FilterBySize Furnace and AC filter sizes, actual dimensions, MERV

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14x24x1 air filter: actual size, MERV, and price

A 14x24x1 is a narrower one-inch-class rectangle furnace or AC filter. Buy the printed size 14x24x1. The panel is smaller than 14 by 24 inches — commonly 13.75 × 23.75 × 0.75, with Filtrete closer to 13.81 × 23.81 × 0.78 or 13.68 × 23.68 × 0.81.

Same panel, swapped axes: 24x14x1. We treat 14x24x1 as the canonical label. Order 14x24x1. Do not substitute 14x25x1 or 16x24x1 — 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) 14x24x1 13.75 × 23.75 × 0.75 Honeywell Store product specs (4-pack and 12-pack)
Filtrete 14x24x1 MPR 1000 / MERV 11 14x24x1 13.68 × 23.68 × 0.81 Amazon B07CTPSCVH title “Actual Size 13.68 x 23.68 x 0.81 in”; same-SKU product-dimensions field lists 24 × 14 × 1 (nominal)
Filtrete 14x24x1 MPR 2200 / MERV 13 14x24x1 13.81 × 23.81 × 0.78 Amazon B07CT1TVYJ “exact dimensions” 13.81 × 23.81 × 0.78; same-SKU product-dimensions field lists 13.84 × 23.84 × 0.78
Filtrete 14x24x1 MPR 1500 / MERV 12 14x24x1 13.81 × 23.81 × 0.78 Amazon B07CV3TDSH title “Actual Size 13.81 × 23.81 × 0.78 in”; same-SKU product-dimensions field lists 13.81 × 23.81 × 0.78
Filtrete 14x24x1 MPR 1900 / MERV 13 14x24x1 13.81 × 23.81 × 0.78 Amazon B07FP61339 title “Act Size 13.81x23.81x0.78 in”; same-SKU product-dimensions field lists 13.81 × 23.81 × 0.78
Nordic Pure 14x24x1 pleated 14x24x1 Approximately 13.75 × 23.75 × 0.75 (13¾ × 23¾ × ¾) JB Tools listing for Nordic Pure 14x24x1M8-12 and 14x24x1M13-12

We did not find an Amazon Basics 14x24x1 listing that publishes an actual-size field, so that brand is omitted rather than guessed. Honeywell and Nordic Pure both publish 13.75 × 23.75 for this size. Honeywell 13.75 vs Filtrete 13.81 can matter in a tight slot. Filtrete’s published actuals also disagree with each other by SKU (title vs product-dimensions field). 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 14x24x1 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 14x24x1 Standard Efficiency 8 4 $29.95 $7.49 Honeywell Store
Honeywell 14x24x1 Standard Efficiency 8 12 $82.95 $6.91 Honeywell Store
Nordic Pure 14x24x1 pleated (reseller) 8 12 $84.59 $7.05 JB Tools
Honeywell 14x24x1 High Efficiency 11 4 $38.95 $9.74 Honeywell Store
Honeywell 14x24x1 High Efficiency 11 12 $104.95 $8.75 Honeywell Store
Honeywell 14x24x1 Ultra Efficiency 13 4 $60.95 $15.24 Honeywell Store
Honeywell 14x24x1 Ultra Efficiency 13 12 $170.95 $14.25 Honeywell Store
Nordic Pure 14x24x1 pleated (reseller) 13 12 $107.99 $9.00 JB Tools

Observed range that day for ordinary pleated 14x24x1: about $6.91–$7.49/filter at MERV 8 in multi-packs (Nordic Pure 12-pack $7.05), $8.75–$9.74 at MERV 11 in Honeywell multi-packs, $9.00–$15.24 at MERV 13, with singles costing more than multi-packs. This size is less common than 16x25x1 or 14x25x1. Target listed a Filtrete 14x24x1 MPR 1000 1-pack (A-14554136) and 2-pack (A-51885605); those product pages loaded without a public cart price we could isolate, so those packs are omitted rather than guessed. No Target Filtrete 14x24x1 MPR 1000 6-pack listing found. Walmart Filtrete product pages returned a bot check or no public cart price we recorded from a product URL, so those pack prices are omitted rather than guessed. Amazon Basics had no published 14x24x1 actual-size listing.

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 14x24x1 SKU. A 14x25x1 or 16x24x1 is not a substitute.

Sources (accessed 30 Aug 2026)