This item is made to order, non-returnable, and ships within 2-4 business days. 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.
21x39x2 / 39x21x2 Geothermal Air Filter
- MERV 13 rated per ASHRAE test standard 52.2
- The actual dimensions of the filter are 20.5" x 38.5" x 1.75".
- This is a double panel filter. Due to the large face area (length x width), two filters will be taped together to make this size. This is an industry standard practice and does not affect the performance of the filter.
