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Furnace Filters - 132 - Blowout Sale! Save up to 51%


Blowout Sale! Up to 51% off on Furnace Filters at In The National Interest. Top brands include Filtrete, Nordic Pure, BestAir, Goodman, Flanders, Glasfloss, Aerostar, RPS PRODUCTS, 3M Personal Protective Equipment, Aprilaire, True Blue, Accumulair, & FilterBuy. Hurry! Limited time offers. Offers valid only while supplies last.



Filtrete Clean Living Basic Dust Filter, MPR 300, 16 x 25 x 1-Inches, 6-Pack
Filtrete Clean Living Basic Dust Filter, MPR 300, 16 x 25 x 1-Inches, 6-Pack
In Stock
$40.02
$24.74
You Save: 38%
When it comes to your home, you expect things to be neat and clean. You take steps to keep your home clean and in order. Unlike ordinary pleated filters, Filtrete clean living filters are electrostatically charged to help capture more particles from ...


Filtrete MPR 1000 16 x 20 x 1 Micro Allergen Defense AC Furnace Air Filter, Guaranteed Airflow up to 90 days, 2-Pack
Filtrete MPR 1000 16 x 20 x 1 Micro Allergen Defense AC Furnace Air Filter, Guaranteed Airflow up to 90 days, 2-Pack
In Stock
$23.98

mpn: AD00-2PK-6E-NA, ean: 0051141991177,

Filtrete, 2 Pack, 16" x 20" x 1", Micro Allergen Reduction Filter, Attracts & Captures Microscopic Allergens Like Dust, Smoke, & Smog Particles & Large Allergens Like Mold Spores & Pollen, For Residential Use Only.Helps protect your home by reducing ...


Nordic Pure 20x25x1 AC Furnace Air Filters MERV 12, Box of 6
Nordic Pure 20x25x1 AC Furnace Air Filters MERV 12, Box of 6
In Stock
$42.59
$37.73
You Save: 11%

mpn: 20x25x1M12-6, ean: 0816387011306,

The Nordic Pure MERV 12 anti-allergen pleated air filter is the ideal filter to reduce airborne contaminants in your home or business. With each pass through your MERV 12 anti-allergen pleated air filter, the air in your environment improves. This el...


BestAir HW2025-8R Furnace Filter, 20'' x 25'' x 4'', Honeywell Replacement, MERV 8
BestAir HW2025-8R Furnace Filter, 20" x 25" x 4", Honeywell Replacement, MERV 8
In Stock
$46.32

mpn: HW2025, ean: 0791769469961,

BestAir Extreme Allergens, Pollen and Dander Air Cleaning Filter For Honeywell - 20 X 25 X 4 MERV 8. Optimized For Honeywell 20 x 25 x 4 (actual 20 x 24 ⅞ x4 1/4"). Fits Honeywell Air Cleaner Models: F100B1032, F100B1040, F100F1087, F100F1095, F100...


GOODMAN M1-1056 GENUINE ORIGINAL 16x25x5 (Actual Size: 15-3/8 X 25-1/2 X 5-1/4) MERV 11 16X25X5 MEDIA FILTERS CASE OF 3, PRIME OEM PRODUCT.
GOODMAN M1-1056 GENUINE ORIGINAL 16x25x5 (Actual Size: 15-3/8 X 25-1/2 X 5-1/4) MERV 11 16X25X5 MEDIA FILTERS CASE OF 3, PRIME OEM PRODUCT.
In Stock
$75.00

mpn: M1-1056, ean: 0721528772988,

Description: GENUINE OEM (ORIGINAL EQUIPMENT MANUFACTURER) MEDIA AIR CLEANER REPLACEMENT FILTERS Nominal Size: 16" x 25" x 5" Actual Size: 15-3/8" x 25-1/2" x 5-1/4" Efficiency Rating: MERV 11 Please check and verify your filter actual size prior to ...


Smilie Cut-to-Fit Synthetic Air Filter, MERV 4, 20 x 30 x 1-Inch, 6-Pack
Smilie Cut-to-Fit Synthetic Air Filter, MERV 4, 20 x 30 x 1-Inch, 6-Pack
In Stock
$39.07
$31.59
You Save: 19%

mpn: SM1006, ean: 0031949154660,

The Flanders Smilie Cut-to-Fit Synthetic Air Filter is an ideal replacement for any hard to find specialty filters. Easily cut the 20-inch by 30-inch filter to size with shears or a razor knife. This air filter holds its shape and requires no frame s...


