24x24x1 MERV 13: pack prices & where to buy

Printed size is 24x24x1 — a square 1-inch-class filter. This page is only the MERV 13 slice of that size. The Honeywell Store does not list a 1-inch 24x24x1, so the MERV 13 option we can price is the Nordic Pure MERV 13 factory 2-pack, 3-pack, 4-pack and 6-pack (sold on nordicpure.com; Buy buttons go through Awin). Nominal 24×24×1 is larger than the cut panel: Nordic Pure prints about 23.38 × 23.38 × 0.75 (23⅜ × 23⅜ × ¾), while Filtrete MPR 1900 (MERV 13) 24x24x1 titles print 23.81 × 23.81 × 0.78. Filtrete is the snugger of the two. This is not a 25x25x1 (an inch larger on both sides) or a 20x20x1 (four inches smaller). Measure and compare brands on the parent 24x24x1 size page.

Nordic Pure MERV 13 2-pack $37.99 ($19.00/filter), 3-pack $47.99 ($16.00/filter), 4-pack $58.99 ($14.75/filter) and 6-pack $79.99 ($13.33/filter) are the one-time purchase prices read on nordicpure.com on 16 Oct 2026 (unchanged from our 6 Oct read; the 2- and 6-pack are the same dollars as the parent 24x24x1 page). Each card shows its own last check date; a date is only moved when the factory cart price is actually re-read. Subscribe-and-save is a separate option and is not the card price. The factory link is the 1-inch 24x24x1 product (24x24x1-air-filter-2); Nordic Pure’s other 24x24x1 URL opens a half-inch panel, so we do not link it. Honeywell Store: no 1-inch 24x24x1 product (its 24x24x1 4-pack and 12-pack URLs returned 404 when we built the parent page). No Amazon Buy card: we have not recorded a readable price for a Filtrete MPR 1900 24x24x1 listing, and we do not print a price we have not checked. No Filterbuy chart scrapes.

What MERV 13 means here

MERV is ASHRAE 52.2, as summarized by EPA. MERV 13 is the band EPA cites as ≥50% capture of 0.30–1.0 µm, ≥85% of 1.0–3.0 µm, and ≥90% of 3.0–10.0 µm. A 1-inch MERV 13 is not HEPA. We do not claim health outcomes. Higher MERV adds resistance: a 1-inch MERV 13 typically drops more pressure than MERV 8 or 11 in the same slot. EPA’s upgrade language is 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. Full 8 vs 11 vs 13 table: MERV guide. Filtrete prints an MPR number — MPR 1900 is the Filtrete family labeled MERV 13, MPR 1000 is MERV 11 and MPR 700 is MERV 8; MPR is 3M’s scale, not MERV (see MPR vs MERV).

Actual size by brand

Copied from manufacturer or merchant product copy already cited on the parent 24x24x1 page, not from a competitor size chart.

Switching from Filtrete MPR 1900 (23.81 square) to Nordic Pure (23.38 square) gives you about 0.4 inch more side play and a slightly thinner frame. That is normal for a 1-inch rack, but on a square filter that size the gap can let air slip around the edges: push the filter to one corner so the gap is on two edges only, and keep the door or grille closed tight. Full method: how to measure.

Fit and fan notes

• Face area: a 24x24x1 has 576 square inches nominal (4 sq ft) — more than a 20x25x1 (500), less than a 25x25x1 (625). A big single return spreads MERV 13 resistance over more media than a smaller slot, which helps, but it is still a 1-inch pleat.
• Square, so orientation is only the arrow: 24x24 has no long side to get wrong. Point the airflow arrow toward the blower (into the furnace or air handler).
• Check the old frame: 24x24x1 is common in ceiling and wall return grilles. If the grille opening measures about 24×24 but the old filter says 25x25x1, read the return grille guide before you buy.
• Watch for signs the fan is struggling: a filter bowing toward the blower, whistling at the grille, or rooms that heat or cool noticeably slower after switching to MERV 13. If that happens, go back to MERV 8 or 11 and ask an HVAC technician.
• Change interval: plan on checking a 1-inch MERV 13 monthly at first; dust, pets, and smoke events load finer media faster. See how often.

MERV 13 24x24x1 options

Per-filter math is pack price ÷ count, rounded to the cent. They are not live carts after you leave this page. Shipping, subscribe-and-save, and store-only deals will move them.

