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Shop Local. Support Independent. 312 products available
Furnace Filters

Shop 338 furnace filters at National Hardware Group — from trusted brands like 3M, Aaf Flanders, Aprilaire and more. Every item is an authorized, warranty-backed purchase, with prices starting around $3.59. Ships nationwide, free over $75 on most items, or find it at your local store.

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312 products
Filtrete Slim 25 in. W X 20 in. H X 4 in. Polyester 1550 MPR Pleated Allergen Air Filter
4 per case

Filtrete

Filtrete Slim 25 in. W X 20 in. H X 4 in. Polyester 1550 MPR Pleated Allergen Air Filter

MPN: NDP03-4S-4

$127.96
Save 15% at $75+ Case of 4
Filtrete 16 in. W X 25 in. H X 5 in. Polypropylene 1550 MPR Pleated Allergen Air Filter
2 per case USA

Filtrete

Filtrete 16 in. W X 25 in. H X 5 in. Polypropylene 1550 MPR Pleated Allergen Air Filter

MPN: NDP01-5IN-2

$77.98
Save 15% at $75+ Case of 2
BestAir 16 in. W X 25 in. H X 4 in. 11 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 16 in. W X 25 in. H X 4 in. 11 MERV Pleated Air Filter

MPN: PFHW1625-11CR

$110.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 20 in. H X 4 in. 8 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 20 in. H X 4 in. 8 MERV Pleated Air Filter

MPN: BA4-2025-8

$44.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 16 in. H X 4 in. 13 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 16 in. H X 4 in. 13 MERV Pleated Air Filter

MPN: HW1625-13R

$125.97
Save 15% at $75+ Case of 3
BestAir 20 in. W X 25 in. H X 4 in. 8 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 20 in. W X 25 in. H X 4 in. 8 MERV Pleated Air Filter

MPN: HW2025-8R

$80.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 16 in. H X 4 in. 11 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 16 in. H X 4 in. 11 MERV Pleated Air Filter

MPN: HW1625-11R

$89.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 20 in. H X 4 in. 13 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 20 in. H X 4 in. 13 MERV Pleated Air Filter

MPN: HW2025-13R

$125.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 16 in. H X 4 in. 8 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 16 in. H X 4 in. 8 MERV Pleated Air Filter

MPN: HW1625-8R

$80.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 20 in. H X 6 in. 11 MERV Pleated Air Filter
2 per case USA

Bestair

BestAir 25 in. W X 20 in. H X 6 in. 11 MERV Pleated Air Filter

MPN: A201-SGM-BOX11R

$77.98
Save 15% at $75+ Case of 2
BestAir 20 in. W X 25 in. H X 5 in. 11 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 20 in. W X 25 in. H X 5 in. 11 MERV Pleated Air Filter

MPN: AB2025-11R

$104.97
Save 15% at $75+ Case of 3
BestAir 20 in. W X 25 in. H X 5 in. 13 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 20 in. W X 25 in. H X 5 in. 13 MERV Pleated Air Filter

MPN: AB2025-13R

$134.97
Save 15% at $75+ Case of 3
BestAir 20 in. W X 25 in. H X 4 in. 11 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 20 in. W X 25 in. H X 4 in. 11 MERV Pleated Air Filter

MPN: HW2025-11R

$89.97
Save 15% at $75+ Case of 3
BestAir 25 in. W X 16 in. H X 4 in. 8 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 25 in. W X 16 in. H X 4 in. 8 MERV Pleated Air Filter

MPN: BA4-1625-8

$44.97
Save 15% at $75+ Case of 3
BestAir 16 in. W X 25 in. H X 5 in. 11 MERV Pleated Air Filter
3 per case USA

Bestair

BestAir 16 in. W X 25 in. H X 5 in. 11 MERV Pleated Air Filter

MPN: AB1625-11R

$104.97
Save 15% at $75+ Case of 3
BestAir 27 in. W X 16 in. H X 6 in. 11 MERV Pleated Air Filter
2 per case USA

Bestair

BestAir 27 in. W X 16 in. H X 6 in. 11 MERV Pleated Air Filter

MPN: A401-SG4-BOX11R

$75.98
Save 15% at $75+ Case of 2
Flanders EZ Flow II 12 in. W X 12 in. H X 1 in. Fiberglass 1 MERV Air Filter
12 per case USA

Flanders

Flanders EZ Flow II 12 in. W X 12 in. H X 1 in. Fiberglass 1 MERV Air Filter

MPN: 10055.011212

$47.88
Save 15% at $75+ Case of 12
Flanders EZ Flow II 14 in. W X 14 in. H X 1 in. Fiberglass 1 MERV Air Filter
12 per case USA

Flanders

Flanders EZ Flow II 14 in. W X 14 in. H X 1 in. Fiberglass 1 MERV Air Filter

MPN: 10055.011414

$47.88
Save 15% at $75+ Case of 12
NaturalAire 20 in. W X 24 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter
12 per case USA

Naturalaire

NaturalAire 20 in. W X 24 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter

MPN: 84858.012024

$91.08
Save 15% at $75+ Case of 12
Flanders EZ Flow II 20 in. W X 20 in. H X 1 in. Fiberglass 1 MERV Air Filter
12 per case USA

Flanders

Flanders EZ Flow II 20 in. W X 20 in. H X 1 in. Fiberglass 1 MERV Air Filter

MPN: 10055.012020

$43.08
Save 15% at $75+ Case of 12
Flanders EZ Flow II 14 in. W X 25 in. H X 1 in. Fiberglass 1 MERV Air Filter
12 per case USA

Flanders

Flanders EZ Flow II 14 in. W X 25 in. H X 1 in. Fiberglass 1 MERV Air Filter

MPN: 10055.011425

$43.08
Save 15% at $75+ Case of 12
NaturalAire 20 in. W X 20 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter
12 per case USA

Naturalaire

NaturalAire 20 in. W X 20 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter

MPN: 84858.012020

$91.08
Save 15% at $75+ Case of 12
Flanders EZ Flow II 16 in. W X 25 in. H X 1 in. Fiberglass 1 MERV Air Filter
12 per case USA

Flanders

Flanders EZ Flow II 16 in. W X 25 in. H X 1 in. Fiberglass 1 MERV Air Filter

MPN: 10055.011625

$47.88
Save 15% at $75+ Case of 12
NaturalAire 16 in. W X 25 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter
12 per case USA

Naturalaire

NaturalAire 16 in. W X 25 in. H X 1 in. Synthetic 8 MERV Pleated Air Filter

MPN: 84858.011625

$91.08
Save 15% at $75+ Case of 12
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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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