click to enlarge and zoom
Mouse over images for additional views.

Honeywell FC100A1037 Air Filter 20 x 25 x 4.5

SKU#: FC100A1037
List Price: $81.04 Sale Price: $71.62
Product Description

The FC100A series filter is a cardboard frame box style filter made up of a web of fibers (MERV 10). As air passes through the filter media, particulates such as dust, pollen, dander, mold, and bacteria collide with the fibers in the filter and become trapped. Meanwhile, the clean air is allowed to continue through your heating and cooling system and into your home.

Replacement Schedule The media filter must be replaced when pressure drop across the media filter reaches 0.5 in. w.c. (0.1 kPa), or at least annually. If the media air cleaner is installed downstream from an atomizing humidifier or if the installation includes both heating and cooling, more frequent replacement may be necessary. Clogged media must be replaced promptly to avoid restricting airflow and reducing efficiency of the heating/cooling system. Record the replacement date in the space provided on the replacement media filter.

Other Options Honeywell released the POPUP series media as an optional replacement for the FC100A series filters. This new media ships collapsed and a higher efficency (MERV 11) which expands into place with no tools required. The new POPUP style media is wider than the old FC100A series media and WILL NOT work on non-Honeywell air cleaners. If you are interested in the POPUP media click on the related product shown below for additional information.

The filter media is not cleanable and must be replaced a minimum of twice a year, once in the heating season and again in the cooling season. If your home only has heating, the filter must be replaced annually. Please note, if you have shedding pets, or live in a dusty environment, you will need to replace the filter media more often.


19 7/8 (inches)
24 7/8 (inches)
4 3/8 (inch)
MERV Rating:
Indicated on Product
Related Products
Honeywell POPUP2025 Air Filter 20 x 25 x 6

Honeywell POPUP2025 Air Filter 20 x 25 x 6

Sale Price: $71.26

Air Filter 20 x 25 x 6
Collapsible Style

More info & photos

Product Reviews

Add your review of this product Global rating: 4.91 from 11 reviews
Nov 30, 2018
Filter by Don Hollister (Scottsdale Az US)

Excellent product

Jul 30, 2018
Exact filter I needed by Donna Whitefield (Camas WA US)

These are hard to find and I am very happy with the price and delivery

Nov 29, 2017
Air filter for home unit by Ellen S Wakefield (Watauga TX UG)

Like the fact that the filter I need for my Air unit, is available for me to order on line since I cannot get in the retial stores. My unit requres a large filter 20x25x5. When I order you get it right to me. So far I have been very pleased with the products. Wish it cost less.

Nov 20, 2013
Home Filter by P. Stuart (Conroe TX US)

Superb Filter, works like a charm.

Sep 18, 2013
ac filters by eduardo (sica te US)

The product is great. I have to say that one of the two filters got dented during transportation, so I hope it will work properly. Eduardo Sica

Jun 3, 2013
Replacement parts by Richard F. Pecovsky (Virginia Beach Va US)

Jun 8, 2012


Apr 15, 2012
Rating by William F. Butterfield (Spring TX US)

It confused me a bit because it came folded.

Jul 29, 2011
New Furnace filter by Carolyn Trotter (Camarillo CA US)

The filter was easy to assemble and install. It fits my new Lennox furnace just fine. I will order this product again. Thanks for asking.

Jul 11, 2011
FC100A1037 Filter Media by Franklin Bates (Allen Te US)

When UPS brought your package to our door, I thought there had been a mistake. That small box could not possibly hold three (3) Honeywell filters like the ones I have been buying for more than six (6) years. I was amazed to find that the box did, indeed, contain three (3) Honeywell filters that easily "popped out" to full size! Very clever design - it makes it easier for me to handle and transport the filters to the attic for installation in three (3) AC units. Thanks!

Dec 14, 2010
New replacement filter by ( )

Overall, the reordering of my replacement filter was very easy and it was a very quick process.


Ontime Mall

McAfee SECURE sites help keep you safe from identity theft, credit card fraud, spyware, spam, viruses and online scams
Credit Card Accepted

Honeywell Air Cleaner, Humidifier & Control Parts

Same Day Shipping

Special Orders