Is it better to turn off the AC during the day, using it only at night, or to keep it on day and night?

— Pete Gonzales Chico, CA

Answered by Cynthia Phakos on September 2, 2010

Should I go with an air source heat pump or electric radiant floor heat?

— Chris DiGiacomo Shirley, NY

Answered by Rick Goyette on September 1, 2010

What is the best furnace out there?

— Jerry Lawrence Aurora, CO

Answered by Dan Werner on August 26, 2010

Is there actually less wear and tear on your AC unit if you leave the fan running all the time, due to less stopping and starting?

— Lynn Priest Kelso, TN

Answered by Lee Hall on August 21, 2010

What is the greenest, best fireplace replacement?

— Beth Seymour, IN

Answered by Lee Hall on August 13, 2010

What do you think about geothermal heating and cooling systems?

— Richard Paltrineri Saugus, MA

Answered by Rick Goyette on August 9, 2010

I have heard it is most efficient to run the fan constantly for a central air-conditioning unit. Is that correct?

— Rich Chesterfield, MO

Answered by Hamid Kashani - AIA, LEED Green Associate on August 4, 2010

The air flow on the central air is barely cool even at low temperature. What might be wrong?

— Tom Swanton, OH

Answered by Dennis Cheslik on July 30, 2010

My AC service contractor wants to sell me a new unit with environmentally friendly Freon. What does that mean? Should I buy it?

— Ellen Stover Tampa, FL

Answered by Steve Saunders on July 29, 2010

My daughter has gone to college, so her room sits unused. Should we close it off and close the AC vents?

— Earl Bollinger Covington, LA

Answered by Tammy Schwolsky, LEED AP, GPR, HPwES on July 26, 2010

 

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