Our 21x24x5 Rheem/Ruud (Protech 540020) compatible air filters are specifically designed to substitue for the original manufacturer Rheem/Ruud 21x24x5 air filters. Our filters are MERV graded to ASHRAE 52.2 test standards establishing that our air filters will function as good or better than the original manufacturer part number (Protech 540020) air filters. These air filters are available in Odor Ban odor eliminating carbon material. *Company names are listed for filter style identification purposes only.
- 21 x 24.5 x 4. 5 nominal size.
- 20-3/4 x 24-1/4 x 4-3/8 actual size.
- Replaces Rheem/Ruud brand 21x24x5 part number: Protech 540020.
- Accumulair Envaero brand.
- Specifically designed to substitute for the original manufacturer filter.
- Preassembled in frame for ease of installation. (Non-expandable, no end caps needed, etc.)
MERV graded to ASHRAE standards.
- Available in Odor Ban odor filtrating carbon-inlayed material.
- 2 air filters per case.