[Not adopted by
HCD] 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:
| Lmax | = | CLP0.65 (Equation 603.10.1) |
| 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). |
[HCD 1 & HCD 2] See California
Energy Code Section 150.0(m)(11) for low-rise residential;
and Section 140.4(1) for duct leakage tests
for other residential buildings.