Can central air be installed in a 1950s home that has a floor furnace?

— Norma Wichita, KS

Answered by Michael Holcomb on September 6, 2011

Is it worthwhile putting spray foam between joists in my attic ceiling?

— Jim Doylestown, OH

Answered by David Willson on August 3, 2011

Do I need to insulate the floor of a workshop?

— Elizabeth Chester, NY

Answered by Michael Holcomb on July 18, 2011

How can I make my apartment more energy efficient without making permanent changes?

— Heather McGregor Flower Mound, TX

Answered by Stacey Cordeiro on July 14, 2011