Size page
20x23x1 air filter: actual size, MERV, and price
Printed size 20x23x1 — actual about 19.68 × 22.68 × 0.81 (varies by brand). Pick a pack below.
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.
Full answer
A 20x23x1 is a less common one-inch-class furnace or AC filter. Buy the printed size 20x23x1. The panel is smaller than 20 by 23 inches — Filtrete listings print 19.68 × 22.68 × 0.81 (MPR 1000) or 19.69 × 22.69 × 0.81 (MPR 700); the MPR 1900 4-pack title prints 19.68 × 22.68 × 0.78.
Same panel, swapped axes: 23x20x1. We treat 20x23x1 as the canonical label. Order 20x23x1. Do not substitute 20x24x1 or 20x25x1 — those are different printed sizes.
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. Honeywell Store and Amazon Basics do not list a 20x23x1 SKU, so they are omitted here rather than guessed. Nordic Pure’s factory 20x23x1 page exists but did not print a numeric actual in the fetch, and JB Tools 20x23x1 product URLs returned 404, so Nordic Pure is omitted rather than guessed.
| Brand | Nominal | Published actual (in.) | Source |
|---|---|---|---|
| Filtrete 20x23x1 MPR 1000 / MERV 11 | 20x23x1 | 19.68 × 22.68 × 0.81 | Amazon B0F9LSRLH8 title “Actual Size 19.68 x 22.68 x 0.81 in”; product-dimensions field lists 23"L × 20"W × 0.81"Th |
| Filtrete 20x23x1 MPR 700 / MERV 8 | 20x23x1 | 19.69 × 22.69 × 0.81 | Amazon 2-pack titles “Actual Size 19.69 x 22.69 x 0.81 in” |
| Filtrete 20x23x1 MPR 1900 / MERV 13 | 20x23x1 | 19.68 × 22.68 × 0.78 | Amazon B0F9LV4KYL title “Act Size 19.68x22.68x0.78 in”; product-dimensions field lists 23"L × 20"W × 0.78"Th |
Filtrete’s published actuals disagree with each other by SKU (19.68 vs 19.69 on the face; 0.81 vs 0.78 thickness). 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 20x23x1 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
These are public shelf/cart prices we recorded on 30 Aug 2026. 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.
| Listing | MERV | Pack | Price that day | Per filter | Merchant |
|---|
No public cart prices for this size were recorded that day. This size is less common than 20x24x1 or 20x25x1. Honeywell Store product URLs for 20x23x1 MERV 8/11/13 4-pack and 12-pack returned 404, so Honeywell is omitted rather than guessed. JB Tools Nordic Pure 20x23x1 SKU URLs (including 20x23x1M8 and 20x23x1M13 4-/12-/24-pack slugs) returned 404, so those pack prices are omitted rather than guessed. Walmart Filtrete product pages returned a bot check, so those pack prices are omitted rather than guessed. Amazon Filtrete product pages returned a bot check (no public cart price in the fetch); those listings were used for actual-size fields, not for this price table. Amazon Basics had no published 20x23x1 actual-size listing.
Where to buy (all stores)
Where to buy
- Walmart Filtrete 20x23x1 MPR 700 / MERV 8 packs: Filtrete 2-pack listing (other pack counts on the same product family).
- Amazon Search this size: 20x23x1 furnace filter.
- AirFilters.com Custom and stock 20x23x1 cuts: airfilters.com.
- Nordic Pure Factory 20x23x1 configurator (no numeric actual printed in the fetch): nordicpure.com 20x23x1.
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 20x23x1 SKU. A 20x24x1 or 20x25x1 is not a substitute.
Sources
Sources (accessed 30 Aug 2026)
- EPA MERV table: epa.gov/indoor-air-quality-iaq/what-merv-rating (updated 14 Jan 2026)
- Honeywell Store 20x23x1 MERV 8/11/13 4-pack and 12-pack product URLs: 404 (size not listed)
- No public Filtrete cart price
- Amazon Filtrete B0F9LSRLH8 and B0F9LV4KYL titles (actual-size fields); MPR 700 2-pack titles with 19.69×22.69×0.81. No Amazon Basics 20x23x1 actual-size listing found. Amazon product pages did not yield a verified public cart price for this check
- JB Tools Nordic Pure 20x23x1M8 and 20x23x1M13 4-/12-/24-pack product URLs: 404. Nordic Pure factory 20x23x1 configurator loaded without a numeric actual (captcha / empty Actual Size field)
- Walmart Filtrete 20x23x1 MPR 700 2-pack listing 15448057348: bot check; pack price omitted