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Duct Leakage Testing - Problem Set 2.2

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.