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Duct Leakage Testing - Problem Set 2.2

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Source(s) or Contributor(s)
Pacific Northwest National Laboratory
Question
  1. Under what conditions do the two duct leakage tests need to be conducted?
  2. What is the difference between duct leakage testing at “Rough-In” and testing done “Post-Construction”?
  3. For a home with a single duct system and more than 1,200 square feet of conditioned floor area, what must the total duct leakage be to not have to conduct a duct leakage to the outdoors test?
    1. < 2 CFM25 per 100 ft2 of conditioned floor area.
    2. < 3 CFM25 per 100 ft2 of conditioned floor area.
    3. < 4 CFM25 per 100 ft2 of conditioned floor area.
    4. < 5 CFM25 per 100 ft2 of conditioned floor area.