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Furnace Filters - 20 - Mega Sale! Save up to 23%


Mega Sale! Up to 23% off on Furnace Filters at Knights Of Labor. Top brands include MervFilters, AIRx Filters, Kilowatts Energy Center, AirCare, & FilterBuy. Hurry! Limited time offers. Offers valid only while supplies last.



16x25x1 MERV 8 Pleated Air Filters - 16 x 25 x 1 (4-Pack) - Premium Furnace, Air Conditioner and HVAC Filter - Blocks Dust, Mites, Pet Dander, Lint, Pollen - Universal Compatibility - MervFilters
16x25x1 MERV 8 Pleated Air Filters - 16 x 25 x 1 (4-Pack) - Premium Furnace, Air Conditioner and HVAC Filter - Blocks Dust, Mites, Pet Dander, Lint, Pollen - Universal Compatibility - MervFilters
By MervFilters
In Stock
$51.99
$39.99
You Save: 23%

ean: 0638126022004,

4.1 out of 5 stars with 36 reviews
Living in a cleaner environment starts with the air you breathe. No one does a better job of purifying the air in your home or office than MervFilters. These pleated furnace and HVAC air filters purify the air from particles such as dust, pollen and ...


16x20x1 MERV 8 Pleated Air Filters – 16 x 20 x 1 (4-Pack) - Premium Furnace, Air Conditioner and HVAC Filter - Blocks Dust, Mites, Pet Dander, Lint, Pollen – Universal Compatibility – MervFilters
16x20x1 MERV 8 Pleated Air Filters – 16 x 20 x 1 (4-Pack) - Premium Furnace, Air Conditioner and HVAC Filter - Blocks Dust, Mites, Pet Dander, Lint, Pollen – Universal Compatibility – MervFilters
By MervFilters
In Stock
$22.99

ean: 0638126021984,

Living in a cleaner environment starts with the air you breathe. No one does a better job of purifying the air in your home or office than MervFilters. These pleated furnace and HVAC air filters purify the air from particles such as dust, pollen and ...


AIRx Filters Dust 20x20x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
AIRx Filters Dust 20x20x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
By AIRx Filters
In Stock
$59.40

mpn: 20x20x1-DUST, ean: 0856781006041,

AIRx Filters MERV 8 20x20x1 air filter provides protection for your heating, ventilation and air conditioning (HVAC) system, keep your home a little cleaner by removing nuisance particles such as lint, dust, pollen, dust mite debris, and mold spores....


14x24x1 Activated Carbon Particles A/C Furnace Air Filters, Steel Frame
14x24x1 Activated Carbon Particles A/C Furnace Air Filters, Steel Frame
By Kilowatts Energy Center
In Stock
$24.99

mpn: 14241KeCFPC1,

Replaces 14x24x1 sized disposable filters. The actual size of this filter is 13-3/4 x 23-3/4 x 7/8. Polycarbon filter, made of polyester fiber impregnated with activated carbon particles, basically to eliminate odors of the environment in a retrieval...


14x24x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 94% Arrestance.. Never Buy a New Filter
14x24x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 94% Arrestance.. Never Buy a New Filter
By AirCare
In Stock
$29.99

mpn: 14241ES94A,

Replaces 14x24x7/8 sized disposable filters. The actual size of this filter is 13-5/8 x 23-5/8 x 7/8. Replace your disposable air filter with an Electrostatic Furnace Filter. Our products manufacturing Electrostatic Filters has a rating of Merv 11. T...


17-1/2x21x1 Lifetime Air Filter - Electrostatic, Permanent, Washable - For Furnace or A/C - Never Buy Another Filter
17-1/2x21x1 Lifetime Air Filter - Electrostatic, Permanent, Washable - For Furnace or A/C - Never Buy Another Filter
By Kilowatts Energy Center
In Stock
$29.99

mpn: 1712211m11VAFS,

Replaces 17-1/2x21x1 sized disposable filters. The actual size of this filter is 17-1/2x21x7/8. Replace your disposable air filter with an Electrostatic Furnace Filter. Our products manufacturing Electrostatic Filters has a rating of Merv 11. They're...


