Conduct blower door tests, which in multifamily and hotel applications typically require a sampling of one out of every seven units. See the Home Energy Rating System program (link) for details on sampling rates. For any spaces that do not pass the blower

Conduct blower door tests, which in multifamily and hotel applications typically require a sampling of one out of every seven units. See the Home Energy Rating System program (link) for details on sampling rates. For any spaces that do not pass the blower door pressure test, correct any potential problems and retest, or another space has to be tested until 100 percent of the requisite number of spaces have successfully passed.