This 16x25x3 General Aire (4521) compatible filters are specifically engineered to substitue for the OEM General Aire 16x25x3 air filters. Filter Hut's air filters are MERV classified to ASHRAE 52.2 test ratings establishing that our filters will capture particulate as good or better than the OEM part number (4521) air filters. Our air filters can be selected with Odor Ban odor eliminating carbon media. *Company names are used for air filter substitution identification purposes only.
- 16 x 25 x 3 nominal size.
- 15-3/4 x 24-1/4 x 3 actual size.
- Replaces General Aire brand 16x25x3 part number: 4521.
- Quality Filters Envaero brand.
- Specifically designed to replace the original manufacturer filter.
- Preassembled in frame for ease of installation. (Non-expandable, no end caps needed, etc.)
MERV classified to ASHRAE ratings.
- Option of Odor Ban odor isolating carbon-inlayed media.
- 3 air filters per case.