Filtrete Air Cleaning Filter, 11.75 in x 21.44 in x .75 in, 1/Pack
Filtrete Air Cleaning Filter, 11.75 in x 21.44 in x .75 in, 1/Pack
In Stock
$31.60
$15.53
You Save: 51%

mpn: FAPF03, ean: 0051111542941,

With Filtrete Ultra Air Purifiers and the FAPO3 (large) replacements filters, consumers can enjoy cleaner air anywhere. Filtrete air purifiers deliver powerful filtration in quiet, streamlined designs. The key to this delivery system is a combination...


16 x 25 x 2 Merv 8 Furnace Filter (12 Pack)
16 x 25 x 2 Merv 8 Furnace Filter (12 Pack)
In Stock
$59.05
$55.74
You Save: 6%

mpn: AZ2-V1-GF-M8-021625, ean: 0707470856693,

The Glasfloss Z-Line Series pleated filters offer improved performance for virtually every application. All Glasfloss Z-Line pleated filters feature fibers which do not absorb moisture and will not support microbial growth. The Glasfloss Z-Line Serie...


Aerostar 20x25x1 MERV 11  Pleated Air Filter, MERV 11, 20x25x1, Pack of 6, Made in the USA
Aerostar 20x25x1 MERV 11 Pleated Air Filter, MERV 11, 20x25x1, Pack of 6, Made in the USA
In Stock
$40.09

mpn: 20x25x1 MERV 11, ean: 0192212002146,

20x25x1 AC and Furnace Air Filter by Aerostar - MERV 11, Box of 6 Pleated MERV 11 Media Comparable to MPR 1000 to 1200 and FPR 7 Designed for Superior Filtration Efficiency Made with electrostatically charged synthetic material that draws and capture...


BestAir A201-SGM-11R Furnace Filter, Aprilaire 2200 & 2250 Replacement, MERV 11
BestAir A201-SGM-11R Furnace Filter, Aprilaire 2200 & 2250 Replacement, MERV 11
SKU: #PMAC-20F
In Stock
$27.26
$23.99
You Save: 12%

sku: PMAC-20F, mpn: A201/SGM, ean: 0078757012010,

BestAir Extreme Allergens, Pollen & Dander Air Cleaning Filter for Aprilaire/SpaceGard & Lennox - 24 1/4 x 6 MERV 11. Fits: Aprilaire SPACE GARD 2200, 2250 (201); Lennox PMAC-20C 24" -without cardboard frame. Our specialized filtration media has the ...


Aerostar Pleated Air Filter, MERV 11, 19 7/8 x 21 1/2 x 1, Pack of 6, Made in the USA
Aerostar Pleated Air Filter, MERV 11, 19 7/8 x 21 1/2 x 1, Pack of 6, Made in the USA
In Stock
$41.49

mpn: 19 7/8 x 21 1/2 x 1 MERV 11, ean: 0192212002306,

19 7/8 x 21 1/2 x 1 Carrier Replacement Filter by Aerostar - MERV 11, Box of 6 Replaces Bryant/Carrier part # KFAFK0312LRG Fits: FV4, FK4, FC4, FB4, FA4, FH4, FA48NF048, FA4ANF042, FA4BNC042, FA4BNC048, FA4BNF042, FA4CNC042, FB4ANF048, FC4BNB054, FC4...


3M 5P71-6 Particulate Replacement Filter (Pack of 6)
3M 5P71-6 Particulate Replacement Filter (Pack of 6)
In Stock
$11.44
$11.20
You Save: 2%

mpn: 051138662788, ean: 7241870805774,

5P71-6 Features: -Reliable protection against organic vapors and both oil and non-oil particles. -Help simplify prefilter selection, inventory and worker training. -Prefilters many chemicals and pesticides including oil aerosols and requires R, oil r...


Aprilaire 313 Replacement Filter
Aprilaire 313 Replacement Filter
In Stock
$52.15
$50.95
You Save: 2%

mpn: 313, ean: 0686720003134,

This is the MERV 13 replacement filter Aprilaire Air Cleaners.  The filter is the heart of the air cleaner and needs to be changed once a year. Use only genuine Aprilaire SelfSeal #313 to ensure the best performance of your air cleaner.For models 23...


