Green Energy Efficiency Questions

Is it worth it to pay for a Phoenix water heater or buy a condensing tankless water heater?

— Yesim Erke-Magent Allentown, PA

Answered by Harris Woodward on August 4, 2010

Are skylights a good idea? My partner says it will admit too much heat in the summer.

— sara Akron, OH

Answered by Harris Woodward on August 3, 2010

Where is it better to install insulation in an old house: inside or outside?

— Felix Gonzalez San Antonio, TX

Answered by Christian Kienapfel | AIA Architect | RA | LEED AP | Dipl.-Ing. Architekt (Germany) on August 3, 2010

Is there a good way to reduce energy loss and associated costs due to frequent use of doors?

— chad senf Huntington Beach, CA

Answered by Paula Zimin on August 3, 2010

Do whole-house surge protectors really work? Which ones will condition the power and save energy? Are they worth it?

— Breana Rondeau Jacksonville, NC

Answered by Rick Goyette on August 2, 2010

What are the electrical costs for running a passive hot water recirculating system with the timer set to off?

— Kathleen Arquette Chandler, AZ

Answered by Philip Proefrock on August 2, 2010

When insulating interior basement walls, do you need to insulate below the frost line? Or does the soil act as a natural insulator?

— paul Sellersburg, IN

Answered by Florian Speier on July 30, 2010

The air flow on the central air is barely cool even at low temperature. What might be wrong?

— Tom Swanton, OH

Answered by Dennis Cheslik on July 30, 2010

My AC service contractor wants to sell me a new unit with environmentally friendly Freon. What does that mean? Should I buy it?

— Ellen Stover Tampa, FL

Answered by Steve Saunders on July 28, 2010

My daughter has gone to college, so her room sits unused. Should we close it off and close the AC vents?

— Earl Bollinger Covington, LA

Answered by Tammy Schwolsky, LEED AP, GPR, HPwES on July 26, 2010

Is it better to use a gas or electric heater to back up a solar hot water heater?

— Marge Stevens Corvallis, OR

Answered by Rich Franz-Ünder on July 22, 2010

We are concerned about possible offgassing from spray-foam insulation for a home under construction.

— Kara Palley Passaic, NJ

Answered by Rick Goyette on July 21, 2010

Would you recommend foam insulation for a tight attic space?

— Ronnie West Hempstead, NY

Answered by Danny Kelly - KMC Green Team on July 16, 2010

I live in a Santa Fe style house, the kind with a flat roof and no attic crawlspace. Is there a way to improve attic insulation?

— Bente Jensen Palm Desert, CA

Answered by Tammy Schwolsky, LEED AP, GPR, HPwES on July 11, 2010

I want a hot water circulator that can operate in on-demand mode and timer mode. Do you know of such a thing?

— Rumi Nakano Alamogordo, NM

Answered by Erik Henry on July 8, 2010

 

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