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When I turn on central heat I get hot air for a few minutes and then cold air. Help!!?

3 answer

37 yr old HVAC system has a heating problem I cannot figure out.?

5 answer

Im trying to make a heat exchanger for forced air, I need help.?

3 answer

how can i calculate convecting heat transfer coefficient for 1 shell pass ,4 tube pass heat exchanger ?

2 answer

I have a thru the wall friedrich heat pump and the fan will not work in heat mode.?

1 answer

can I heat my camping tent with my 170,000 btu propane forced air heater?

5 answer

How can i cool 5kW of heat with max deltaT of 7 with minium power input?

2 answer

What is the best setting for a heat recovery air exchanger during winter?

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I am looking to cool a sump of water from 80deg to 60 deg to be pumped through a plate heat exchanger?

1 answer

how can i get the hydrogen overall heat transfer coefficient?

1 answer

A question concerning heat transfer?

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The mass flow rate of a Freon refrigerant through a heat exchanger is 5 kg/min. The enthalpy of entry Freon is

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the pump makes noise, the heat exchanger is hot...no fog?

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Can I install a pellet stove in a house with a water boiler heat system. quad level house w/fireplace?

3 answer

If the fan of a force heat unit does not turn on when the heat is supposed to turn on, will the gas heater...?

5 answer

I have an Apollo direct vent heating system, it is blowing cold air for the heat. What should I check?

1 answer

How much would it cost to get central air in a home that has forced air heating only?

1 answer

My heating and air unit starts out blowing warm air and then it will change to cold air.?

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Where does the heat come from in a 1996 dodge intriped?

5 answer

Why don't nuclear plants reuse heated water?

4 answer

if my furnace is bad, can i still use my central air?

3 answer

Can anyone give me some advise on this? I have a fuel oil furnace. It is hot water forced heat.?

4 answer

the formulas of heat exchangers?

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Home heating it's cold (re-post to answer rec'd) ?

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In a heat exchanger with exchange between a liquid and a phase transition process which side to put the fins?

3 answer

i have a lenox pulse heater and for the last 24 hourse it isnt turning on all the time?

2 answer

AC on my 97 Ford Expedition blows out Heat when I put the climate control on full cool. Thanks?

1 answer

what can cause a shell and tube heat exchanger to block the flow of steam on the tubes side?

3 answer

how to make a simple heat exchanger ? (convert hot water to cold water)?

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Has anyone ever attempted to harness engine heat for lift in a buoyancy assisted airship? Lets call that a zep?

2 answer