RESNET HERS National Rater Test

Which of the following scenarios describes a 'Total Duct Leakage' test?

A test using both a blower door and a duct tester to measure leaks to the attic and crawlspace. A test performed at the rough-in stage before drywall is installed. A test that measures all the air leaking from the duct system, regardless of whether it leaks into conditioned or unconditioned space. A test where the duct system is pressurized to 50 Pa and compared against the building's CFM50 value.

Correct Answer:

A test that measures all the air leaking from the duct system, regardless of whether it leaks into conditioned or unconditioned space.

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