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Honeywell FC100A1011: F100/F200 20x20x4 media filter

Honeywell FC100A1011 is the MERV 11 cartridge for F100/F200 20×20 media cabinets — exact 19⅞ × 19⅞ × 4⅜. Pick a pack below.

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Our pickHoneywell FC100A1011 OEMMERV 11 · Pack of 5$245.00$49.00 per filterLowest verified price per filter (MERV 8–13): $49.00 each, checked 28 OctBuy at Air Quality Honeywell Store

Match & price

Want MERV 13 instead of MERV 11? See the 20x20x4 MERV 13 hub (FC200E1011 and generic 20x20x4 MERV 13 packs; check depth first).

Full answer

Honeywell FC100A1011 is the common MERV 11 OEM cartridge for Honeywell F100 / F200 (and related) 20×20 media cabinets. Published exact size on Air Quality Honeywell Store is 19⅞ × 19⅞ × 4⅜ (19.875 × 19.875 × 4.375). Resideo SKU attributes list Product Height/Length/Width 19.94 × 19.75 × 4.38. It is the 20×20 sister of FC100A1029 (16×25), FC100A1003 (16×20), and FC100A1037 (20×25) — same ~4⅜ depth family, different face. It is not a drop-in for AprilAire 210/213/216 (actual 20.6 × 26.63 × 4), not FC40R/FC313R return-grille media, and not a 1-inch 20x20x1 slot filter. Broader brand tables: 20x20x4 size page.

Quick specs & official dimensions

Quick specs

Field Value
Model Honeywell FC100A1011 (OEM media)
Printed MERV MERV 11
Nominal 20 × 20 × 4
Published exact / actual (AQHS) 19⅞ × 19⅞ × 4⅜ (19.875 × 19.875 × 4.375)
Resideo product dims 19.94 × 19.75 × 4.38 (also printed 19-15/16 × 19-3/4 × 4-3/8)
Cabinets Honeywell F100, F150, F200, F25, F35, F50, F300 (20×20 media path)
Typical change interval 6–12 months (manufacturer band; load shortens it)
Static pressure (published) 0.23 in. w.c. at 500 FPM (AQHS / Resideo)
Fractional efficiency (AQHS) E1=25%, E2=62%, E3=85%

Source: Air Quality Honeywell Store product specs for FC100A1011 (“Exact Dimensions: 19 7/8 × 19 7/8 × 4 3/8”; “Actual Dimensions - 19-7/8" × 19-7/8" × 4-3/8"”), accessed 25 Sep 2026. Resideo FC100A1011/U attributes: For Use With 20×20 F100 and F200; Product Height/Length/Width 19.94 / 19.75 / 4.38; static 0.23 in wc at 500 FPM; MERV 11. Measure the old cartridge if the cabinet is tight — AQHS and Resideo print slightly different face numbers for the same SKU.

Related Honeywell packs (OEM part table)

Related Honeywell Home packs (same ~4.38 depth)

SKU Printed MERV Published actual (in.) Note
FC100A1011 11 19.875 × 19.875 × 4.375 (AQHS); 19.94 × 19.75 × 4.38 (Resideo) OEM F100/F200 20×20 cartridge this page covers
FC200E1011 13 19.875 × 19.875 × 4.375 (AQHS Exact); 19.94 × 19.75 × 4.38 (Resideo) MERV 13 sister, same face — FC200E1011 model page
FC100A1029 11 15.875 × 24.875 × 4.375 16×25 sister — FC100A1029 model page
FC200E1003 13 15.875 × 19.875 × 4.375 (AQHS Actual) 16×20 MERV 13 sister — FC200E1003 model page
FC100A1003 11 15.875 × 19.875 × 4.375 16×20 sister — FC100A1003 model page
FC100A1037 11 19.875 × 24.875 × 4.375 20×25 sister — FC100A1037 model page
FC200E1029 13 15.875 × 24.875 × 4.375 16×25 MERV 13 — FC200E1029 model page
FC100A1052 11 19.875 × 12.5 × 4.375 (AQHS); 19.94 × 12.44 × 4.38 (Resideo) 20×12.5 sister — FC100A1052 model page

Brand dollars for Filtrete / BestAir / Nordic Pure 20×20×4 live on the 20x20x4 money page. This model page keeps a short OEM-focused Buy table only.

What this is not (avoid wrong swaps)

Not AprilAire — and not every “20x20x4”

  • Honeywell FC100A1011 — ~19⅞ × 19⅞ × 4⅜ for Honeywell F100/F200-class 20×20 cabinets.
  • Honeywell FC100A1029 — 15⅞ × 24⅞ × 4⅜ for 16×25 cabinets. Hub: FC100A1029.
  • Honeywell FC100A1003 — 15⅞ × 19⅞ × 4⅜ for 16×20 cabinets. Hub: FC100A1003.
  • Honeywell FC100A1037 — ~19.88 × 24.88 × 4.38 for 20×25 cabinets. Hub: FC100A1037.
  • Honeywell FC200E1029 — MERV 13 charged-media, 16×25 face. Hub: FC200E1029.
  • Honeywell FC200E1037 — MERV 13 charged-media, 20×25 face. Hub: FC200E1037 FC200E1011.
  • Honeywell FC40R / FC313R return-grille media — 3″ top-hat for wall/ceiling grilles, not F100/F200 cabinet media. Hubs: FC40R, FC313R.
  • AprilAire 210 / 213 / 216 — official actual 20.6 × 26.63 × 4. Different face. Compare: AprilAire 210 vs 213, AprilAire 216.
  • Nordic Pure / Filterbuy “20x20x4” — often ~19.5 × 19.5 × 3.63. Shallower than 4⅜. Nordic Pure tells Honeywell 4⅜ owners to use their 20x20x5 Honeywell replacement instead.

Some merchants also file the same ~4.38 Honeywell cartridge under a 20x20x5 label. Match the old cartridge’s printed model or tape-measure depth. Size hubs: 20x20x4 · 20x20x5.

Honeywell humidifier pads (HC-series water panels) are not FC100A1011 media cartridges. Pad guide: humidifier pads.

Sister Honeywell sizes

Sister Honeywell cabinet sizes

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

Why MERV 11?

MERV 11 in context

MERV is ASHRAE 52.2, as summarized by EPA. FC100A1011 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.

Where these prices came from

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/20x20x4/ rather than being copied here stale.

Verified tonight via live product pages: AQHS 1-pack featured $67.50 (product:price amount 67.5; InStock); 2-pack featured $115.00; 4-pack featured $200.00; 5-pack featured $245.00. Amazon genuine FC100A1011 buy-box not verified tonight — omitted, not invented. Do not scrape Filterbuy charts.

Where to buy (all stores)

Where to buy

No ranking. Stock and price change. Match the model number on the old filter or the cabinet door. A 20x20x1 is not a substitute.

Sources

Sources (accessed 25 Sep 2026 ET unless noted)