The best air conditioner coil filter is the one that matches your equipment’s required dimensions and part number. For a Nordyne A-coil, the Filter Everything 15-by-17-inch filter is a targeted replacement; the Air Filter Factory model suits systems calling for part 917763. Buyers seeking a cut-to-fit option can consider Frost King foam, while the beaufan and CTTMEOOB filters are options for specified fan coil systems. Check your unit’s existing filter and model details before ordering.
| Product | Best For | Type |
|---|---|---|
| Filter Everything 15” x 17” | Nordyne A-coil part 921784 | Washable aluminum mesh |
| Air Filter Factory 16” x 19” | Nordyne/Nortek part 917763 | 12-layer aluminum mesh |
| beaufan KFAFK0312LRG | Listed fan coil models | MERV 4, two-pack |
| CTTMEOOB 317659-403 | Listed fan coil models | Washable hog hair media |
| Frost King 15” x 24” | Cut-to-fit air conditioner use | Washable foam |
Filter Everything Nordyne A-Coil Filter
This two-pack is made for HVAC systems requiring Nordyne A-coil filter part 921784, including the listed C8DAM01830U-B model. Each aluminum filter measures 15 by 17 inches by 1/8 inch, so compare those dimensions with the existing filter before buying.
Best for: Owners who need the specified Nordyne replacement and want a reusable aluminum mesh filter. The product is described as washable and made in the USA. Its fixed dimensions make it a more targeted choice than a generic cut-to-fit pad.
Limitation: It is not a universal-size filter. Choose another option if your unit requires a different size or part number.
Air Filter Factory 917763 Mesh Filter
This two-pack is identified as a replacement for Nordyne and Nortek part 917763 and measures 16 by 19 inches. The filters use 12 layers of aluminum mesh and are described as made in the USA. The stated cleaning method is hand washing with mild dish detergent and warm water, followed by rinsing and drying.
Best for: Buyers whose equipment calls for part 917763 and who prefer a washable metal-mesh filter. The part-number match and two-filter package make it a more specific option than general foam media.
Limitation: Do not assume it replaces part 921784 or fits every A-coil. Confirm the required part number and measurements first.
beaufan KFAFK0312LRG Fan Coil Filters
This two-pack is listed as a KFAFK0312LRG (317659-403) replacement, measuring 21.2 by 19.7 inches. The product identifies MERV 4 filtration and lists compatibility with several Bryant, Carrier, Payne, and Trane fan coil models. Its description says it captures dust, debris, pollutants, and pet dander.
Best for: Buyers whose fan coil model and existing filter match the listed part number and size. It is the only option here with a stated MERV rating, which makes it easier to compare on that specific detail.
Limitation: The listed model compatibility is specific. Verify your system’s exact model and filter dimensions rather than relying on brand name alone.
CTTMEOOB Washable Fan Coil Filter
This two-pack is identified as part 317659-403 or KFAFK0312LRG and is listed for selected Trane and Payne fan coil models. It uses washable hog hair media in an aluminum frame. The listed dimensions are 19.75 by 21.5 by 1 inch, so compare all three measurements with your current filter.
Best for: Buyers seeking a reusable media filter for one of the listed fan coil models. The washable design and aluminum frame distinguish it from the beaufan filter, which specifies MERV 4.
Limitation: The product description does not provide a MERV rating. Choose it based on fit and the stated washable-media features, not an assumed filtration level.
Frost King Cut-To-Fit Foam Filter
Frost King’s open-cell foam filter is listed at 15 by 24 inches and 3/16 inch thick. Its product information describes it as washable foam for air conditioners. The rectangular sheet may be suitable when a buyer needs foam that can be sized for an application.
Best for: Buyers looking for a simple foam option rather than a model-specific metal or framed fan coil filter. It is a different category from the precisely sized A-coil replacements above.
Limitation: The listing provides fewer technical details than the other options. Measure the space carefully and confirm that foam is appropriate for your unit before cutting or installing it.
Buying Guide: How to Choose an Air Conditioner Coil Filter
Does the part number match your unit?
Start with the label on the old filter, equipment manual, or manufacturer information. A-coil part 921784 and part 917763 are distinct replacements in this product list. Fan coil part 317659-403 is another specific designation. Similar-looking filters are not necessarily interchangeable.
Which dimensions should you check?
Measure the existing filter’s length, width, and thickness. Compare actual listed measurements, not just a nominal size or brand. A filter that is too large may not fit, while a poor fit can leave gaps. For cut-to-fit foam, check that the material and thickness suit the filter location.
Should you choose washable mesh, foam, or media?
Washable aluminum mesh is a targeted choice for the listed A-coil replacements. Foam offers a cut-to-fit format, but the Frost King listing provides limited filtration details. The beaufan product specifies MERV 4; the CTTMEOOB listing describes washable hog hair media but does not state a MERV rating. Compare only features confirmed in the product information.
How should a reusable filter be maintained?
Follow the instructions supplied with the filter and your HVAC equipment. The Air Filter Factory listing recommends hand washing with mild dish detergent and warm water, then rinsing and allowing the filter to dry. Do not reinstall a washable filter while it is wet.
Frequently Asked Questions
Are air conditioner coil filters universal?
No. Dimensions, thickness, construction, and required part numbers vary by equipment. Match the replacement to the existing filter and unit specifications.
Can I use a cut-to-fit foam filter in an A-coil?
Only if the equipment’s filter location and requirements allow that material and thickness. Confirm fit and suitability before replacing a model-specific filter with foam.
What does MERV 4 mean on the beaufan filter?
MERV 4 is the filtration rating stated in that product’s listing. The other products described here do not all provide a comparable MERV rating.
Can washable filters be reused indefinitely?
The listings describe certain filters as washable and reusable, but they do not establish an unlimited service life. Inspect the filter and follow its care guidance.