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Requirements Proposed for ASHRAE 62.1
October 12, 2007

Requirements for systems that use optional demand-controlled ventilation strategies are being proposed for ASHRAE’s ventilation standard.

ANSI/ASHRAE Standard 62.1-2007, Ventilation for Acceptable Indoor Air Quality, sets minimum ventilation rates and other requirements for commercial and institutional buildings.

Seven proposed addenda to the standard currently are open for public comment.

Currently, the dynamic reset section of the standard allows designers to use optional controls to reset outdoor air intake flow and/or zone minimum airflow as conditions within the system change. For instance, it would allow a ventilation-system control approach that alters outdoor air intake flow based on time-of-day, if variations in zone population follow a predictable schedule, according to Dennis Stanke, committee chair.

Proposed addenda to ASHRAE standards are available during public review periods. To read the addenda or to comment, visit

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