Is it worth having a tankless hot water system installed to replace my old gas water heater?

— Beth Bogetich Saint Clairsville, OH

Answered by Joshua Lloyd on November 7, 2012

Are sealed crawl spaces a good idea?

— Kyle Peterson Springville, UT

Answered by Joshua Lloyd on November 7, 2012

What insulation is recommended for basement walls?

— Martha Rockport, MA

Answered by Erik Henry on October 30, 2012

Is an attic fan a good investment or a waste of money?

— Mary Savage, MD

Answered by Polly Osborne, FAIA, LEED AP on October 29, 2012

Should I add fiberglass or cellulose to my attic insulation?

— Marsha Broomfield, CO

Answered by Edward Wright on October 19, 2012

What is best central heating system for a 1920s bungalow?

— Edward Memphis, TN

Answered by Elizabeth DiSalvo on October 19, 2012