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Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter
Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter

Filtrete 20 in. W X 25 in. H X 4 in. Pleated 1000 MPR Pleated Allergen Air Filter

A 1000 MPR electrostatic filter that catches bacteria, viruses, and smoke most standard filters let through.
Filtrete MPN NADP03-4IN-4 In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $24.99. Our online price is $27.99.
$27.99
Ships $39.99 flat · large item
Ships within 24 hours · most orders arrive in about 2 business days
Cases of 4 · Order in multiples of 4
Heavy item · ships $39.99 flat Large items cost more to ship. Prefer to skip it? This is one to grab locally — no box, no shipping. Check your local store below ↓

Sold by the Case

$111.96 per case of 4

Save $16.80 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 20x25x4 furnace filter carries a 1000 MPR rating, built to capture the small stuff that standard filters miss—bacteria, viruses, smoke, and pollen included. The electrostatic pleated media pulls double duty on everyday dust and mold spores, keeping HVAC air moving cleaner through your system without constant filter changes. Cardboard frame holds its shape in the duct, and the actual size runs slightly under nominal, so it's not meant to be trimmed to fit.

  • Air Filter Size: 20x25x4 (Actual: 19-7/8 x 24-5/9 x 4-1/3)
  • MERV/MPR Rating: 1000
  • Electrostatic pleated filter media, cardboard frame
  • Filters bacteria, viruses, smoke, pollen, dust, and mold spores
  • Not trimmable; 1 filter per package

The Details Specifications

Brand Filtrete
UPC 076308870928
Case Pack Quantity 4 per case
Retail Unit Quantity 4
Dimensions (L × W × H) 21 × 19 × 26
Weight 12 lbs
Country of Origin MEXICO
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

Or skip both tabs and buy it down the street. Find a store near you →

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Why we built NHG
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

Ask our counter. Or theirs.

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The stores we send you to are local and independently run — often for generations, the kind of place where someone behind the counter knows the regulars. We don't own them. We just think they deserve the foot traffic. They can put most of what we sell on their next truck. Ask there before you check out here.

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About our directory. National Hardware Group is an independent retailer and directory. The local stores we list and link to are separately owned and operated — we have no ownership stake in any of them, and most pay us nothing to be included. That includes plenty of stores flying a familiar banner that people don't realize are locally owned and run, not operated by a corporation. Store owners can choose to upgrade their listing for an enhanced presence or pickup features, but the base directory is free, and inclusion is never a paid endorsement.

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