These 20x20x4 Top Tech () substitute filters are specifically engineered to substitue for the original manufacturer Top Tech 20x20x4 filters. These air filters are MERV classified to ASHRAE 52.2 test standards establishing that our filters will capture particulate as good or better than the OEM part number () filters. Our air filters have the option of Odor Ban odor eliminating carbon-infused technology. *Brand names are used for air 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: .
- Envaero brand by Accumulair.
- Specifically designed to substitute for the OEM filter.
- Filters framed and preassembled for ease of intallation. (No need for extra combs, end-caps, etc.)
MERV rated to ASHRAE classifications.
- Available with Odor Ban odor filtrating carbon media.
- 3 filters per case.