The Blower Door Test

Blower Door Test - Intro

The Blower Door Test method of measuring airtightness has become a standard part of passive house certification.

Measurement setup for Blower Door Test With lightweight buildings, the Blower Door Test procedure is carried out before the cladding is fixed, to allow the rectification of possible weak spots. With solid construction methods, it is done after the building has been rendered.

Prior to extensive renovation, however, it may be useful to a combine the Blower Door Test with thermography, as the latter pinpoints leaks and weak spots.


Blower Door Test movie

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