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Duct blaster test
A duct blaster test measures how much air leaks out of the duct system.
Why it matters
Leaky ducts waste energy and can cause comfort problems. This test quantifies the problem so you can decide if duct sealing is worthwhile.
Where people get this wrong
This is different from a blower door test. Duct blaster tests the ducts. Blower door tests the house envelope.
Real-world example
A duct blaster test shows 20% of airflow is lost before it reaches the rooms. Sealing the ducts could significantly improve comfort and efficiency.
Where this hits your build
This affects daily comfort in every room. Problems often show up after move-in when certain rooms run hot, cold, or noisy.
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