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PaleMelanesian · 10-29-08, 10:02 AM

Nice! I think a simple flapper could eliminate the nighttime heat loss problem. Airflow opens it automatically during the day.

10-29-08, 10:02 AM	#3
PaleMelanesian Apprentice EcoRenovator Join Date: Sep 2008 Location: Texas Posts: 118 Thanks: 4 Thanked 10 Times in 9 Posts	Nice! I think a simple flapper could eliminate the nighttime heat loss problem. Airflow opens it automatically during the day.