Resource Library
Behind the Scenes at the Blower Door Factory: Fan and Manometer Calibration
Video
Overview
Watch this behind the scenes look at Retrotec, where fan and manometer calibration takes place.
Peek behind the curtain at Retrotec, into the calibration process for new and old blower doors and duct testing fans.
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DOE's interactive map shows your state’s progress toward launching its home energy rebates.
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View the index of resources for the Weatherization Assistance Program.