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4.7 Central forced-air HVAC system(s) have minimum MERV 8 filter AND no ozone generators in home

Central forced-air HVAC system(s) should have a minimum MERV 8 filter, AND no ozone generators in home. The following guides provide detailed information on filter specification and installation:

This guide describes the uses, selection process, and specification of high-MERV filters.

This guide describes proper installation of high-MERV furnace and air-handler filters.