TR-8 Duct Leakage Testing
1RCNY IB6
Where the air handler and/or some ductwork is in unconditioned space, duct-leakage testing shall be performed either after rough-in or post-construction to ensure compliance with ECC 403.2.2. Not less than 20% of such ductwork shall be tested.
1RCNY IIB6
For duct systems designed to operate at static pressures in excess of 3 inches w.g. (746 Pa), representative sections, as determined by the progress inspector, totaling at least 25% of the duct area, per ECC 503.2.7.1.3, shall be tested to verify that actual air leakage is below allowable amounts.
Details
SIGN-ON / Inspect / SIGN-OFF (package)How Duct Leakage Testing Works
Duct leakage testing uses a calibrated pressurization fan — commonly called a duct blaster — to pressurize the supply or return duct system to a standard test pressure while all registers are sealed. The measured air flow required to maintain that pressure represents the leakage rate of the duct system. A high leakage rate means conditioned air is escaping into unconditioned spaces such as wall cavities, attic chases, or mechanical rooms, directly wasting energy and degrading system performance.
NYC Class 1 vs. Class 2 requirements:
- Class 1 (1RCNY IB6): Applies when the air handler or any portion of the ductwork is located in unconditioned space. Testing may be performed at rough-in (before insulation is installed) or post-construction. A minimum of 20% of affected ductwork must be tested per ECC Section 403.2.2.
- Class 2 (1RCNY IIB6): Applies to duct systems operating at static pressures exceeding 3 inches w.g. (746 Pa). A progress inspector selects representative sections totaling at least 25% of the duct area for testing per ECC Section 503.2.7.1.3.
How EZTR1 Executes and Documents Testing
EZTR1's certified progress inspectors coordinate duct leakage testing at the appropriate construction phase, witness the pressurization test, and verify that measured leakage rates fall within allowable limits per the approved energy compliance filing. All test results, sampled duct sections, and pass/fail determinations are documented in the TR-8 inspection report filed with the NYC Department of Buildings.
Ready to schedule your TR-8 duct leakage inspection? Contact EZTR1 to coordinate testing at the right construction phase.