FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

Home / Sizes / 20x25x4 / MERV 13

Size × MERV

20x25x4 MERV 13: pack prices & where to buy

Printed size 20x25x4, MERV 13 only. Check the depth of your old filter first: most 20x25x4 packs are about 3-5/8 to 3-3/4 inches deep (actual ~19.5 × 24.5), while Honeywell FC200E1037 and Filtrete deep-pleat cartridges are 4.31–4.38 inches. Lowest per filter on 28 Oct: Simply 20x25x4 MERV 13 6-pack on Amazon at $15.82 (back in stock).

We may earn a commission if you buy through links on this page. It does not change the price you pay.

As an Amazon Associate I earn from qualifying purchases.

Our pickAerostar 20x25x4 MERV 13MERV 13 · Pack of 6$120.99$20.17 per filterLowest verified price per filter (MERV 13): $20.17 each, checked 28 OctBuy at Amazon

Match & price

Honeywell F100/F200 media cabinet? Its MERV 13 cartridge is the 4-3/8-inch FC200E1037 — see the FC200E1037 page. AprilAire 2210/2410 cabinet? See AprilAire 210 vs 213. All MERV levels: 20x25x4 size page.

Full answer

A 20x25x4 is a four-inch media filter for a dedicated cabinet. This page is only the MERV 13 slice of that size. On 22 Oct 2026 we read five MERV 13 listings on Amazon, the Nordic Pure MERV 13 menu on nordicpure.com (via Awin) and the Honeywell FC200E1037 packs on the Air Quality Honeywell Store. For a standard 4-inch rack (filters about 3-5/8 to 3-3/4 inches deep), the cheapest per filter on 28 Oct was the Simply 6-pack at $94.93 ($15.82 each; back in stock after showing out of stock from 25 to 27 Oct), then the Aerostar 6-pack at $120.99 ($20.17 each). Next came the Filterbuy 4-pack ($95.36, $23.84 each), the Nordic Pure 6-pack direct ($169.99, $28.33 each) and the BNX TruFilter 2-pack ($56.69, $28.35 each). If your cabinet takes a deeper 4-3/8-inch cartridge (Honeywell F100/F200 style), look at the Honeywell FC200E1037 ($290.00 for a 4-pack, $72.50 each, at the Honeywell Store) or the 4.31-inch Filtrete MPR 1900 2-pack ($73.24, $36.62 each). All MERV levels: the parent 20x25x4 size page.

Price check notes

Amazon (persistent checker profile, en-US, ZIP 10001, featured new buy-box, one-time purchase, 22 Oct 2026; each read at ~9:18–9:19pm and again at ~9:22–9:23pm ET, same price on both reads): Simply MERV 13 6-pack B0DP3K9GFB $94.93 (shipped and sold by Amazon.com; limited-time deal, list $129.97; Currently unavailable on all three 25 Oct reads, ~9:16, ~9:24 and ~9:32pm ET, and out of stock through 27 Oct; back in stock at $94.93 on two 28 Oct reads, ~9:16 and ~9:21pm ET, shipped and sold by Amazon.com); Aerostar MERV 13 6-pack B01D94DBNG $120.99 (shipped and sold by Amazon.com, only 5 left; limited-time deal); Filterbuy MERV 13 4-pack B00CJZ8BXC $95.36 (26 Oct; $99.96 before) (shipped and sold by Filterbuy); BNX TruFilter MERV 13 2-pack B0BXFTLVQB $56.69 (sold by BNX TruFilter, ships from Amazon); Filtrete MPR 1900 2-pack B0DCGMK3RD $73.24 (Buy New, shipped and sold by Amazon.com). No Prime-only price was shown. Listings were found in one Amazon search pass (~9:16pm ET). Nordic Pure 20x25x4 (3-5/8) pleated MERV 13, one-time price on nordicpure.com, read 22 Oct 2026 (~9:04pm ET): 6-pack $169.99, 2-pack $62.99 (1-pack $36.99; no other MERV 13 pack sizes offered). Air Quality Honeywell Store FC200E1037 4-pack $290.00 and 2-pack $165.00 (1-pack $94.50), product pages read 22 Oct 2026 (~9:04pm and again ~9:25pm ET, same price, in stock).

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-inch filter has much more pleat area than a 1-inch panel, so MERV 13 usually adds less airflow resistance in a media cabinet than it does in a thin slot. Change it on schedule (4-inch media typically lasts several months).

Actual size by brand
  • Simply 20x25x4 MERV 13: 19.5 × 24.5 × 3.63 (Amazon B0DP3K9GFB title; the spec table rounds the depth to 3.6). The listing says it is not compatible with Honeywell cabinets.
  • Aerostar 20x25x4 MERV 13: 19.5 × 24.5 × 3.75 (Amazon B01D94DBNG, “Actual size 19.50 x 24.50 x 3.75”).
  • Filterbuy 20x25x4 MERV 13: 19.5 × 24.5 × 3.63 (Amazon B00CJZ8BXC).
  • BNX TruFilter 20x25x4 MERV 13: 19.5 × 24.5 × 3.63 (Amazon B0BXFTLVQB, “Actual Size: 19 1/2 x 24 1/2 x 3 5/8”).
  • Nordic Pure 20x25x4: 19.5 × 24.5 × 3.63 (nordicpure.com lists it as 20x25x4 (3 5/8)).
  • Filtrete 20x25x4 MPR 1900: 19.75 × 24.62 × 4.31 (Amazon B0DCGMK3RD product dimensions).
  • Honeywell FC200E1037: 19.875 × 24.875 × 4.375 (Air Quality Honeywell Store exact size, as on our FC200E1037 page).

A 3-5/8-inch pack will leave a gap in a Honeywell 4-3/8-inch cabinet, and a 4-3/8-inch cartridge will not slide into a 3-5/8-inch rack. Measure the old filter first: how to measure.

Where to buy (all stores)
  • Amazon — five MERV 13 cards above, read 22 Oct 2026; or 20x25x4 MERV 13 search.
  • Nordic Pure (official, via Awin) — 6-pack and 2-pack cards above, read 22 Oct 2026.
  • Air Quality Honeywell Store — FC200E1037 4-pack and 2-pack cards above, read 22 Oct 2026; more on the FC200E1037 page.
FAQ

Is 20x25x4 the same as 25x20x4? Yes — same panel, axes swapped. It is not a 20x25x1 or a 20x25x5; buy the size printed on your current filter, and match the depth.

Which pack is cheapest per filter? On 28 Oct, the Simply 20x25x4 MERV 13 6-pack ($15.82 per filter), back in stock; the Aerostar 6-pack was $20.17 per filter.

Will a Honeywell FC200E1037 fit my 20x25x4 slot? Only if the slot takes a 4-3/8-inch-deep cartridge (Honeywell F100/F200 style). Most generic 20x25x4 racks take 3-5/8 to 3-3/4 inches.

Sources