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Home Energy September October 2014 : Page 5

LETTERS 1250 Addison Street, Suite 211B, Berkeley, CA 94702 (510)524-5405 contact@homeenergy.org www.homeenergy.org ________________ MY HOME ENERGY AUDIT Bill, the modi cations you made to your house seem worthwhile except for the passive air supply near your woodstove (“My Home Energy Audit,” May/June ’14, online only). Given the size and relative leakiness of your house, you should not need an additional opening in the envelope to supply air for the woodstove. When the stove door is closed, the chimney ow is likely to equal that of a small bath-room fan, and you do not open an air supply every time you turn on a bathroom fan or use the clothes dryer. That air supply is also next to useless for reducing the possibility of smoke spillage, according to research we did many years ago. You buttoned up the house for better energy performance; just close that air supply as well. Don Fugler online Senior Executive Editor Executive Editor Editor Assistant Editor Design & Production Manager Design Associate Technical Editors Alan Meier Iain Walker Jim Gunshinan Macie Melendez Kate Henke Leanne Maxwell Marcus Bianchi Steve Greenberg Courtney Moriarta Chris Stratton Larry Weingarten Contributing Editor Steve Mann Copyeditor Irene Elmer Duke Elliott, Eunice Herren, Bob Scott, Max Sherman Writers This Issue Publisher Office & Advertising Manager Fulfillment Manager Controller Sales & Marketing Associate O ffice Assistant Pro bono Legal Services Tom White Maggie Forti Alana Shindler Jan Elkington Michael Goldstein Brijauanae Bandy Nixon Peabody LLP, Attorneys at Law Home Energy requires all advertisers to provide documentation to support any claims of product ef ciency and performance contained in ads. We welcome companies involved in residential conservation to join this select group. It includes manufacturers of conservation materials, tools, instrumentation, computer software, and ef cient appliances, and providers of technical services, training, and labor. For advertising rates, contact: Maggie Forti, Tel: (510)524-5405 ext. 111, e-mail: mmforti@homeenergy.org. Home Energy is published by Energy Auditor & Retro tter, Incorporated President, Alan Meier Executive Director, Tom White Advertising Author Bill Spohn replies: Don, thanks for the feedback! The main reason for the passive air supply (in my mind) was for comfort. That is, to have the woodstove source combustion air very locally, rather than draw cold outdoor air from the other leaky parts of the house (such as the front door), creating uncomfortable drafts. Even before air sealing, the drafts were present, and I had a hunch it would only get worse. Unscienti c testing (the stocking feet test) says it worked! 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LETTERS

Don Fugler


MY HOME ENERGY AUDIT

Bill, the modifications you made to your house seem worthwhile except for the passive air supply near your woodstove (“My Home Energy Audit,” May/June '14, online only). Given the size and relative leakiness of your house, you should not need an additional opening in the envelope to supply air for the woodstove. When the stove door is closed, the chimney flow is likely to equal that of a small bathroom fan, and you do not open an air supply every time you turn on a bathroom fan or use the clothes dryer. That air supply is also next to useless for reducing the possibility of smoke spillage, according to research we did many years ago. You buttoned up the house for better energy performance; just close that air supply as well.

Author Bill Spohn replies:

Don, thanks for the feedback! The main reason for the passive air supply (in my mind) was for comfort. That is, to have the woodstove source combustion air very locally, rather than draw cold outdoor air from the other leaky parts of the house (such as the front door), creating uncomfortable drafts. Even before air sealing, the drafts were present, and I had a hunch it would only get worse. Unscientific testing (the stocking feet test) says it worked!

Read the full article at http://omagdigital.com/article/LETTERS/1787417/221713/article.html.

Steven Winter Associates

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