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New Requirements in ASHRAE Residential IAQ Standard

Published by Rachael Factor, May 29, 2013.

ANSI/ASHRAE Standard 62.2-2013, Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings, is the only nationally recognized indoor air quality standard developed solely for residences. It defines the roles of and minimum requirements for mechanical and natural ventilation systems and the building envelope intended to provide acceptable indoor air quality in low-rise residential buildings.

The newly published 2013 version of ASHRAE’s (American Society of Heating, Refrigerating and Air-Conditioning Engineers) residential indoor air quality (IAQ) standard removes the default leakage rate assumption and also requires carbon monoxide alarms.

One of the biggest changes in the standard over the 2010 version was an increase in mechanical ventilation rates to 7.5 cfm per person plus 3 cfm per 100 square feet. This is due to the earlier removal of the earlier default assumption regarding natural infiltration.

Another major change is a requirement for carbon monoxide (CO) alarms in all dwelling units.

Other significant new changes include the removal of the climate limitations on pressurization and depressurization; specifications related specifically to multifamily buildings; and new calculations and weather data for estimating annual leakage based on a blower door test.

To learn more about the new IAQ standard, please click here.

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