? In other words, does turning on/off several times actually burn more energy (bulb start up)?
		16-Feb-06		I'm looking at PROA refridgerant energy saving additive for HVAC systems. 1. Does it work? 2. Can it be installed with any refrigerant? 3. Pit falls?
		15-Feb-06		what are the energy saving measures in electric motors & which is the cheapest means?
		10-Feb-06		Can anyone tell me what the average, or standard therms/SF is for heating a warehouse? This is a new box built warehouse. Assume 30 degree F as mean temp during winter. Thanks.
		05-Feb-06		i am buying a compressor for A Machine i have and I was told it needs a chiller dryer,exactly what is a chiller/dryer and what does it do,what does it run?? Electric?? how much power would it use for a 10 h.p compressor? thanks Angelo
		29-Jan-06		Hi, A guy we had never seen before came into our office last week and said he would do a free energy check. When he was finished he told us we had old T12 lighting and said we should change it for T8. Will this really save us power? Also he said we should have a motion sensor for each lighting fixture. He said the power company might give us a rebate for the sensors, but it still seems a lot of money because they are around $60.00 each and we have about 215 lighting fixtures. My boss was also worried about the lights going on and off in the showroom and she asked me to try and find out more. Can you help please? Appreciate any help we can get. Thanks, Linda
		24-Jan-06		I am selecting a home standby generator and need to know the KW required for two 2 1/2 ton outside compressors. The home itself, other than the compressors needs 10.5 KW for start up. I have been told that 12KW is sufficient to start two 2 1/2 ton compressors which would total 22.5 KW. I have considered ordering a 25KW generator. Do these estimates seem reasonable?
		23-Jan-06		Would a family of 3 or 4 people use more electric than say a single person?
		19-Jan-06		can you tell me some titles of books about "energy management"?i'd like somethings about maintenance to energy management..thank you
		11-Jan-06		In the process of changing out our chillers, replacing two 660 ton chillers opearting at.7kw per ton with 2- 600 ton chillers opearting at .543 kw per ton. one chiller operates 24/7 How do you calcualte a pay back. Current rate for power is .07 cents per kwh per, increasing to .091
		09-Jan-06		Hello, I recently added a sunroom of 15X15 and decided to install a 17000 btu heat/air unit (with a 220 outlet) instead of having this room added to the existing central heat/air unit. My first electric bill was extremely high and the kwh usage went from 2190 the prior month to 4687. My question-Will the use of this unit cause such an increase or should I be looking at other areas like wiring or maybe the breaker box is overloaded? Can you please give me some direction for corrective actions?
		04-Jan-06		could you please tell me if a electric fan heater with the same watage as a helogen heater would use more electric? basicaly do they use the same amount of elecric???? many thanks craig
		02-Jan-06		What kind of interior lighting uses the least energy. Incandescent, florescent, low (12 volt) voltage. So I'm guessing lumens at a given distance vs total watts used. Keeping in mind that low voltage uses a transformer which looses some energy in the form of heat??
		31-Dec-05		Is it possible to reduce the flow of heated water in a baseboard system to a certain area within a zone?
		27-Dec-05		I live in an approximately 1200sf ranch style home in near Atlanta, Ga. My HVAC is very old. It is a furnace/split system. Last summer, the a/c compressor went out. This winter my heating(gas) bill for november (relatively mild)will be over $300. I estimate my gas bill for jan to be $500-$600. I plan to replace my entire system in spring when it warms up. What is the best route to go economically: Heat pump with gas furnace; Heat pump with electric strip heat? I know the heat pump will cool in the summer, but i heard they don't work too well in the winter? What is the most economical invertment? Thanks
		20-Dec-05		How many watts is 15000 btu?
		15-Dec-05		We are planning on replacing our furnace with an energy efficient of at least 90%. How many BTU's do we need for our story and 1/2 house? There are 1200 sq. ft. main floor and 500 sq. ft. upstairs. Thanks, Keith
		14-Dec-05		Is anyone familiar with a survey or calculation, which will show an approximate percentage of savings due to using Building Automated Systems (BAS). I am looking to show a perceived savings due to the use of automated lighting, HVAC night setback (unoccupied settings) and even load shedding of parking lot lighting. Any help on this would be great. Thanks
		14-Dec-05		I want to heat and a/c a 462 sq ft garage conversion with a thru the wall heater a/c unit. How big do I need.
