FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

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14x14x1 air filter: actual size, MERV, and price

A 14x14x1 is a one-inch-class square furnace or AC filter. Buy the printed size 14x14x1. The panel is smaller than 14 inches on each face — commonly 13.75 × 13.75 × 0.75, with Filtrete closer to 13.68 × 13.68 × 0.81 or 13.81 × 13.81 × 0.78. Do not substitute 14x20x1 or 14x25x1 — those are different printed sizes.

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) 14x14x1 13.75 × 13.75 × 0.75 Honeywell Store product specs
Amazon Basics 14x14x1 MERV 11 6-pack 14x14x1 13.75 × 13.75 × 0.75 Amazon B088BW62ST title “Actual Size: 13.75" × 13.75" × 0.75"” and “ITEM ACTUAL DIMENSION: 13.75"W × 13.75"L × 0.75"Th”
Filtrete 14x14x1 MPR 1000 / MERV 11 14x14x1 Title: 13.68 × 13.68 × 0.81; dimensions field also 13.81 × 13.81 × 0.81 Amazon B07FQK9126 and B07CTHXGSV — two figures on the same listing family; measure if the slot is tight
Filtrete 14x14x1 MPR 700 / MERV 8 14x14x1 Title: 13.68 × 13.68 × 0.78 (4-pack also 13.688 × 13.688 × 0.78); 6-pack dimensions field 13.68 × 13.68 × 0.78; 4-pack dimensions field lists 14 × 14 × 1 Amazon B0DKZ75QZ1 and B0B1P6KLTW — two figures on the same family; measure if the slot is tight
Filtrete 14x14x1 MPR 1900 / MERV 13 14x14x1 13.81 × 13.81 × 0.78 Amazon B07FNXPGPK title “Act Size 13.81×13.81×0.78 in”; product-dimensions field lists 13.81 × 0.78 × 13.81. Same actual in B00TUDHJ5W 2-pack title
Nordic Pure 14x14x1 pleated 14x14x1 Approximately 13.75 × 13.75 × 0.75 (13¾ × 13¾ × ¾) JB Tools listings for Nordic Pure 14x14x1M8-24, 14x14x1M8-12, 14x14x1M13-24, and 14x14x1M13-12

Honeywell, Amazon Basics, and Nordic Pure all publish 13.75 square for this size. If you currently run those and switch to Filtrete (~13.81 square on several listings, 13.68 on some titles), expect a slightly different 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 (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 14x14x1 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
Nordic Pure 14x14x1 pleated (reseller) 8 24 $194.39 $8.10 JB Tools
Nordic Pure 14x14x1 pleated (reseller) 8 12 $97.19 $8.10 JB Tools
Honeywell 14x14x1 Standard Efficiency 8 12 $117.95 $9.83 Honeywell Store
Honeywell 14x14x1 Standard Efficiency 8 4 $43.95 $10.99 Honeywell Store
Nordic Pure 14x14x1 pleated (reseller) 13 24 $233.99 $9.75 JB Tools
Nordic Pure 14x14x1 pleated (reseller) 13 12 $116.99 $9.75 JB Tools
Honeywell 14x14x1 High Efficiency 11 12 $137.95 $11.50 Honeywell Store
Honeywell 14x14x1 High Efficiency 11 4 $49.95 $12.49 Honeywell Store
Honeywell 14x14x1 Ultra Efficiency 13 12 $170.95 $14.25 Honeywell Store
Honeywell 14x14x1 Ultra Efficiency 13 4 $60.95 $15.24 Honeywell Store

Observed range that day for ordinary pleated 14x14x1: about $8.10/filter at MERV 8 in Nordic Pure 12- and 24-packs, $9.83–$10.99 at Honeywell MERV 8, $11.50–$12.49 at MERV 11, $9.75 at Nordic Pure MERV 13, $14.25–$15.24 at Honeywell MERV 13, with 4-packs costing more per filter than 12- or 24-packs. Target’s Filtrete 14x14x1 MPR 1000 1-pack page (A-14784651) loaded without a public cart price in the fetch, so that pack is omitted rather than guessed. No Filtrete 14x14x1 6-pack was listed at Target. Walmart Filtrete product pages were not used for this price table (Target Filtrete preferred). Amazon Filtrete pages were used for actual-size fields, not for this price table. Amazon Basics 14x14x1 MERV 11 6-pack (B088BW62ST) publishes actual 13.75 × 13.75 × 0.75; that listing is in the actual-size table, not this price table. Nordic Pure’s own 14x14x1 factory cart was not used for this check; the JB Tools figures are reseller snapshots. A 14x14x1 is not a 14x20x1 or a 14x25x1.

Where to buy

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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 14x14x1 SKU. A 14x20x1 or 14x25x1 is not a substitute.

Sources (accessed 30 Aug 2026)