Size page
20x30x1 air filter: actual size, MERV, and price
A 20x30x1 is a one-inch-class rectangle furnace or AC filter. Buy the printed size 20x30x1. The panel is smaller than 20 by 30 inches — Honeywell prints 19.5 × 29.5 × 0.75, Amazon Basics 19.75 × 29.75 × 0.75, Filtrete closer to 19.68–19.88 × 29.68–29.88 × 0.78–0.81, and Nordic Pure about 19.63 × 29.63 × 0.75 (19⅝ × 29⅝ × ¾).
Same panel, swapped axes: 30x20x1. We treat 20x30x1 as the canonical label. Order 20x30x1. Do not substitute 20x25x1 — that is a different slot.
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) | 20x30x1 | 19.5 × 29.5 × 0.75 | Honeywell Store product specs |
| Amazon Basics 20x30x1 MERV 11 6-pack | 20x30x1 | 19.75 × 29.75 × 0.75 | Amazon product title B088BY6ZNQ and bullet “ITEM ACTUAL DIMENSION 19.75"W × 29.75"L × 0.75"Th” |
| Amazon Basics MERV 5 20x30x1 6-pack | 20x30x1 | 19.75 × 29.75 × 0.75 | Amazon B0DQPGMQ7M title “Actual size: 19.75" × 29.75" × 0.75"”; same-SKU product-dimensions field lists 30 × 20 × 1 |
| Filtrete 20x30x1 MPR 1000 / MERV 11 6-pack | 20x30x1 | 19.81 × 29.81 × 0.81 | Amazon B07FP5X4HB title “Actual Size 19.81 x 29.81 x 0.81 in”; product-dimensions field lists 29.81 × 0.81 × 19.81 |
| Filtrete 20x30x1 MPR 1000 / MERV 11 2-pack | 20x30x1 | 19.68 × 29.68 × 0.81 | Amazon B004Q6FK5Y title “Actual Size 19.68 x 29.68 x 0.81 in”; product-dimensions field lists 29.68 × 19.68 × 0.81 |
| Filtrete 20x30x1 MPR 700 / MERV 8 | 20x30x1 | 19.88 × 29.88 × 0.81 | Amazon 4-pack B0B1NTQLM3 title “Act. Size 19.88x29.88x0.81 in”; 6-pack B0DKZ2J8L4 title “Actual Size 19.88 x 29.88 x 0.81 in” |
| Filtrete 20x30x1 MPR 2200 / MERV 13 | 20x30x1 | 19.81 × 29.81 × 0.78 | Amazon B07FP5RXCR title “Actual Size 19.81x29.81x0.78 in”; bullet “exact dimensions are 19.81 x 29.81 x 0.78” |
| Filtrete 20x30x1 MPR 1500 / MERV 12 | 20x30x1 | 19.62 × 29.62 × 0.78 (title also disagrees with the dimensions field) | Amazon B07FNZMPN1 title “Actual Size 19.62 x 29.62 x 0.78 in”; same-SKU product-dimensions field lists 29.81 × 0.78 × 19.81 |
| Nordic Pure 20x30x1 pleated | 20x30x1 | Approximately 19.63 × 29.63 × 0.75 (19⅝ × 29⅝ × ¾) | JB Tools listings for Nordic Pure 20x30x1M8-6 and 20x30x1M13-6 |
If you currently run Honeywell (19.5 × 29.5) or Nordic Pure (~19.63 × 29.63) and switch to Filtrete (19.68–19.88 × 29.68–29.88), expect a snugger 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 20x30x1 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 20x30x1 Standard Efficiency | 8 | 4 | $37.95 | $9.49 | Honeywell Store |
| Honeywell 20x30x1 Standard Efficiency | 8 | 12 | $102.95 | $8.58 | Honeywell Store |
| Nordic Pure 20x30x1 pleated (reseller) | 8 | 6 | $57.59 | $9.60 | JB Tools |
| Amazon Basics 20x30x1 MERV 11 | 11 | 6 | $47.69 | $7.95 | Amazon |
| Filtrete 20x30x1 MPR 1000 | 11 | 2 | $22.72 | $11.36 | Amazon |