		13-Dec-05		I recently purchased a 1,400-sq-ft cabin, with a half-loft, in the mountains of Colorado (approx. 9,000 ft elevation). Presently it is a shell to which I am insulating and installing a combination of drywall and tongue-and-groove wood. One wall is mostly windows. I am considering heat sources to maintain 45F during the winter months to prevent water pipe freezing and drywall from cracking when we are not there. A woodburning stove will heat the space when we are in residence. Question is what type of heat to use. I have eliminated forced air due to noise. Base board heat seems the way to go. But electric, oil-filled or ceramic? Also, how many do I need?
		12-Dec-05		Does any one know the color coding used as a standard for Europeon 220 Volt wiring. I recently purchased several Refridgerators that were intended for use in Europe. ( 220) Thus far we are having a tough time determining which 2 colors are "Hot" wires and which color is the ground. Help!
		08-Dec-05		I had heard energy management training was available on the University of Wisconsin - Madison campus. Where and how do i get connected with this training? UW-Milwaukee is also an option. Richard Feustel
		08-Dec-05		I recently had installed a Viessmann 050 ECD-S, 115 gas bolier. The square footage of my house is 1800, and I am told that the bloiler is to small. How do I calculate how mnay BTU I need.
		06-Dec-05		Has anyone used PLC's networked to control multiple Air Handling Units and implemented a energy management strategy with the PLC's and a head end?
		03-Dec-05		hi, to get page views for the adverts? I answer questions, leave a contact email address cheers, John.
		03-Dec-05		this sire is a joke> I came here for help and no answers have been posted for anything . Whats the point?
		03-Dec-05		there are 1000 watts in a kilowatt, kilo=1000
		03-Dec-05		Why are so many questions unanswered? If you post an email address other can answer without waiting
		30-Nov-05		WHAT IS THE FUNCTION OF A ZENER DIODE IN ELECTRONICS.
		28-Nov-05		Can I safely use small fluorescent bulbs in an enclosed ceiling fixture? Also, can I buy these bulbs for lamps with a 3-way off/on switch? What hazards are associated with the use of these energy-saving bulbs in these two situations?
		27-Nov-05		It is my understanding that ceramic heating elements are more efficient than metal coil elements. If this is the case, could someone inform me as to what percent of increase in efficiency ceramic elements have over metal coils.
		26-Nov-05		i have a four season porch that needs heat, i'm thinking about a selfcontained thermostat baseboard heater for out there for when we have company, the room is all insulated including the floor. the room is 27' x 11' with 4 four ft slider windows that run across & 2 4 foot slider windows on each end. How do i figure out how long of a baseboard heater i need.
		17-Nov-05		We have a small 4 season porch that needs a heat source. We were considering a ventless gas heater. The porch is aprox. 200sq ft. What size in BTU's should we be looking for? Thanks for any help you can give me.
		15-Nov-05		I am trying to find out the heat output expected from a 75 horsepower 460/60/3 water pump.I do know it is pulling 176 amps. I also have several smaller pumps that we cannot locate horsepower on yet that are also 460/60/3 and are pulling 66 amps. We are trying to size supplemental cooling for the building and need these factors.
		15-Nov-05		Please help me in selecting the best quality and good performance splict AC for Home use of about 200sq. ft.
		14-Nov-05		I would like to know all the possible pros and cons for installing your own transformer for a commercial/retail business. I have already built 30 stores in Mexico, and will be building another 100. I have to ac a sales floor of about 1000 sq feet. It is by far my most expensive item. Are there any ways a transformer might save you money, other than the electric company charging a primary rate or the next highest rate? Thank you
		14-Nov-05		Is EASI from www.easipro.com for real or is it a rip off. See also, www.easibusiness.com
		14-Nov-05		Should you DE-RATE a circuit breaker rated 120v/60hz on a 240/50hz circuit?
		12-Nov-05		I'm writing a formal proposal and I would like some key points on why my company should install LED lights on their new building rather than fluorescent ones. The major argument is that they are very expensive now.
		12-Nov-05		hi, We require a circuit of conductivity meter. please do the needful. Aniket
		09-Nov-05		how many watts in a killowatt?
