This proposed change clarifies that a system must be operated in order to achieve the stated purpose of the standard to define minimum requirements for acceptable indoor air quality. Currently the standard is vague such that a system could be installed and turned off and be in compliance. A non-operating system cannot achieve the air change rate required in Section 4.1 of the standard. Elsewhere in the standard (Section 4.4) it is stated that: 'Readily accessible override control must be provided to the occupant.' This proposed change makes it clear that the override control is modifying or suspending normal operation.
ANSI/ASHRAE 62.2o-2012 history
2012ANSI/ASHRAE 62.2o-2012 Ventilation and Acceptable Indoor Air Quality in Low-Rise Residential Buildings