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Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter
Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter

Filtrete 18 in. W X 18 in. H X 1 in. Polypropylene 1000 MPR Pleated Air Filter

Electrostatic pleated design with a 1000 MPR rating catches dust, pollen, smoke, and mold spores in one standard-size filter.
Filtrete MPN 9817-4 In Stock & Ready to Ship
$59.96
$14.99 each · sold by the case of 4 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

$59.96 per case of 4

Save $9.00 on orders $75+. Spend $75 or more to unlock 15% off every case — applied automatically at checkout. Free shipping at $75.

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

About Product Overview

This Filtrete 18x18x1 furnace filter carries a 1000 MPR rating, an electrostatic pleated filter built to catch a wide range of household particles moving through your HVAC system. It's a good fit for anyone running a standard 1-inch filter slot who wants better air quality without stepping up to a specialty filter. The polypropylene media and cardboard frame hold up through a normal filter cycle, and one filter covers a single change.

  • Size: 18x18x1 (actual 17-4/5 x 17-4/5 x 7/8 inches)
  • MPR Rating: 1000, electrostatic pleated design
  • Filters dust, lint, pollen, smoke, and mold spores
  • Cardboard frame, polypropylene filter material
  • Not trimmable; 1 filter per package

The Details Specifications

Brand Filtrete
Model / MPN 9817-4
UPC 051111098172
Weight 3 lbs
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab
Price check

Go ahead. Check.

You're going to price-check us against Amazon, Home Depot, and Lowe's. Everybody does. Good — open all three tabs. We'll wait. Then look hard at what you're actually being handed over there.

On Amazon, start with these four questions 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

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The big boxes don't care if your hardware store survives.

Amazon, Home Depot, and Lowe's are built to pull every hardware dollar out of your town. When the local shop can't keep the lights on, the counter where somebody actually knew which part you needed goes with it. We're built the other way: real brands so you're never stuck on a marketplace, and a straight answer to buy it down the street when that's the better call. Support independent hardware — it doesn't restock itself.

Why we tell you to shop local
Authorized dealer · Filtrete

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