Is it true that tankless water heaters are expensive and complicated to install?
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Green Energy Efficiency Questions
Do hot water recirculation systems work? What kind would you recommend?
— Mei Lie Wong, Santa Clara, CA
My house uses well water, and the water from my tankless heater often runs cold. What's going on?
— Ronald Symecko, Sugar Land, TX
Can I safely re-use old cotton batting for attic insulation?
— Paul Richard, Vancouver, BC, Canada
I need to add insulation beneath my wooden floor. What materials or systems do you recommend?
— Eric Goldfarb, Belmont, CA
Should we insist that our contractor use expanding foam insulation around our new windows?
— Sally Kieny, Colchester, VT
Which foam insulation is best for the south coast Atlantic region: closed cell or open cell?
— Jud Laird, Miami, FL
Doesn't sprayed insulation tend to settle, leaving areas in the wall where there is no insulation?
— Beth Dyack, Stuart, FL
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