What is the best green insulation?

— Nancy Wilson San Diego, CA

Answered by Danny Kelly on July 24, 2012

Would a dual pane insulated glass door help against cold air?

— Jerry H. Hopkins, SC

Answered by Joel Hirshberg on July 23, 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