The 20x20x4 air filter is an extended surface pleated filter, which outpaces standard air filters with medium efficiency, and are engineered for lower pressure drop, and extended service life, which reduces HVAC equipment maintenance and energy costs. Filter Hut's 20x20x4 air filter is rated to ASHRAE test standards 52.2, which establishes that the air filter will operate as good or better than original manufacturer 20 x 20 x 4 air filter.
- 20x20x4 nominal size.
- 19.625x19.625x3.5 actual size.
- Pleated design.
MERV graded to ASHRAE classifications.
- 1377 cfm flow rate.
- 6 filters in a case.