What am I not understanding about my HVAC system? [more inside]
We have this furnace. In the summer it would be nice if we could run only the fan (We don't have central air), but according to the manual, Fan Only Mode requires the R and G thermostat contacts be wired. As you can see, only the RC/RH and W contacts are wired. Would simply swapping the orange wire from RC/RH to RH/G create the circuit needed for sweet, sweet fan action, or will it be necessary to run a new wire from G to the control board in the furnace, therefore requiring professional help? [more inside]
Is there a sensor device or thermostat setup that can inexpensively switch on a fan based on the difference between two temperature points (one inside, one outside)? [more inside]
Just replaced a 50-year-old tar/gravel roof with white shingles. This is in Florida. But now the house is hothothot, heat keeps rising, air-conditioner runs constantly but can't keep up! It's just after noon and 84 degrees in here! The roof is low-hip, the attic is a crawl space insulated to about R-30, there's a turbine on the roof and three passive vents. Still hot! Depressing after writing such a big check. Capable roofer says previous thick layer of tar/gravel probably insulated a lot. But now what's my next step? 1. Would a white latex coating be more cost-effective than a solar-powered vent? 2. Any other suggestions? Whew, and thanks!
I have air conditioning vents in the floor at the side of the room. The vents can be angled in different directions. If I put a large dresser against the wall, above a vent, with clearance of a few inches, will it be substantially detrimental to heating/cooling?
My part of the house is never comfortable! Help us with our tri-level home heating/cooling issues. [more inside]
Installing geo thermal in an old house with boiler? [more inside]
Replacing the AC and furnace -- is now the time to buy? Tell me what you know about rebates! [more inside]
Is leaving the windows in my attic cracked beneficial for keeping my air conditioning bill low? [more inside]
Can someone recommend a programmable thermostat that will save me from insane energy bills? [more inside]
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]
When is a heat pump worth it? [warning: a bit long] [more inside]
Is fiberglass heating/cooling duct board safe? [more inside]
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]
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]
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?