These 20x20x4 Top Tech () replacement filters are specifically engineered to substitue for the OEM Top Tech 20x20x4 filters. Filter Hut filters are MERV tested to ASHRAE 52.2 test standards ensuring that our filters will capture debris as good or better than the original manufacturer part number () air filter. Our air filters also come in Odor Ban odor capturing carbon material. *Company names are used for filter substitution identification purposes only.
- 20 x 20 x 4 nominal size.
- 19-3/8 x 19-3/8 x 3-3/4 actual size.
- Replaces Top Tech brand 20x20x4 part number: .
- Quality Filters Envaero brand.
- Specifically designed to replace the original manufacturer filter.
- Preassembled in frame for ease of installation. (No need for extra combs, end-caps, etc.)
MERV classified to ASHRAE standards.
- Available with Odor Ban odor filtrating carbon-inlayed material.
- 3 filters per case.