// CODE SNIPPET
407.5 Variable Air Volume
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Variable
air volume systems subjecting the patient to a fluctuating
air movement are not acceptable for airborne infection
isolation rooms, protective environment rooms or those
critically sensitive areas listed in Section 322.0. For nonsensitive
areas, variable air volume systems meeting the
following criteria can be considered:
The VAV system shall comply with code
requirements for outside air, total air, and pressure
relationship through the full range of operation from
minimum to maximum.
The central return or exhaust fan shall be
controlled to accomplish the variable air volume
requirements of the individual rooms served by the
fan as described in Section 407.5.1.3.
Variable air volume for return or exhaust
air shall be accomplished by utilizing an automatic
modulating damper in the return or exhaust air for
each zone. The damper will modulate from full open
to minimum position in conjunction with the supply
air VAV terminal box.
Related Code Sections
407.5 Ventilation Air, Variable Air Volume
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California Mechanical Code 2019 > 4 Ventilation Air > 407.0 Ventilation System Details > 407.5 Variable Air Volume
407.5 Ventilation Air, Variable Air Volume
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California Mechanical Code 2016 > 4 Ventilation Air > 407.0 Ventilation System Details > 407.5 Variable Air Volume
407.5.1.3 Ventilation Air,
Variable air volume for return or exhaust
air shall be accomplished by utilizing an automatic
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California Mechanical Code 2019 > 4 Ventilation Air > 407.0 Ventilation System Details > 407.5 Variable Air Volume > 407.5.1 Variable Air Volume Systems (VAV) > 407.5.1.3
407.5.1 Ventilation Air, Variable Air Volume Systems (VAV)
Variable
air volume systems subjecting the patient to a fluctuating
air movement are not acceptable for airborne infection
isolation rooms ...
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407.5.1 Ventilation Air, Variable Air Volume Systems (VAV)
Variable
air volume systems subjecting the patient to a fluctuating
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California Mechanical Code 2019 > 4 Ventilation Air > 407.0 Ventilation System Details > 407.5 Variable Air Volume > 407.5.1 Variable Air Volume Systems (VAV)