		08-Nov-05		I am trying to find out the cost difference of heating a 2200 sq. ft. Pro Shop with cathedral ceiling during the winter when the Oct-April temp is generally set at 50 degrees inside and the exterior temps range from 30 to 10 below zero. The temp in the building will be set at 70 degrees for approximately 25 hours per week. We have purchased LP gas at $1.25 per gallon.
		07-Nov-05		Hello, I am planning to go abroad on vacation for a month during December and wonder if it is a good idea to put the Airconditioning plant (Heating, since it is winter) OFF. What are the things I should consider? Thanks, RK Ambat ========
		03-Nov-05		is bucky gay
		02-Nov-05		Can a halogen bulb rated 12v ac be connected to 230v supply? The guy in the store actually showed me and it worked. Is it safe?
		31-Oct-05		i wish to air brush paint on hobby's and crafts in my basement.which air compressor will last for years of crafting?
		23-Oct-05		we just bought a stove. The addvertizment said it was 99% heat efficient& it puts out 30000 btu's. The salesman said it would heat 1000 sq, ft. As we were putting it in, we noticed the label on the stove said max.btu 21000.min. 15840,& the heat efficienty is 72%. will this heat 1000 sq. ft.?why the difference? thanks
		19-Oct-05		Same as aug. 2nd 2005. A thermostat in which I can lock min and max temp wituout tenants access to change. Gas only baseboard
		18-Oct-05		How many tons of AC do I need for a 2600 sq ft home?
		17-Oct-05		What kind of heating technology is best for outdoor use. I want to use gas, not el.
		16-Oct-05		how much do i save using a 60 watt bulb versus a 100 watt bulb? 5.990cents/ kwhr
		11-Oct-05		how many kw of power do we require to heat a 5.5m x 5.5m x 2.5m thermally insulated room to a continuous temp of 40 degrees celcius
		07-Oct-05		I am looking for the most energy efficent air conditioner in the 3 to 4 ton range, i have a list of the best, only what i really need is to understand how much electricity on averag will this unit consume? I am doing a solar system to offset the air conditioners usage, my system will produce 21 kw a day and this is in a very effiecent home whit walls of 35 r value. Can you help????? Cory
		05-Oct-05		I am looking for some help on calculating the btu rating of an air conditioner. For Ex. a solid state (TE based) air conditioner that cools 22 cfm of air 22 degrees below ambient equals what btu rating? I don't know what other data is needed or if I even have it, but the whole unit draws 290 watts with 204 watts going towards cooling. Ambient air say 80 degs with 50% humididty. Is there an equation that I could use to figure out what the btu rating would be? Also in there to calculate efficiancy based off of these numbers. Thankyou
		05-Oct-05		How does ELCB works? what is ELCB working princple? Please illustrate the working of ELCB.
		30-Sep-05		How many BTU do I need to heat a 1000sq ft house. Any suggestions on an ac unit as well?
		29-Sep-05		I have two old reznor forced air gas heaters (25 plus years old) in a 4,500 square fiit building, 12' ceilings, without any insulation. We also have a large garage door we open frequently in the winter for our vehicles. Would either gas or electric infrared heaters be worth the investment?
		28-Sep-05		If I use 20amp breaker instead of a 15 amp breaker, will it cause any problems?
		27-Sep-05		whats the process of an A/C sytem starting from the thermostat? what triggers it compressor, condensor, evap fan, coil, selnoid in what order do they all go?
		22-Sep-05		How many BTU's do I need to heat a 960 sq. ft. house. With a gas furnace?
		21-Sep-05		what is the average cost of geothermal energy per kilowatt. this is for college reseach we would appriciate if you could answer us by friday. Thank you very much Nancy
		20-Sep-05		Hello I just need a rough estimate here. I am the Fitness Director at a YMCA. We are trying to cut down on energy costs like everyone else. We ahve a gym with 20 lights 250 watts GE MulitVapor lamp Bulbs By closing it for 6 hrs per day...do you know roughly how much money we would be saving or is it definitely worth keeping the lights off to save money Thanks Mike Fleming
		15-Sep-05		we are in the process of redesigning a factory in Illinois for energy efficiency on basically 2 counts: lighting and heating. Any tips - general or specific?
