Filter fits perfect
"Filter fits perfect"
Measuring Length and Width (L x W). (If your filter is not a square, the smallest measurement goes first).
Measure the thickness (Depth) of your filter from front to back.
Put Your measurements together (L x W x D).
A filter’s true dimensions.
Example: 19.75” x 19.75” x 1”
Rounded numbers used by manufacturers.
Example 20” x 20” x 1”
View Detailed InstructionsThe Aerostar 16x25x5 Replacement Furnace Filter for Honeywell FC100A1029 Air Systems features a multi-model fit design (see Additional Specifications for full model list) and is available in multiple MERV filtration levels to suit your lifestyle and needs.
Designed to fit housing units accommodating 16x25x4, 16x25x4.5, and 16x25x5 whole house filters
This whole house air filter is designed for residential use. By providing cleaner air, this filter reduces the risk of allergens in the home. It is effective at capturing particles like dust, pollen and mold spores from the air passing through the filter. It is also designed to be effective at attracting and capturing microscopic particles that can carry bacteria and viruses. This filter lasts for up to 12 months before needing replacement.
Replaces brand and part number:
Actual Dimensions: 15 7/8" x 24 3/4" x 4 3/8"
MERV 8 pleated filters utilize 100% synthetic media. They help capture airborne particles/allergens between 3-10 microns in size and are an ideal upgrade from standard disposable panel filters.
MERV ratings let you know the efficiency and level of filtration that an air filter can handle under normal circumstances. The higher the MERV rating, the finer the particles are that are filtered our of the air in your home. Many air filter retailers use MERV or a similar rating to rate their air filters.
MERV Rating is the primary rating system used in the industry, both domestically and internationally. Established by the American Society of Heating, Refrigerating, and Air Conditioning Engineers, MERV rates a filter’s ability to capture and hold particles and pollutants.
MPR Rating is a rating system developed by 3M. It rates the manufacturer’s Filtrete product line and their ability to capture airborne particles smaller than 1 micron.
FPR Rating is a rating system developed by The Home Depot for brands sold through their stores, including Honeywell. It utilizes a color code and number scale (4 to 10) that closely resembles the MERV rating.
Overall rating: 4.3 / 5 from 10 reviews.
Review topics: [delivery].
"Filter fits perfect"
"Competitive pricing free shipping a big plus"
"I opened one box and the filters look good. I will install one for the heating season. Get back to me in January 2026."
"Took a while to be delivered. Then the measurements are not correct. Had to trim to fit."
"They are exactly as described. I gave a 4 star only because I just started using them. Hopefully in the future I can change that to a 5 star."
"Set of (2) filters needed for another year of no worry, comfort free cool clean air flow in my home during this hot Texas heat. So glad I made the move when I did."
"I change filters twice a year and always used the Lennox, switched to the Aerostar and can not tell any difference, will keep using them."
"Totally satsfied"
"Fast delivery of the needed product, what’s not to like."
"Very responsove and excellent customer service"
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