FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

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14x20x1 air filter: actual size, MERV, and price

Printed size 14x20x1 — actual about 13.75 × 19.75 × 0.75 (varies by brand). Pick a pack below.

MERV 13-only pack page: 14x20x1 MERV 13 (Honeywell Ultra and Nordic Pure).

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Our pickHoneywell 14x20x1 Standard EfficiencyMERV 8 · Pack of 12$76.95$6.41 per filterLowest verified price per filter (MERV 8–11): $6.41 each, checked 17 OctBuy at Honeywell Store

Match & price

Full answer

A 14x20x1 is a narrower one-inch-class furnace or AC filter. Buy the printed size 14x20x1. The panel is smaller than 14 by 20 inches — commonly 13.75 × 19.75 × 0.75, with Filtrete closer to 13.81 × 19.81 × 0.81 or 13.68 × 19.68 × 0.81 and Nordic Pure about 13.5 × 19.5 × 0.75.

Full answer

Same panel, swapped axes: 20x14x1. We treat 14x20x1 as the canonical label. Order 14x20x1.

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) 14x20x1 13.75 × 19.75 × 0.75 Honeywell Store product specs (4-pack and 12-pack)
Amazon Basics 14x20x1 MERV 8 6-pack 14x20x1 13.75 × 19.75 × 0.75 Amazon product title B088BY7X8P “Actual Size: 13.75" × 19.75" × 0.75"”
Amazon Basics MERV 5 14x20x1 6-pack 14x20x1 13.75 × 19.75 × 0.75 Amazon product title B0DQP7DV7K “Actual size: 13.75" × 19.75" × 0.75"”
Filtrete 14x20x1 MPR 1000 / MERV 11 14x20x1 13.81 × 19.81 × 0.81 Amazon Filtrete store 4-pack and 6-pack titles “Actual Size 13.81x19.81x0.81 in”; B005GZ964A and B07FP5X6XL product-dimensions fields list 13.81 × 19.81 × 0.81
Filtrete 14x20x1 MPR 1000 / MERV 11 (some listings) 14x20x1 13.68 × 19.68 × 0.81 Amazon B004Q67B24, B005GZ964A, and B07FP5X6XL titles “Actual Size 13.68 × 19.68 × 0.81 in”; B004Q67B24 product-dimensions field lists 19.78 × 13.78 × 0.84
Filtrete 14x20x1 MPR 300 / MERV 5 14x20x1 13.81 × 19.81 × 0.81 Amazon B07FNW9VTN “exact dimensions”
Filtrete 14x20x1 MPR 1500 / MERV 12 14x20x1 13.62 × 19.62 × 0.78 Amazon B07FP5RXBF title “Actual Size 13.62 × 19.62 × 0.78 in”; same-SKU product-dimensions field lists 13.81 × 19.81 × 0.78
Nordic Pure 14x20x1 pleated 14x20x1 Approximately 13.5 × 19.5 × 0.75 (13½ × 19½ × ¾) JB Tools listing for Nordic Pure 14x20x1M8-12 and 14x20x1M13-12

If you currently run Nordic Pure (~13.5 × 19.5) and switch to Honeywell or Amazon Basics (13.75 × 19.75), expect a snugger slide-in. Honeywell 13.75 vs Filtrete 13.81 can matter in a tight slot. 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 14x20x1 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.

Observed range that day for ordinary pleated 14x20x1: about $6.41–$7.24/filter at MERV 8 in multi-packs (Nordic Pure 12-pack $6.60), $8.16–$9.24 at MERV 11 in Honeywell multi-packs (Filtrete 1-pack $13.49; 2-pack $11.50), $8.25–$15.24 at MERV 13, with singles costing more than multi-packs. This size is less common than 16x25x1 or 16x20x1. Walmart Filtrete product pages returned a bot check or no public cart price, so those pack prices are omitted rather than guessed. Nordic Pure Buy buttons go through Awin to nordicpure.com. Factory cart pack prices for listed MERV 8 and MERV 13 12-packs were verified 15 Sep 2026 and re-checked 12 Oct 2026 on nordicpure.com (one-time purchase price; same dollars).

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 14x20x1 SKU. A 14x25x1 or 16x20x1 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 14x20x1 MERV 8/11/13 pack pages (prices and 13.75×19.75×0.75; each Buy link re-pointed to its exact MERV/pack page, prices re-checked live 28 Sep 2026)
  • Amazon Basics B088BY7X8P and B0DQP7DV7K actual-size fields. Filtrete Amazon B07FNW9VTN, B004Q67B24, B005GZ964A, B07FP5X6XL, and B07FP5RXBF titles (actual-size fields)
  • JB Tools Nordic Pure 14x20x1M8-12 ($79.19) and 14x20x1M13-12 (13.5×19.5×0.75, $98.99)