What are the next heating/cooling advancements beyond geothermal?

— Tom M. Rocky Hill, CT

Answered by Lucas Johnson on September 25, 2012

What size AC do I need?

— Joey Kramer Phoenix, AZ

Answered by Scott Grieves, CPM, CEA on July 19, 2012

Does using a ceiling fan save money while the air conditioner is running?

— Robin Lamb Levittown, NY

Answered by David Bergman on July 12, 2012

Is there such a thing as green air duct cleaning for a condo a/c system?

— Leslie Cedar Pompano Beach, FL

Answered by Edward Wright on May 30, 2012