What type of washing machine saves the most water?

— Nunya Suffolk, VA

Answered by Randy Potter on April 13, 2012

Would hallway lighting that uses motion sensors reduce costs in a 288 unit coop?

— Alex Westin Woodhaven, NY

Answered by David Bergman on April 10, 2012

How should I add insulation to my 87 year old house?

— Maria Wichita Falls, TX

Answered by Lucas Johnson on April 3, 2012