Building Envelope Practice Test & Exam Prep

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A homeowner reports cold drafts near exterior walls during winter. A blower door test reveals 3,200 CFM50. What is the most likely primary cause of the discomfort?

Excessive air leakage through the building envelope Insufficient insulation R-value in the walls Oversized HVAC equipment causing short cycling Inadequate solar heat gain through windows

Correct Answer:

Excessive air leakage through the building envelope

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