Installing geo thermal in an old house with boiler? [more inside]
posted by idyllhands on Sep 28, 2009 - 8 answers

Replacing the AC and furnace -- is now the time to buy? Tell me what you know about rebates! [more inside]
posted by amanda on Jul 28, 2009 - 10 answers

Is leaving the windows in my attic cracked beneficial for keeping my air conditioning bill low? [more inside]
posted by JFitzpatrick on Jun 22, 2009 - 4 answers

Can someone recommend a programmable thermostat that will save me from insane energy bills? [more inside]
posted by griffey on Apr 14, 2009 - 8 answers

Our central AC/Heating system leaked some kind of, uh, oil (!?) last night. I have no idea what it is, the super is baffled. More inside. [more inside]
posted by GilloD on Dec 4, 2008 - 6 answers

When is a heat pump worth it? [warning: a bit long] [more inside]
posted by Shepherd on Aug 15, 2008 - 19 answers

Is fiberglass heating/cooling duct board safe? [more inside]
posted by wsg on Apr 9, 2008 - 2 answers

BrrrrrFilter: It's gotten cold here in Chicago and my heater appears to be broken. Google didn't help me much probably because my knowledge of HVAC is weak. Help me find out quickly if I'm being ripped off? [more inside]
posted by twiggy on Oct 13, 2006 - 15 answers

Our air conditioner is going out and has to be replaced. We are likely going to replace it with two standard units as the single unit has never heated or cooled the entire house evenly. The heating/air guy said that would be ideal but would cost 8-10 thousand vs 4 thousand or less if we just bought a new 5 ton unit. However the electric company is offering to loan people the money if they want to buy heat pumps. Not having a lot of extra money right now, that is tempting IF heat pumps are likely to do the job, which I am not sure about. [more inside]
posted by weretable and the undead chairs on Jul 26, 2005 - 10 answers

Why are radiators (the things connected to your hot water system that heat a room) usually painted white, when white is the worst colour for heat radiation?
posted by Mwongozi on Dec 13, 2004 - 19 answers