FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

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20x30x1 air filter: actual size, MERV, and price

Printed size 20x30x1 — actual about 19.5 × 29.5 × 0.75 (varies by brand). Pick a pack below.

MERV 13-only pack page: 20x30x1 MERV 13 (Honeywell Ultra, Nordic Pure).

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Our pickAmazon Basics 20x30x1 MERV 11MERV 11 · Pack of 6$42.64$7.11 per filterLowest verified price per filter (MERV 8–11): $7.11 each, checked 17 OctBuy at Amazon

Match & price

Full answer

A 20x30x1 is a one-inch-class rectangle furnace or AC filter. Buy the printed size 20x30x1. The panel is smaller than 20 by 30 inches — Honeywell prints 19.5 × 29.5 × 0.75, Amazon Basics 19.75 × 29.75 × 0.75, Filtrete closer to 19.68–19.88 × 29.68–29.88 × 0.78–0.81, and Nordic Pure about 19.63 × 29.63 × 0.75 (19⅝ × 29⅝ × ¾).

Full answer

Same panel, swapped axes: 30x20x1. We treat 20x30x1 as the canonical label. Order 20x30x1. Do not substitute 20x25x1 — that is a different slot.

Actual dimensions by brand

Actual size by brand

These numbers are copied from manufacturer or merchant product copy, not from a competitor size chart. Thickness is part of the fit: 1-inch racks take ~¾ inch media.

Brand Nominal Published actual (in.) Source
Honeywell 1-inch Standard/High/Ultra Efficiency (MERV 8, 11, and 13) 20x30x1 19.5 × 29.5 × 0.75 Honeywell Store product specs
Amazon Basics 20x30x1 MERV 11 6-pack 20x30x1 19.75 × 29.75 × 0.75 Amazon product title B088BY6ZNQ and bullet “ITEM ACTUAL DIMENSION 19.75"W × 29.75"L × 0.75"Th”
Amazon Basics MERV 5 20x30x1 6-pack 20x30x1 19.75 × 29.75 × 0.75 Amazon B0DQPGMQ7M title “Actual size: 19.75" × 29.75" × 0.75"”; same-SKU product-dimensions field lists 30 × 20 × 1
Filtrete 20x30x1 MPR 1000 / MERV 11 6-pack 20x30x1 19.81 × 29.81 × 0.81 Amazon B07FP5X4HB title “Actual Size 19.81 x 29.81 x 0.81 in”; product-dimensions field lists 29.81 × 0.81 × 19.81
Filtrete 20x30x1 MPR 1000 / MERV 11 2-pack 20x30x1 19.68 × 29.68 × 0.81 Amazon B004Q6FK5Y title “Actual Size 19.68 x 29.68 x 0.81 in”; product-dimensions field lists 29.68 × 19.68 × 0.81
Filtrete 20x30x1 MPR 700 / MERV 8 20x30x1 19.88 × 29.88 × 0.81 Amazon 4-pack B0B1NTQLM3 title “Act. Size 19.88x29.88x0.81 in”; 6-pack B0DKZ2J8L4 title “Actual Size 19.88 x 29.88 x 0.81 in”
Filtrete 20x30x1 MPR 2200 / MERV 13 20x30x1 19.81 × 29.81 × 0.78 Amazon B07FP5RXCR title “Actual Size 19.81x29.81x0.78 in”; bullet “exact dimensions are 19.81 x 29.81 x 0.78”
Filtrete 20x30x1 MPR 1500 / MERV 12 20x30x1 19.62 × 29.62 × 0.78 (title also disagrees with the dimensions field) Amazon B07FNZMPN1 title “Actual Size 19.62 x 29.62 x 0.78 in”; same-SKU product-dimensions field lists 29.81 × 0.78 × 19.81
Nordic Pure 20x30x1 pleated 20x30x1 Approximately 19.63 × 29.63 × 0.75 (19⅝ × 29⅝ × ¾) JB Tools listings for Nordic Pure 20x30x1M8-6 and 20x30x1M13-6

If you currently run Honeywell (19.5 × 29.5) or Nordic Pure (~19.63 × 29.63) and switch to Filtrete (19.68–19.88 × 29.68–29.88), expect a snugger slide-in. Filtrete’s published actuals also disagree with each other by SKU. Measure the old filter if the slot is tight. Full method: how to measure.

