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Honeywell FC100A1052: 20x12.5 media filter (MERV 11)

Honeywell FC100A1052 is the MERV 11 cartridge for the odd 20×12.5 media path (F27F1032) — exact 19⅞ × 12½ × 4⅜. Pick a pack below.

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Match & price

Full answer

Honeywell FC100A1052 is the MERV 11 OEM media cartridge for the uncommon 20×12.5 Honeywell media path (Resideo lists For Use With F27F1032). Air Quality Honeywell Store publishes Exact Dimensions 19⅞ × 12½ × 4⅜ (19.875 × 12.5 × 4.375) and Actual Dimensions 19-7/8″ × 12-1/2″ × 4-3/8″. Resideo SKU attributes list Product Height/Length/Width 19.94 × 12.44 × 4.38, nominal 20 × 12.5 × 4. It is the 20×12.5 sister of FC100A1011 (20×20), 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, not FC40R/FC313R return-grille media, not a 1-inch 12x20x1 / 20x12x1 slot filter, and not FC100A1037 (that is 20×25). AQHS product copy sometimes says it “will fit all Honeywell 20x25 media air cleaners” — that line looks like a catalog paste error; trust the printed model on your old cartridge and the Resideo F27F1032 path. Odd-size hub: odd sizes.

Quick specs & official dimensions

Quick specs

Field Value
Model Honeywell FC100A1052 (OEM media)
Printed MERV MERV 11
Nominal 20 × 12.5 × 4 (also sold as 12½ × 20 × 4 / 12.5×20×5 labels)
Published exact / actual (AQHS) 19⅞ × 12½ × 4⅜ (19.875 × 12.5 × 4.375)
Resideo product dims 19.94 × 12.44 × 4.38 (Product Height / Length / Width)
Cabinets / used with Resideo: F27F1032. AQHS also lists F100, F150, F200, F25, F35, F50, F300 media path — measure the old cartridge.
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 FC100A1052 (“Exact Dimensions: 19 7/8 × 12 1/2 × 4 3/8”; “Actual Dimensions - 19-7/8" × 12-1/2" × 4-3/8"”), accessed 28 Sep 2026. Resideo FC100A1052/U attributes PDF: For Use With F27F1032; Product Height/Length/Width 19.94 / 12.44 / 4.38; nominal 20 × 12.5 × 4; static 0.23 in wc at 500 FPM; MERV 11; UPC 085267210225. 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
FC100A1052 11 19.875 × 12.5 × 4.375 (AQHS); 19.94 × 12.44 × 4.38 (Resideo) OEM 20×12.5 cartridge this page covers
FC100A1011 11 19.875 × 19.875 × 4.375 (AQHS); 19.94 × 19.75 × 4.38 (Resideo) 20×20 sister — FC100A1011 model page
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
FC200E1011 13 19.875 × 19.875 × 4.375 20×20 MERV 13 — FC200E1011 model page
FC200E1029 13 15.875 × 24.875 × 4.375 16×25 MERV 13 — FC200E1029 model page
FC200E1037 13 19.875 × 24.875 × 4.375 20×25 MERV 13 — FC200E1037 model page

There is no separate FilterBySize size money page for 20x12.5 yet — this model hub keeps the OEM-focused Buy table. Related odd panels: odd sizes and 1-inch 12x20x1 (different depth).

What this is not (avoid wrong swaps)

Not AprilAire — and not every “20x12” or 20x25

  • Honeywell FC100A1052 — ~19⅞ × 12½ × 4⅜ for the F27F1032 / 20×12.5 media path.
  • Honeywell FC100A1037 — ~19.88 × 24.88 × 4.38 for 20×25 cabinets. Hub: FC100A1037. Do not order 1037 when the old cartridge says 1052.
  • Honeywell FC100A1011 — ~19⅞ × 19⅞ × 4⅜ for 20×20. Hub: FC100A1011.
  • Honeywell FC100A1029 — 15⅞ × 24⅞ × 4⅜ for 16×25. Hub: FC100A1029.
  • Honeywell FC100A1003 — 15⅞ × 19⅞ × 4⅜ for 16×20. Hub: FC100A1003.
  • Honeywell FC200E* MERV 13 charged-media sisters — hubs: FC200E1011, FC200E1029, FC200E1037. No FC200E1052 Buy row verified tonight.
  • Honeywell FC40R / FC313R return-grille media — 3″ top-hat for wall/ceiling grilles. Hubs: FC40R, FC313R.
  • AprilAire 210 / 213 / 216 — official actual 20.6 × 26.63 × 4. Different face. Compare: AprilAire 210 vs 213, AprilAire 216.
  • 1-inch 12x20x1 / 20x12x1 — return-slot filters, not 4⅜ media cartridges. Size page: 12x20x1.

Some merchants also file the same ~4.38 Honeywell cartridge under a 12.5x20x5 label. Match the old cartridge’s printed model or tape-measure depth.

Honeywell humidifier pads (HC-series water panels) are not FC100A1052 media cartridges. Pad guide: humidifier pads.

Sister Honeywell sizes

Sister Honeywell cabinet sizes

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

Why MERV 11?

MERV 11 in context

MERV is ASHRAE 52.2, as summarized by EPA. FC100A1052 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 28 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. AQHS does not list a single-filter FC100A1052 PDP tonight (2 / 4 / 5 packs only) — we do not invent a 1-pack dollar.

Verified tonight via live product pages (headed Chrome CDP): AQHS 2-pack featured $115.00 (product:price amount 115; InStock); 4-pack featured $200.00; 5-pack featured $245.00. Amazon genuine FC100A1052 ASIN buy-box not verified as a clear NEW featured price 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 12x20x1 is not a substitute.

Sources

Sources (accessed 28 Sep 2026 ET unless noted)