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Standard 62.1: A VAV Dynamic Reset Approach
ASHRAE Standard 62.1 “Ventilation for Acceptable Indoor Air Quality,” provides minimum design requirements for proper ventilation in commercial, institutional and hi-rise residential buildings. It allows optional “dynamic reset” controls to help match current system ventilation capacity to current load, but leaves design details for such controls to the designer. ASHRAE Standard 90.1 and ASHRAE Standard 189.1, on the other hand, both require demand controlled ventilation (DCV) for some zones, but they too, leave out design details. While relatively simple for single-zone systems, DCV can be much more complex for multiple-zone systems.