I have a 20-year-old furnace. [more inside]
posted by Nonce on Oct 20, 2009 - 15 answers

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

What can I use to dampen vibrations from a water pipe? [more inside]
posted by bondcliff on Dec 2, 2008 - 8 answers

We just boxed in with drywall a round 5" heating duct, running from floor to ceiling in the corner of the living room. Because of some odd features of the room, this took up more space than it should. What I'd really like is to replace the duct (and drywall) with a paintable rectangular duct running up the corner of the room, that would look just as good as drywall. This would have to be rugged enough to withstand small children playing in the room (e.g. not dent like typical metal duct). Does this exist? [more inside]
posted by winston on Oct 5, 2008 - 5 answers

High-efficiency gas furnace installed where previously there was mid-efficiency. So it vents straight out the wall while the old furnace used the chimney. The vent is right next to the sandbox. How bad is this? [more inside]
posted by winston on Apr 26, 2008 - 5 answers

My forced hot air system has no return ducts. Instead, cool air falls directly into the basement, where there's a filtered intake on the side of the furnace. Are my life, health, and or selling prospects at severe risk? [more inside]
posted by a22lamia on Sep 20, 2007 - 9 answers

What form of energy is used to heat a Wal-Mart, Home Depot or Costo store, and how much does it cost per month in the winter? [more inside]
posted by colgate on Apr 8, 2007 - 12 answers

Not-My-Walls-To-Cut-Through-Filter: Anyone have experience running Cat5 through HVAC ducts? [more inside]
posted by datacenter refugee on Jan 14, 2007 - 15 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

What can we do to get more air from the air conditioning (and the heat in the winter) to the back of the house? [more inside]
posted by winston on Jul 29, 2006 - 17 answers

8 unit condo in Jersey City needs an energy (HVAC, heating) consultant to look at our boiler and heating system and advise us on how to lower our heating bills. We are keen to consider green options but economy is the main criterion. Thank you for your recommendations and advice. [more inside]
posted by johoney on Jul 20, 2006 - 1 answer

Which direction should I point the louvres from my heating/ac vents? [more inside]
posted by crawl on Feb 8, 2004 - 4 answers