MERV 8 vs 11 vs 13 (EPA facts)

MERV 8 vs 11 vs 13 (facts only)

MERV is ASHRAE 52.2, as summarized by EPA. Higher MERV captures a larger share of smaller particles. It also adds resistance. EPA says to pick at least MERV 13 or as high a rating as your system fan and filter slot can accommodate, and to ask an HVAC technician if you are unsure. A 1-inch MERV 13 is not HEPA. We do not claim health outcomes.

MERV EPA average capture efficiency (particle size) Typical 20x30x1 use
8 ≥20% of 1.0–3.0 µm; ≥70% of 3.0–10.0 µm Common pleated replacement when the manual does not call for higher
11 ≥20% of 0.30–1.0 µm; ≥65% of 1.0–3.0 µm; ≥85% of 3.0–10.0 µm Mid-grade 1-inch pleat (Filtrete MPR 1000 is commonly labeled MERV 11)
13 ≥50% of 0.30–1.0 µm; ≥85% of 1.0–3.0 µm; ≥90% of 3.0–10.0 µm Higher-efficiency 1-inch; confirm the furnace/air handler can take the extra pressure drop

Source: U.S. EPA, “What is a MERV rating?”, last updated 14 Jan 2026. Filtrete also prints an MPR number; MPR is 3M’s scale, not MERV. Compare MERV to MERV.

Where these prices came from

Pack prices checked 30 Aug 2026

Amazon rows: re-checked 6 Oct 2026 (US buy-box ZIP 10001); Buy links open the exact listing named in each row. Other merchants keep their own stamps.

The Nordic Pure card prices above are one-time purchase prices re-read on nordicpure.com on 17 Oct 2026. Other figures in this section are public shelf/cart prices we recorded on 30 Aug 2026 unless a later date is given. They are not live. Shipping, subscribe-and-save, and store-only deals will move them. Per-filter math is pack price ÷ count, rounded to the cent.

Observed range on 30 Aug 2026 for ordinary pleated 20x30x1: about $8.58–$9.60/filter at MERV 8 in multi-packs, $8–$13 at MERV 11, $12–$16.50 at MERV 13, with smaller Filtrete packs costing more per filter than Honeywell 12-packs. Amazon Filtrete MPR 700 4-pack (B0B1NTQLM3) returned a bot check with no featured cart price. Amazon Filtrete MPR 2200 6-pack (B07FP5RXCR) was listed as currently unavailable. JB Tools Nordic Pure MERV 13 4-pack fetch timed out. Amazon Basics MERV 8 is a style option on the MERV 11 family; we did not fetch a dedicated 20x30x1 MERV 8 cart price, so that row is omitted. Nordic Pure Buy buttons go through Awin to nordicpure.com. Factory one-time purchase prices for the listed MERV 8 and MERV 13 6-packs were re-checked 12 Oct 2026 on nordicpure.com (every card matched; MERV and pack selected) (pick MERV and pack on the factory page). MERV 8 6-pack $63.99 and MERV 13 6-pack $79.99 both matched on 7 Oct 2026.

Where to buy (all stores)

Where to buy

No ranking. Stock and price change. If the slot is an odd fraction that none of these actual sizes match, measure first — that is not a 20x30x1 SKU. A 20x25x1 is not a substitute.

Sources

Sources (accessed 30 Aug 2026)

  • Amazon US buy-box re-read 17 Oct 2026 (~8:57–9:12pm ET; headless Chrome on our persistent checker profile, en-US, ZIP 10001; no bot check). Main price = regular price anyone pays; a ($X Prime) bracket is shown only where Amazon labelled an exclusive Prime price that night. B088BY6ZNQ $42.64; B004Q6FK5Y $22.72; B07FP5X4HB $59.99.
  • EPA MERV table: epa.gov/indoor-air-quality-iaq/what-merv-rating (updated 14 Jan 2026)
  • Honeywell Store 20x30x1 MERV 8/11/13 pack pages (prices and 19.5×29.5×0.75; each Buy link re-pointed to its exact MERV/pack page, prices re-checked live 28 Sep 2026)
  • Amazon Basics B088BY6ZNQ (6-pack; price $42.64 (re-checked 16 Oct 2026)) and B0DQPGMQ7M actual size fields; Filtrete Amazon B07FP5X4HB (6-pack) and B004Q6FK5Y (2-pack) prices $59.99 and $22.72 respectively (re-checked 16 Oct 2026), B07FP5RXCR (actual 19.81×29.81×0.78; unavailable), B0B1NTQLM3 (title actual; no cart price), and B07FNZMPN1 title
  • JB Tools Nordic Pure 20x30x1M8-6 ($57.59) and 20x30x1M13-6 (19.63×29.63×0.75, $71.99)