• Nordic Pure MERV 13 2-pack vs 3-pack vs 4-pack vs 6-pack: $19.00 vs $16.00 vs $14.75 vs $13.33 per filter. On the 7 Oct prices the 6-pack is the lowest per filter — about $5.67 per filter less than the 2-pack and $1.42 less than the 4-pack. One 6-pack ($79.99) costs less than three 2-packs ($113.97). At a 3-month change, a 4-pack is about a year of single-slot changes, a 6-pack about a year and a half.
• Nordic Pure MERV 8 in the same size: the parent 24x24x1 page lists the MERV 8 2- and 6-packs if MERV 13 is more than your system wants.
• Filtrete: Filtrete sells a 24x24x1 MPR 1900 (MERV 13), but we have not recorded a readable price for it yet, so there is no Filtrete card here.
• Honeywell: not sold in 1-inch 24x24x1 by the Honeywell Store.

Pack math vs cost per year: 6-pack vs 12-pack.

When not to buy MERV 13 in 1-inch

• The furnace or air-handler manual calls for a lower MERV (or a named brand/grade below 13). Follow the equipment, not a search query.
• An HVAC technician says the fan cannot take the extra pressure drop of a 1-inch MERV 13.
• The slot is a 4-inch (or 5-inch) media cabinet. A 1-inch MERV 13 is not a 4-inch media cartridge.
• You actually need 25x25x1 or 20x20x1 — different printed sizes. A 24x24x1 in a 25x25x1 slot leaves about an inch of gap that air bypasses, and a 25x25x1 will not fit a 24x24x1 rack.
• Pets / allergies pressure is real, but choking the fan is worse — start from pets / allergies and how often.

If you are unsure, ask an HVAC technician. EPA’s wording is at least MERV 13 or as high as the fan and slot can accommodate — not “always MERV 13 in every 1-inch rack.”

Where to buy

• Nordic Pure MERV 13 24x24x1 Factory page via Awin (choose MERV 13 and the pack on the page): Nordic Pure 24x24x1. 2-pack $37.99 · 3-pack $47.99 · 4-pack $58.99 · 6-pack $79.99 (last checked 7 Oct 2026).
• AirFilters.com Custom and stock 24x24x1 cuts: airfilters.com.
• Amazon search Amazon: 24x24x1 MERV 13.

Need MERV 8 or 11, or the full brand actual-size table? Go back to 24x24x1. Sister MERV 13 hubs: 14x24x1 MERV 13 · 16x16x1 MERV 13 · 12x24x1 MERV 13 · 12x20x1 MERV 13 · 14x30x1 MERV 13 · 16x30x1 MERV 13 · 18x18x1 MERV 13 · 12x12x1 MERV 13 · 14x20x1 MERV 13 · 14x25x1 MERV 13 · 16x20x1 MERV 13 · 16x24x1 MERV 13 · 16x25x1 MERV 13 · 18x24x1 MERV 13 · 20x20x1 MERV 13 · 20x22x1 MERV 13 · 20x24x1 MERV 13 · 20x25x1 MERV 13 · 20x30x1 MERV 13 · 25x25x1 MERV 13. Guides: measure · how often · MERV · odd sizes · return grille · pets / allergies · MPR vs MERV.

No ranking. Stock and price change. A 1-inch MERV 13 is not a 4-inch media cabinet and is not HEPA.

24x24x1 MERV 13 FAQ

Can I use a 25x25x1 or 20x20x1 instead?

No. A 25x25x1 is about an inch too big on both sides and will not slide in, and a 20x20x1 leaves a four-inch gap for dirty air to bypass. Buy the printed size on your old filter frame.

Which 24x24x1 MERV 13 pack is the best value?

On the 7 Oct 2026 Nordic Pure prices, the 6-pack ($79.99, $13.33 per filter) is the lowest per filter, ahead of the 4-pack ($14.75). Prices move, so check the cards above.

Why is there no Honeywell card?

The Honeywell Store does not list a 1-inch 24x24x1 — its 24x24x1 product URLs returned 404 when we checked.

Is the Nordic Pure subscribe price on the card?

No. Cards show the one-time purchase price. Subscribe-and-save is a separate option on nordicpure.com.

How often should I change a 1-inch MERV 13?

Most 1-inch pleated filters are sold for up to about 3 months of use; finer media can load faster in dusty homes, with pets, or during smoke events. Check it monthly at first. More: how often.