HERS and Energy Star Ratings

WF Rogel LLC

 203-212-6159      516-747-1982

As per section 403 of the 2010 New York State Energy Conservation Construction Code, new duct installations must be tested.  The only exception is if the air handler and all ducts are located in conditioned space.  Even if the ducts are located in conditioned space, it is always beneficial to verify duct tightness to confirm that the air is being supplied and returned to the intended areas.

From the 2010 New York State Energy Conservation Construction Code:

403.2.2 Sealing. All ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed.  Joints and seams shall comply with Section M1601.3.1 of the Residential Code of New York State, or, in New York City, the New York City Construction Codes.  Duct tightness shall be verified by either of the following:

  1. Post construction test: Leakage to outdoors shall be less than or equal to 8 cfm per 100 ft2 of conditioned floor area or total leakage less than or equal to 12 cfm per 100 ft2 of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the entire system , including the manufacturer's air handler enclosure.  All register boots shall be taped or otherwise sealed during the test.
  2. Rough-in test:  Total leakage shall be less than or equal to 6 cfm per 100 ft2 of conditioned floor area when tested at a pressure differential of 0.1 inches w.g. (25 Pa) across the roughed in system, including the manufacturer's air handler enclosure.  All register boots shall be taped or otherwise sealed during the test.  If the air handler is not installed at the time of the test, total leakage shall be less than or equal to 4 cfm per 100 ft2 of conditioned floor area.

Duct Testing Requirements in New York State

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