Other
filter grades and styles may be available in this size as a CUSTOM
filter.
20x20x4-3/8 Air Filters Available
Superior Filtration
20" x 20" x 4 - 3/8" Air Filter
Pre-Pleat 40 Air Filters: Designed to replace Honeywell #203721 and #FC100A-1011. Actual dimensions are 19-7/8/" x 19-7/8" x 4-3/8". These are MERV 11 pleated filters.
PrePleat 40 air filters are a commercial/industrial, heavy-duty air filter. MERV 11 Specifications
Standard Filtration
20" x 20" x 4 - 3/8" Air Filter
Pre-Pleat 40 Air Filters: Designed to replace Honeywell #203721 and #FC100A-1011. Actual dimensions are 19-7/8/" x 19-7/8" x 4-3/8". These are MERV 8 pleated filters.
Basic Filtration with added protection from:
Pet Dander
Ragweed Pollen
Mold Spores
Dust Mite Debri
PrePleat 40 air filters are a commercial/industrial, heavy-duty air filter. MERV 8 Specifications
If you have questions about our 20 x 20 x 4-3/8 air filters, please contact us. If you are concerned that a 20x20x4-3/8 air filter will not fit your air conditioner, central air system, or furnace; please visit determining your air filter size. If you are looking for a different size furnace or air filter than 20 x 20 x 4-3/8; please choose a different size from the chart below.
