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Where a forced air HVAC system is used during construction, new return air filters shall be installed prior to system flush out and building occupancy.
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605.1 Duct Systems, General
Heating and air-conditioning systems shall be provided with approved air filters. Filters shall be installed such that all return air, outdoor air ...
606.2.1 Duct Systems, Return Air Systems
Smoke detectors shall be installed in return air systems with a design capacity greater than 2,000 cfm (0.9 m3/s), in the return air duct or plenum ...
6.4 Systems and Equipment, Filtration
Filtration of mechanically supplied air shall be provided as follows: Particulate matter filters, minimum MERV-8, shall be provided upstream ...