// CODE SNIPPET
603.10.1 Duct Leakage Tests
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Ductwork shall be leak-tested in accordance with the SMACNA HVAC Air Duct Leakage Test Manual. Representative sections totaling not less than 10 percent of the total installed duct area shall be tested. Where the tested 10 percent fail to comply with the requirements of this section, then 40 percent of the total installed duct area shall be tested. Where the tested 40 percent fail to comply with the requirements of this section, then 100 percent of the total installed duct area shall be tested. Sections shall be selected by the building owner or designated representative of the building owner. Positive pressure leakage testing shall be permitted for negative pressure ductwork. The permitted duct leakage shall be not more than the following:
(Equation 603.10.1)
Lmax = CLP0.65
Where:
| Lmax | = | maximum permitted leakage, (ft3/min)/100 square feet [0.0001 (m3/s)/m2] duct surface area. |
| CL | = | six, duct leakage class, (ft3/min)/100 square feet [0.0001 (m3/s)/m2] duct surface area at 1 inch water column (0.2 kPa). |
| P | = | test pressure, which shall be equal to the design duct pressure class rating, inch water column (kPa). |