This item is made to order, non-returnable, and ships within 2-6 weeks. Please check the actual dimensions listed below prior to ordering.
Notice: Air filters are often cut slightly smaller than the actual measurement during the manufacturing process. A margin of error of up to 1/8" is allowed without negatively affecting the overall fit and performance of the air filter.
21x21x4.5 Whole House Air Cleaner Filter Replacement
- Offers an economical alternative to the name-brand filter without compromising air quality or efficiency.
- Actual dimensions of the filters are 20-3/4" x 20-3/4" x 4-3/8".
- MERV 11 rated per ASHRAE test standard 52.2.
