Is it more efficient to draw furnace combustion air from outside the home?

— Elyse Perruchon Solon, OH

Answered by Joshua Lloyd on February 13, 2013

Suggestions for retrofitting a 1908 house with insulation?

— Juniper Oakland, CA

Answered by John Rising on February 4, 2013

How / where do I find a HERS Auditor?

— Ron Nixon Berlin, CT

Answered by Sean Lintow Sr on January 28, 2013