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We need to replace our oil-fired boiler. We have estimates for 4 oil-fired boilers but do not know which is best. Is a gas boiler better?

— Catherine Williams Orange, CT

Answered by Bill Bradbury on September 20, 2010

My apartment has a heat pump. How can I install a thermostat with a timer?

— susan Upland, CA

Answered by Sean Shanley on September 17, 2010

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

 
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