| Honeywell 20x30x1 High Efficiency | 11 | 12 | $138.95 | $11.58 | Honeywell Store |
| Honeywell 20x30x1 High Efficiency | 11 | 4 | $49.95 | $12.49 | Honeywell Store |
| Filtrete 20x30x1 MPR 1000 | 11 | 6 | $79.99 | $13.33 | Amazon |
| Nordic Pure 20x30x1 pleated (reseller) | 13 | 6 | $71.99 | $12.00 | JB Tools |
| Honeywell 20x30x1 Ultra Efficiency | 13 | 12 | $186.95 | $15.58 | Honeywell Store |
| Honeywell 20x30x1 Ultra Efficiency | 13 | 4 | $65.95 | $16.49 | Honeywell Store |
Observed range that day for ordinary pleated 20x30x1: about $8.58–$9.60/filter at MERV 8 in multi-packs, $8–$13 at MERV 11, $12–$16.50 at MERV 13, with smaller Filtrete packs costing more per filter than Honeywell 12-packs. Target listed Filtrete 20x30x1 MPR 1000 1-pack (A-13708047), 2-pack (A-15113347), and 6-pack (A-94713087), but those product pages loaded without a public price, so those packs are omitted rather than guessed. Amazon Filtrete MPR 700 4-pack (B0B1NTQLM3) returned a bot check with no featured cart price. Amazon Filtrete MPR 2200 6-pack (B07FP5RXCR) was listed as currently unavailable. JB Tools Nordic Pure MERV 13 4-pack fetch timed out. Amazon Basics MERV 8 is a style option on the MERV 11 family; we did not fetch a dedicated 20x30x1 MERV 8 cart price, so that row is omitted.
Where to buy
We may earn a commission if you buy through links on this page. It does not change the price you pay.
- Honeywell Store Current 1-inch 20x30x1, actual 19.5 × 29.5 × 0.75. Example: MERV 11 12-pack.
- Walmart Filtrete 20x30x1 MPR 1000 / MERV 11 packs: Filtrete 2-pack listing (other pack counts on the same product family).
- Target Same Filtrete 6-pack: Target A-94713087. 2-pack: Target A-15113347.
- Amazon Search this size: 20x30x1 furnace filter. Example with a published actual: Filtrete MPR 1000 2-pack.
- Home Depot Category for this size (pickup): 20x30x1 air filters.
- AirFilters.com Custom and stock 20x30x1 cuts: airfilters.com.
- Nordic Pure Reseller listing with published actual 19.63 × 29.63 × 0.75: JB Tools 20x30x1M8-6.
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 20x30x1 SKU. A 20x25x1 is not a substitute.
Sources (accessed 30 Aug 2026)
- EPA MERV table: epa.gov/indoor-air-quality-iaq/what-merv-rating (updated 14 Jan 2026)
- Honeywell Store 20x30x1 MERV 8/11/13 pack pages (prices and 19.5×29.5×0.75)
- Target Filtrete MPR 1000 20x30x1 1-pack A-13708047, 2-pack A-15113347, 6-pack A-94713087 listed; no public price in the fetch
- Amazon Basics B088BY6ZNQ ($47.69 6-pack) and B0DQPGMQ7M actual size fields; Filtrete Amazon B07FP5X4HB ($79.99 6-pack), B004Q6FK5Y ($22.72 2-pack), B07FP5RXCR (actual 19.81×29.81×0.78; unavailable), B0B1NTQLM3 (title actual; no cart price), and B07FNZMPN1 title
- JB Tools Nordic Pure 20x30x1M8-6 ($57.59) and 20x30x1M13-6 (19.63×29.63×0.75, $71.99)