FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

Home / Sizes / 14x20x1

Size page

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

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.

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

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 (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.

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
Honeywell 14x20x1 Standard Efficiency 8 4 $28.95 $7.24 Honeywell Store
Honeywell 14x20x1 Standard Efficiency 8 12 $76.95 $6.41 Honeywell Store
Nordic Pure 14x20x1 pleated (reseller) 8 12 $79.19 $6.60 JB Tools
Filtrete 14x20x1 MPR 1000 Allergen Defense 11 1 $13.49 $13.49 Target
Filtrete 14x20x1 MPR 1000 11 2 $22.99 $11.50 Target
Honeywell 14x20x1 High Efficiency 11 4 $36.95 $9.24 Honeywell Store
Honeywell 14x20x1 High Efficiency 11 12 $97.95 $8.16 Honeywell Store
Honeywell 14x20x1 Ultra Efficiency 13 4 $60.95 $15.24 Honeywell Store
Honeywell 14x20x1 Ultra Efficiency 13 12 $170.95 $14.25 Honeywell Store
Nordic Pure 14x20x1 pleated (reseller) 13 12 $98.99 $8.25 JB Tools

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. Target listed a Filtrete 14x20x1 MPR 1000 1-pack and 2-pack; the 6-pack product page (A-94713060) loaded without a public price, so that pack is omitted rather than guessed. Walmart Filtrete product pages returned a bot check or no public cart price, so those pack prices are omitted rather than guessed.

Where to buy

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

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 (accessed 30 Aug 2026)