BPI IDL Practice Questions - BPI Infiltration & Duct Leakage (IDL) Certification Exam

Before setting up a blower door, which of the following preparatory steps must be completed?

Close all exterior windows and doors, and open all interior doors Open all exterior windows to equalize pressure Turn on all exhaust fans in the building Seal all HVAC supply registers with tape

Correct Answer:

Close all exterior windows and doors, and open all interior doors

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