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20x20x5 MERV 13: pack prices & where to buy

Printed size 20x20x5, MERV 13 only. Lowest per filter on 31 Oct: Filterbuy Honeywell/Lennox-fit 4-pack at $33.74 each. Check your old cartridge depth first: Honeywell/Lennox cabinets take a ~4⅜-inch cartridge (about 19.63 × 19.88 × 4.38), Air Bear-style cabinets a deeper ~4.88–4.94-inch one.

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Our pickFilterbuy 20x20x5 Honeywell/Lennox fitMERV 13 · Pack of 4$134.96$33.74 per filterLowest verified price per filter (MERV 13): $33.74 each, checked 31 OctBuy at Amazon

Match & price

All MERV levels (MERV 8, 12, 13 and 14) and the full fit table: 20x20x5 size page. Honeywell box says 20x20x4? See Honeywell FC200E1011 (MERV 13 OEM) and FC100A1011. A 3⅝-inch pleated 20x20x4 is a different filter: 20x20x4 MERV 13. Thinner slot? See 20x20x2 MERV 13 or 20x20x1 MERV 13.

Full answer

“20x20x5” is a media-cabinet cartridge, not a 1-inch slot filter. Most are Honeywell/Lennox replacements about 4⅜ inches deep (Nordic Pure and Filterbuy print 19.63 × 19.88 × 4.38; BNX TruFilter 19.63 × 19.88 × 4.38 on its 31 Oct listing). Honeywell’s own MERV 13 cartridge for this cabinet, FC200E1011, is often labeled 20x20x4 with the same 4⅜ depth. On 31 Oct 2026 the cheapest MERV 13 per filter was the Filterbuy Honeywell/Lennox-fit 4-pack at $33.74 each. Next: Filterbuy Honeywell/Lennox-fit 3-pack $108.99 ($36.33 each); BNX TruFilter 2-pack $74.96 ($37.48 each); Nordic Pure on Amazon 2-pack $78.84 ($39.42 each); Nordic Pure Honeywell/Lennox 4-pack $159.99 ($40.00 each). The Nordic Pure MERV 13 packs on nordicpure.com were 1-pack $41.99, 2-pack $82.99 ($41.50 each) and 4-pack $159.99 ($40.00 each); Honeywell’s own FC200E1011 was $165.00 for 2 and $290.00 for 4 at the Honeywell store. Match the depth of the cartridge you pull out.

Which cabinet do I have?
  • Honeywell F100 / F150 / F200 20×20 or Lennox Healthy Climate media cabinet: the old cartridge is about 4⅜ inches deep (Honeywell FC100A1011 / FC200E1011, Lennox X0585 class). Buy a “Honeywell/Lennox” 20x20x5 or the Honeywell FC200E1011.
  • Trion Air Bear-style cabinet: the old cartridge is deeper (Air Bear lists 19.75 × 20.75 × 4.94). Buy an “Air Bear” 20x20x5 and check the listed depth.
  • Goodman-class 5-inch cabinet: some 20x20x5 cartridges are about 20.25 × 20.75 × 5.25 and will not fit a 4⅜ slot.

Measure the old cartridge depth before you order: how to measure.

Price check notes

Nordic Pure (nordicpure.com product 20x20x5-air-filter, Honeywell/Lennox 4 3/8 replacement, one-time purchase, read 31 Oct 2026 ~9:00pm ET): MERV 13 1-pack $41.99, 2-pack $82.99 and 4-pack $159.99 (the only MERV 13 pack sizes offered). Honeywell Store (airqualityhoneywellstore.com, FC200E1011 MERV 13, in stock, read 31 Oct 2026 ~9:00pm ET): 2-pack $165.00, 4-pack $290.00. Amazon (persistent checker profile, en-US, ZIP 10001, featured new buy-box, one-time purchase, each listing read twice on 31 Oct 2026 between ~9:00 and ~9:29pm ET, same price both reads): Filterbuy Honeywell/Lennox-fit 4-pack B07RX2KSMX $134.96; Filterbuy Honeywell/Lennox-fit 3-pack B0CRWLZ6NB $108.99; BNX TruFilter 2-pack B0DK9ZVJ79 $74.96; Nordic Pure on Amazon 2-pack B005ESP454 $78.84; Filterbuy Honeywell/Lennox-fit 2-pack B00NVICEJS $81.98; Filterbuy Honeywell/Lennox-fit 1-pack B09RY4XXQ5 $65.99. Coupons and Subscribe & Save prices are not counted.

Why MERV 13?

MERV 13 catches more fine particles (smoke, some bacteria, fine dust) than MERV 8 or 11, per the EPA MERV table. A 4–5-inch media cartridge has far more pleat area than a 1-inch panel, so MERV 13 adds little airflow resistance in these cabinets, and the cartridge usually lasts 6–12 months. Check it when the season changes and replace it when it looks gray.

Actual size by brand
  • Filterbuy Honeywell/Lennox-fit: 19.63 × 19.88 × 4.38 (Honeywell/Lennox cabinets) (Amazon B07RX2KSMX listing).
  • Filterbuy Honeywell/Lennox-fit: 19.63 × 19.88 × 4.38 (Honeywell/Lennox cabinets) (Amazon B0CRWLZ6NB listing).
  • Filterbuy Honeywell/Lennox-fit: 19.63 × 19.88 × 4.38 (Honeywell/Lennox cabinets) (Amazon B00NVICEJS listing).
  • Filterbuy Honeywell/Lennox-fit: 19.63 × 19.88 × 4.38 (Honeywell/Lennox cabinets) (Amazon B09RY4XXQ5 listing).
  • Nordic Pure on Amazon: 19 5/8 × 19 7/8 × 4 3/8 (Honeywell/Lennox cabinets) (Amazon B005ESP454 listing).
  • BNX TruFilter: 19.63 × 19.88 × 4.38 (Amazon listing) (Amazon B0DK9ZVJ79 listing).
  • Nordic Pure 20x20x5 Honeywell/Lennox MERV 13: 19 5/8 × 19 7/8 × 4 3/8 (see the 20x20x5 size page).
  • Honeywell FC200E1011: labeled 20x20x4; Air Quality Honeywell Store lists 19 7/8 × 19 7/8 × 4 3/8 (see FC200E1011).
Where to buy (all stores)
  • Nordic Pure (official, via Awin) — MERV 13 1-, 2- and 4-pack cards above, read 31 Oct 2026.
  • Honeywell Store (airqualityhoneywellstore.com) — genuine FC200E1011 2- and 4-pack cards above, read 31 Oct 2026.
  • Amazon — the cards above, read twice on 31 Oct 2026; or 20x20x5 MERV 13 search.
FAQ

Is 20x20x5 the same as 20x20x4? Sometimes. Honeywell labels its 4⅜-inch FC100A1011 / FC200E1011 cartridges 20x20x4, and most stores sell that cartridge as 20x20x5. But a pleated 20x20x4 about 3⅝ inches deep is a different filter and will rattle in a 4⅜ cabinet. Match the depth of your old cartridge.

Which pack is cheapest per filter? On 31 Oct, the Filterbuy Honeywell/Lennox-fit 4-pack ($33.74 per filter).

Will an Air Bear filter fit my Honeywell or Lennox cabinet? Usually not. The Air Bear cartridge is deeper (about 4.94 inches) and longer on one side (20.75); the Honeywell/Lennox one is about 4⅜ deep. Buy the one that matches your cabinet.

How often do I change a 5-inch MERV 13? Many 4–5-inch media cartridges are rated for about 6–12 months; sooner with pets, smoke or renovation dust. See how often to change.

Sources