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Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust
Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust

Filtrete 18 in. W X 18 in. H X 1 in. 300 MPR Pleated Filter Dust

Traps pollen, dust, and mold spores with 300 MPR electrostatic pleated media sized for standard 18x18x1 slots.
Filtrete MPN 317-4 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $6.99. Our online price is $7.59.
$7.59
Free shipping on orders over $75
Ships within 24 hours · most orders arrive in about 2 business days
Cases of 4 · Order in multiples of 4

Sold by the Case

$30.36 per case of 4

Save $4.56 on orders $75+. Spend $75 or more to unlock 15% off cases plus free shipping — applied automatically at checkout.

Ships as a complete case of 4. Free shipping on orders $75 and up.

About Product Overview

This Filtrete 18x18x1 furnace filter uses electrostatic pleated media rated at 300 MPR to catch everyday airborne particles without restricting airflow through your HVAC system. It's built for regular furnace and air handler upkeep in homes that want better air quality without stepping up to a high-restriction filter.

The cardboard frame holds its shape in the slot, and the pleated design gives it more surface area than a flat filter, so it keeps working between changes.

  • Actual size: 17-4/5" x 17-4/5" x 7/8" (nominal 18x18x1)
  • MPR rating: 300
  • Filters pollen, dust, lint, and mold spores
  • Electrostatic pleated media, cardboard frame
  • Not trimmable; 1 filter per package

The Details Specifications

Brand Filtrete
UPC 051131974968
Case Pack Quantity 4 per case
Retail Unit Quantity 4
Dimensions (L × W × H) 18 × 18 × 4
Weight 2 lbs
Country of Origin NETHERLANDS
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to open the other tab. Everybody does. We'd rather say so than pretend otherwise — so open it. We'll wait.

When you're over there, check four things before you click buy.

01

Who's actually selling it

The brand name is on the listing. A different company is in the seller field. Those aren't the same thing, and the second one is who you're buying from.

02

Whether the warranty survives

Most manufacturers only honor a warranty when the unit came through an authorized dealer. We're authorized for Filtrete. A third-party marketplace seller usually isn't.

03

Where the box came from

Gray-market stock, returns repackaged as new, and outright fakes move through marketplaces constantly. It all looks identical in the photo. It stops looking identical when it fails.

04

Who you call when it breaks

Ours is a phone number with a person behind it who has held this product. M–F, 6 AM – 5 PM Pacific. (866) 469-8556

We're not always the cheapest.

Sometimes you'll find it for less. Sometimes you'll find it for more. On a lot of brands the number is identical everywhere it's sold legitimately — the manufacturer sets a minimum advertised price and every authorized dealer holds it. When a price sits well under that, it's worth asking why before it's worth celebrating.

How pricing actually works
Authorized dealer · Filtrete

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