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This section analyzes ASHRAE Standard 62.1-2004, as it impacts and is influenced by ventilation control requirements, methods and equipment. Operational precision and design reliability are essential to minimize energy usage, when compliance with 62.1 and energy codes are simultaneous goals.
This ANSI-approved standard has been developed by the American Society of Heating, Refrigeration and Air-Conditioning Engineers, Inc. (ASHRAE), under a ‘continuous maintenance’ protocol. The 'official' Standard is comprised of both the most recently published parent document and all current addenda. The latest parent document combines 17 addenda that had been approved subsequent to the original release of the 62-2001 parent document in January 2002. The result is a final version that is substantially different from the basic ventilation standard we have used since 1989.
ASHRAE Standard 62.1 prescribes ventilation rates for acceptable indoor air quality. It should be clear to the building operator and the design professional that the dynamic nature of mechanical ventilation requires dynamic control to insure the continuous maintenance of specific predetermined conditions. As a rate-based standard, continuous airflow measurement should logically be a central component of any effective control strategy to assure acceptable indoor air quality, as recently implemented in the latest public review draft of LEED for New Construction Rating System v2.2 credit requirement EQc1 – “Outdoor Air Delivery Monitoring”.
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