Date
Inquiry
It is very difficult to find a MERV-rated filter for HRVs. Can homes with only HRVs (and non-ducted HVAC) get an exemption for IEQ 7.1 B?
Ruling
Heat recovery ventilation (HRV) or energy recovery ventilation (ERV) systems do not need to have MERV-8 air filters. If a home includes a forced-air AHU and an HRV, the AHU must still meet the prerequisite in EQ 7.1.
Updated 10/1/13 for rating system applicability.
Internationally Applicable
Off
Campus Applicable
Off