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RESNET Adopts Formal Interpretation on Restricting Whole-House Fans for Verification of Federal Residential Energy Efficiency Tax Credits

Apr 28, 2016

There was uncertainty by some certified RESNET HERS Raters on how to interpret the definition of whole-house fans in the ANSI/RESNET/ICC Standard 301-2014 and how to treat whole house fans in the verification of homes for the federal residential energy efficiency tax credits.

To clarify how whole-house fans are treated in the ANSI/RESNET/ICC Standard 301 the RESNET Standards Development Committee (SDC) 300 has adopted a formal interpretation on defining the technology:

To be considered a whole-house fan by ANSI/RESNET/ICC 301-2014 the fan must provide an average air exchange rate with the outdoors of at least 5 air changes per hour.

The SDC 300 also adopted an interpretation on treating whole-house for the verification of the federal energy efficiency homes tax credit:

Whole-house fans shall not be included in the tax credit calculations of RESNET

Publication 13-001

To view the formal SDC 300 interpretation go to RESNET Formal Interpretation on Restricting Whole-House Fans