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Honeywell FC100A1011: F100/F200 20x20x4 media filter
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
| 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 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 | Same 20×20 face class (~4⅜ depth) | F200 MERV 13 sister for the same 20×20 cabinet opening — not verified with a Buy row tonight |
| FC100A1029 | 11 | 15.875 × 24.875 × 4.375 | 16×25 sister — FC100A1029 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 |
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.
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 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 cabinet sizes
Same F100/F200 media family, different face. Open the size page for brand actuals and dated Buy tables.
- 20x20x4 — FC100A1011-class (this page’s size).
- 16x25x4 — FC100A1029-class (model page).
- 16x20x4 — FC100A1003-class (model page).
- 20x25x4 — FC100A1037-class (model page).
- 20x20x5 / 16x25x5 — 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. 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.
OEM pack prices verified 25 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.
We may earn a commission if you buy through links on this page. It does not change the price you pay.
| Listing | MERV | Pack | Price that day | Per filter | Merchant |
|---|---|---|---|---|---|
| Honeywell FC100A1011 OEM | 11 | 2 | $115.00 | $57.50 | Air Quality Honeywell Store |
| Honeywell FC100A1011 OEM | 11 | 1 | $67.50 | $67.50 | Air Quality Honeywell Store |
| Honeywell FC100A1011 OEM | 11 | 4 | $200.00 | $50.00 | Air Quality Honeywell Store |
| Honeywell FC100A1011 OEM | 11 | 5 | $245.00 | $49.00 | Air Quality Honeywell Store |
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. Prefer Target over Walmart when both exist on size pages.
Where to buy
- Air Quality Honeywell Store (OEM) FC100A1011 2-pack (verified $115.00 tonight): 2-pack. Also 1-pack, 4-pack, and 5-pack.
- Amazon Search: Honeywell FC100A1011. Featured NEW buy-box for a specific ASIN was not verified on this page tonight.
- Need the 16×25 sister? Honeywell FC100A1029 (nominal 16×25×4) or MERV 13 FC200E1029.
- Need the 16×20 sister? Honeywell FC100A1003 (nominal 16×20×4).
- Need the 20×25 sister? Honeywell FC100A1037 (nominal 20×25×4).
- Need AprilAire instead? Different actual — start at AprilAire 210 vs 213 or AprilAire 216 (MERV 16).
- Full 20x20x4 brand table Filtrete / BestAir / Nordic Pure rows: /sizes/20x20x4/.
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 (accessed 25 Sep 2026 ET unless noted)
- Air Quality Honeywell Store FC100A1011 1-pack: fc100a1011-20x20-air-filter — featured $67.50; exact 19 7/8 × 19 7/8 × 4 3/8; MERV 11; F100/F150/F200/F25/F35/F50/F300; E1=25% E2=62% E3=85%; static 0.23 at 500 FPM
- Air Quality Honeywell Store FC100A1011 2-pack: fc100a1011-20x20-air-filter-2-pack — featured $115.00
- Air Quality Honeywell Store FC100A1011 4-pack: fc100a1011-20x20-air-filter-4-pack — featured $200.00
- Air Quality Honeywell Store FC100A1011 5-pack: fc100a1011-20x20-air-filter-5-pack — featured $245.00
- Resideo FC100A1011/U attributes PDF: nominal 20×20×4, MERV 11, 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; UPC 085267210188
- Resideo Pro product page: works with F25, F27, F35, F100, F150, F200
- 16×25 sister: /honeywell-fc100a1029/ · 16×20 sister: /honeywell-fc100a1003/ · 20×25 sister: /honeywell-fc100a1037/
- Brand size table: /sizes/20x20x4/
- EPA MERV table: epa.gov/indoor-air-quality-iaq/what-merv-rating