		14-Sep-05		Our local ice arena has 42 400W mercury vapour lamps. Our demand peaks seem quite a bit higher then the rated load. Approximately how much extra power is required at startup. Each breaker controls 7 lights. Would it make sense to light each row with an interval (say 1 minute)in order to keep our demand load lower and reasonable. Sorry if this sounds too obvious. In closing, would mercury halide lamps be cost effective replacements. Thanks Don
		14-Sep-05		We are replacing a 140 ton York Chiller (Reciprocal)and cooling tower at one of our hotels. We have asked York, Trane and Carrier for bids. Additionally, another company is suggesting Tuborcor as a replacement. Are these the top three companies for this type of application? Is there any data that supports Tuorcor is a reliable alternative?
		13-Sep-05		Would I need a 4 or 5 ton a/c unit for a 2200 sq ft. house? I have 14 windows in the house.
		08-Sep-05		Hi, We live in Maine and are looking into outdoor wood furnaces as an alternative to oil. Models range from 115,000 BTU's per hour to 3.5 million BTU's per hour. Can you give a estimate of the BTU's required as a function of square footage of the home? And are there other variables besides square footage that would come into play? Thanks.
		08-Sep-05		When doing hvac loads on a fitness center where all the fitness equipment has not been determined, what is the industry average for heat gain per square foot for all the electrical fitness equipment in this type of facility?
		07-Sep-05		I want to do a study on replacement of 1000 odd windo air conditionars with the centrifugal chiller machine in my company...kindly send me few case studies on power and energy sevings.
		05-Sep-05		I am about to begin a 2 year graduate program in Energy Management. This is a late in life career change for me. I do not have an undergraduate engineering background, but I have been reading extensively about energy technology, policy, and economic issues for 4 or 5 years. I am wondering if someone has an idea of what types of jobs and salaries I can expect to be able to get when I graduate. Almost all of the energy management jobs I have found posted on websites expect the candidates to be engineers. Are there jobs available in the industry for someone with an MS in EM, but no engineering degree or PE license? Thanks in advanced.
		04-Sep-05		Hi, i would like to know if there is any good reading material pertaining to how-to write good business/marketing energy audit report, as i am working as a Business developer in a new energy audit company.
		04-Sep-05		principle of R22 freon gas-used industrial chilling plants. characters of R22 GAS. REVERSE OSMOSIS PRINCIPLE.
		02-Sep-05		how would i calculate the power comsumption per Sq Ft. for a three-phase environment
		31-Aug-05		I am a property management assistant from New York who would like to know what are the laws governing the retro billing of commercial tenants for past utility costs. How far back can we reach?
		29-Aug-05		An art gallery is planning to retrofit incandescent trak lighting to a newer system. Discussion ensues - halogen vs full spectrum flourescents along with a redo of some of the original flourescents bay tube ceiling fixtures. Cooling is a problem in the building during summer - is there a way to calculate the range of heat produced from the halogens vs flourescents so that we could determine if the location has enough power to operate all elctricity needs and figure out if we are just operating our cooling system for the lighting if we use halogens? How do you compute the heat output and equate it to cost and consumption of energy. many thanks, d.
		13-Aug-05		I work in a central air-conditioned building. The locker room where the employees eat and sometimes sleep is NOT hooked up to the a/c sysyem. Is there a minimum and/or maximum teperature for rooms in a central air building? and What are they?
		04-Aug-05		I am fresh Engineering graduate from University of PUNE (INDIA). I have done my engineering in Electrical Engineering (B.E. Electrical). I intend to work in the field of Energy Audit as Ihave special interest in the field. Also I have studied this subject as my Elective subject in my final year of B.E. CVan you pleasse tell mme about careere oiptions in thuis field and also give me an idea, about how should I gom about it.
		02-Aug-05		Which would be less expensive, a window ac unit or having central ac? our electric bill was 255.00 and we live in a small 2 bedroom apartment. thanks!
		02-Aug-05		How do you determine what tonage and seer is appropriate for an 1851 sq. foot home with 10 - 12 foot ceilings?
		02-Aug-05		Is there a thermostat available for use with tenants, one that controls how high they can turn up the heat? For example, is there a thermostat where you can set the maximum heat at 70 F or 72 F so your tenants don't have it cranked up to 80 F with the windows open in January?