Honeywell FC100A1037: F100/F200 20x25x4 media filter

Honeywell FC100A1037 is the common MERV 11 OEM cartridge for Honeywell F100 / F200 (and related) 20×25 media cabinets. Published exact size is about 19⅞ × 24⅞ × 4⅜ (19.875 × 24.875 × 4.375 / ~19.88 × 24.88 × 4.38). It is not a drop-in for AprilAire 210/213 (actual 20.6 × 26.63 × 4). MERV 13 sister (same face): FC200E1037 FC200E1011. Related Honeywell Home packs in the same cabinet depth: CF100A1025 (MERV 8) and CF200A1016 (MERV 12). Broader brand tables: 20x25x4 size page.

Quick specs

Source: Air Quality Honeywell Store product specs for FC100A1037 (“Exact Dimensions: 19 7/8 × 24 7/8 × 4 3/8”), accessed 14 Sep 2026. Other merchant copy often prints ~19.94 × 24.86–24.88 × 4.38.

Related Honeywell Home packs (same ~4.38 depth)

Pack dollars for CF100 / CF200 live on the 20x25x4 money page (last full brand recheck 14 Sep 2026). This model page keeps a short OEM-focused Buy table only.

Not AprilAire — and not every “20x25x4”

• Honeywell FC100A1037 — ~19.88 × 24.88 × 4.38 for Honeywell F100/F200-class cabinets.
• Honeywell FC200E1037 — MERV 13 charged-media, same face. Hub: FC200E1037 FC200E1011.
• Honeywell FC40R return-grille media — 3″ top-hat for wall/ceiling grilles (e.g. FC40R1003 / FC40R1011), not F100/F200 cabinet media. Hub: FC40R. MERV 13 sister: FC313R.
• AprilAire 210 / 213 / 216 — official actual 20.6 × 26.63 × 4. Different face and depth. Compare MERV 11/13: AprilAire 210 vs 213. MERV 16: AprilAire 216.
• Nordic Pure “20x25x4” — often ~19.5 × 24.5 × 3.63. Shallower than 4⅜. Nordic Pure tells Honeywell 4⅜ owners to use their 20x25x5 Honeywell replacement (~19.63 × 24.88 × 4.38) instead.

Some merchants also file the same ~4.38 Honeywell cartridge under a 20x25x5 label. Match the old cartridge’s printed model or tape-measure depth — do not assume every 20x25x5 is FC100A1037. Size hubs: 20x25x4 · 20x25x5.

Honeywell HC22 / HC26 humidifier pads are evaporative water panels for whole-house humidifiers — not FC100A1037 media cartridges. Pad guide: humidifier pad sizes.

Sister Honeywell cabinet sizes

Same F100/F200 media family, different face. Open the size page for brand actuals and dated Buy tables.

• 20x25x4 — FC100A1037-class (this page’s size).
• 16x25x4 — FC100A1029-class (model page).
• 20x20x4 — FC100A1011-class (model page).
• 16x20x4 — FC100A1003 / FC200E1003 — FC100A1003-class (model page).
• 16x25x5 / 20x25x5 — labels that sometimes sell the same ~4.38 depth as Honeywell replacements; measure before you order.

MERV 11 in context

MERV is ASHRAE 52.2, as summarized by EPA. FC100A1037 is labeled MERV 11. Higher MERV captures more of the smaller particle bands and adds resistance. A media MERV 11 is not HEPA. We do not claim health outcomes. Full 8 vs 11 vs 13 guide: MERV. Change interval by thickness: how often.

OEM pack prices verified 29 Sep 2026

Public featured prices on Air Quality Honeywell Store product pages tonight. Per-filter math is pack price ÷ count. Shipping will move cart totals. Prefer the verified 2-pack row when comparing multi-packs. Broader Filtrete / BestAir / Nordic Pure tables stay on /sizes/20x25x4/ rather than being copied here stale.

Verified tonight via live product pages: AQHS 2-pack featured $115.00 (product:price amount 115); 1-pack featured $67.50; 4-pack featured $200.00. Amazon genuine FC100A1037 1-pack B003J7JSFY featured NEW one-time buy-box $35.43 (28 Oct; $38.00 before) (re-checked 23 Oct 2026 at ~10:11, ~10:29 and ~10:34pm ET, featured offer from Homegoods Shop; it was $36.54 from Direct Supply Store at ~8:59 and ~9:14pm the same evening; $35.39 on 22 Oct, $35.28 on 12–21 Oct, $35.39 on 8 Oct, $38.00 on 7 Oct, $34.01 through 6 Oct, $40.99 on 23 Sep). Do not scrape Filterbuy charts.

Where to buy

• Air Quality Honeywell Store (OEM) FC100A1037 2-pack (verified $115.00 tonight): 2-pack. Also 1-pack and 4-pack.
• Amazon Genuine FC100A1037 1-pack (verified $35.43, 28 Oct 2026; $38.00 on 27 Oct; $37.68 on 26 Oct; $38.00 on 23 Oct): Amazon B003J7JSFY. Search: Honeywell FC100A1037. Related same-depth Honeywell Home packs (prices not re-verified on this page): CF100A1025 MERV 8.
• Need the MERV 13 sister? Honeywell FC200E1037 (same 20×25 face, MERV 13).
• Need the 20×20 sister? Honeywell FC100A1011 (nominal 20×20×4).
• Need AprilAire instead? Different actual — start at AprilAire 210 vs 213 or AprilAire 216 (MERV 16).
• Full 20x25x4 brand table Filtrete / BestAir / Nordic Pure rows: /sizes/20x25x4/.

No ranking. Stock and price change. Match the model number on the old filter or the cabinet door. A 20x25x1 is not a substitute.