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Ductwork shall be tested to the maximum permitted leakage in 1 cubic foot per minute (ft3/min) per 100 square feet [0.0001 (m3/s)/m2] of duct surface area in accordance with SMACNA HVAC Air Duct Leakage Test Manual. Register penetrations shall be sealed during the test. The test shall be conducted with a pressure differential of 0.1 inch water gauge (0.02 kPa) across the tested system.

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