Filter Hut's 21x24x5 Rheem/Ruud (PD540020) style filters are specifically engineered to replace the original manufacturer Rheem/Ruud 21x24x5 air filters. Filter Hut's air filters are MERV classified to ASHRAE 52.2 test grades ensuring that our filters will filter as good or better than the original manufacturer part number (PD540020) filters. Our filters also come in Odor Ban odor reducing carbon-infused material. *OEM names are used for filter replacement 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: PD540020.
- Quality Filters Envaero brand.
- Engineered to substitute for the OEM filter.
- Preassembled in frame for ease of installation. (No end caps needed, don't need expanded with combs, etc.)
MERV graded to ASHRAE standards.
- Available in Odor Ban odor eliminating carbon-infused properties.
- 2 filters to a case.