True Blue Allergen 20x36x1 Air Filter , MERV 11, 4-Pack
True Blue Allergen 20x36x1 Air Filter , MERV 11, 4-Pack
In Stock
$58.01
$57.29
You Save: 1%

mpn: 320361.4,

The True Blue Allergen air filter is specifically designed for families with allergies and pets. It is 53 times more effective than fiberglass filters and will last up to 4 months. During the manufacturing process, we charge the filter media with an ...


Aerostar Pleated Air Filter, MERV 13, 20x25x1, Pack of 6, Made in the USA
Aerostar Pleated Air Filter, MERV 13, 20x25x1, Pack of 6, Made in the USA
In Stock
$48.42

mpn: 20x25x1 MERV 13, ean: 0192212002429,

20x25x1 AC and Furnace Air Filter by Aerostar - MERV 13, Box of 6 Pleated MERV 13 Media Comparable to MPR 1500 to 1900 and FPR 10 Designed for Superior Filtration Efficiency Made with electrostatically charged synthetic material that draws and captur...


Aerostar Pleated Air Filter, MERV 13, 16x25x1, Pack of 6, Made in the USA
Aerostar Pleated Air Filter, MERV 13, 16x25x1, Pack of 6, Made in the USA
In Stock
$37.99

mpn: 16x25x1 MERV 13, ean: 0192212002382,

16x25x1 AC and Furnace Air Filter by Aerostar - MERV 13, Box of 6 Pleated MERV 13 Media Comparable to MPR 1500 to 1900 and FPR 10 Alternate Part Numbers: 2001, 9801, 9831, 2001DC-6, 9801DC-6, 9831DC-6, EA01DC, EA01DC-6, UA01DC, UA01DC-6Designed for S...


BestAir AB2025-11R Furnace Filter, 20'' x 25'' x 5'', Air Bear Replacement, MERV 11
BestAir AB2025-11R Furnace Filter, 20" x 25" x 5", Air Bear Replacement, MERV 11
In Stock
$38.59

mpn: AB2025, ean: 0078757009362,

BestAir Extreme Allergens, Pollen & Dander Air Cleaning Filter For Air Bear - 20 x 25 x 5 MERV 11. Optimized For Air Bear 20 x 25 x 5 (actual 19 3/4 x 24 1/4 x 4 7/8”) Fits: Air Bear Models: Supreme 2000; 435790-027; 455602-019; 459200-005; Skuttle...


20x20x1, Percisionaire Ez Flow Ii Front Panel Merv 4, 10055.012020, Pack12
20x20x1, Percisionaire Ez Flow Ii Front Panel Merv 4, 10055.012020, Pack12
In Stock
$28.80

mpn: 10055.01202, ean: 0031949150273,

20x20x1, Percisionaire Ez Flow Ii Front Panel Merv 4, 10055.012020, Pack1220" x 20" x 1". EZ Flow II spun fiberglass disposable furnace filter. Flat panel. No metal media retainers. Up to MERV rating 4. ...


Accumulair Platinum 16x25x1 (15.75x24.75) MERV 11 Air Filter/Furnace Filters (4 pack)
Accumulair Platinum 16x25x1 (15.75x24.75) MERV 11 Air Filter/Furnace Filters (4 pack)
In Stock
$35.96
$21.10
You Save: 41%

mpn: 844359052378, ean: 0844359052378,

Up to 30-times more efficient at capturing allergens than ordinary fiberglass filters. Uniform pleat shape enhances dust holding capacity and maximizes air flow. Heavy duty construction frame prevents airflow bypass. This product is listed and rated ...


FilterBuy 16x25x1 MERV 13 Pleated AC Furnace Air Filter, (Pack of 6 Filters), 16x25x1 – Platinum
FilterBuy 16x25x1 MERV 13 Pleated AC Furnace Air Filter, (Pack of 6 Filters), 16x25x1 – Platinum
In Stock
$54.96

mpn: AFB16x25x1M13pk6,

The AFB Platinum MERV 13 furnace / air filter is a best in class, hospital grade filter. The Platinum filter by AirFilterBuy offers the best level of filtration possible while still allowing a traditional residential or business HVAC unit to function...



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