18x36x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter.. Never Buy a New Filter
18x36x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter.. Never Buy a New Filter
By Kilowatts Energy Center
In Stock
$38.96

mpn: 83-D1DF-56G5,

Replaces standard 18x36x1 sized disposable filters. The actual size of this filter is 17-5/8 x 35-5/8 x 7/8 these filters retail elsewhere for $79.99-$99.99. Your satisfaction is 100% guaranteed! These permanent, washable air filters remove up to 95%...


16x22x1 Lifetime Air Filter - Electrostatic, Permanent, Washable - For Furnace or AC - Never Buy Another Filter
16x22x1 Lifetime Air Filter - Electrostatic, Permanent, Washable - For Furnace or AC - Never Buy Another Filter
By Kilowatts Energy Center
In Stock
$29.99

mpn: 16221m1120170828,

Replaces 16x22x1 sized disposable filters. The actual size of this filter is 16x22x7/8. Replace your disposable air filter with an Electrostatic Furnace Filter. Our products manufacturing Electrostatic Filters has a rating of Merv 11. They're washabl...


18x30x1 Washable Permanent A/C Furnace Air Filter
18x30x1 Washable Permanent A/C Furnace Air Filter
By Kilowatts Energy Center
In Stock
$36.99

mpn: 18301FC1-85%,

Replaces 18x30x1 sized disposable filters. The actual size of this filter is 17-3/4 x 29-3/4 x 7/8. In the center, non-woven layer retains debris in a maze of fibers designed to maximize air flow even when soiled. Rated by independent testing laborat...


16x25x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter
16x25x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter
By Kilowatts Energy Center
In Stock
$25.99

mpn: G9-FFLY-DOJJ,

Replaces standard 16x25x7/8 sized disposable filters. Standard filters are generally undercut 3/8 inch. The actual size of this filter is 15-5/8 x 24-5/8 x 7/8. In the center, non-woven layer retains debris in a maze of fibers designed to maximize ai...


20x25x1 MERV 8 Pleated AC Air Filters - 4-Pack - Replacement Furnace Filter - Protect Against Dust, Mites, Pet Dander, Lint, Pollen
20x25x1 MERV 8 Pleated AC Air Filters - 4-Pack - Replacement Furnace Filter - Protect Against Dust, Mites, Pet Dander, Lint, Pollen
By MervFilters
In Stock
$37.99
$30.99
You Save: 18%

ean: 0638126022028,

4.0 out of 5 stars with 35 reviews
Living in a cleaner environment starts with the air you breathe. No one does a better job of purifying the air in your home or office than MervFilters. These pleated furnace and HVAC air filters purify the air from particles such as dust, pollen and ...


FilterBuy 24x24x1 MERV 8 Pleated AC Furnace Air Filter, (Pack of 2 Filters), 24x24x1 – Silver
FilterBuy 24x24x1 MERV 8 Pleated AC Furnace Air Filter, (Pack of 2 Filters), 24x24x1 – Silver
By FilterBuy
In Stock
$22.98

mpn: AFB24x24x1M8pk2,

The AFB Silver MERV 8 furnace / air filter is the most commonly purchased replacement filter by AirFilterBuy. The AFB Silver filters pollen, mold, dust mites, and other particles that are up to the size of 'pudding mix' that you might buy at the groc...


AIRx Filters Dust 10x10x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
AIRx Filters Dust 10x10x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
By AIRx Filters
In Stock
$65.40

mpn: 10x10x1-DUST, ean: 0817768020894,

AIRx Filters MERV 8 10x10x1 air filter provides protection for your heating, ventilation and air conditioning (HVAC) system, keep your home a little cleaner by removing nuisance particles such as lint, dust, pollen, dust mite debris, and mold spores....


16x16x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter
16x16x1 Lifetime Air Filter - Electrostatic Washable Permanent A/C Furnace Air Filter
By Kilowatts Energy Center
In Stock
$29.99

mpn: 4J-ZG1T-J8QI,

Replaces standard 16x16x1 sized disposable filters. The actual size of this filter is 15-5/8 x 15-5/8 x 7/8 these filters retail elsewhere for $79.99-$99.99. Your satisfaction is 100% guaranteed! These permanent, washable air filters remove up to 95%...


AIRx Filters Dust 20x30x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA
AIRx Filters Dust 20x30x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA
By AIRx Filters
In Stock
$53.70

mpn: 20x30x1-DUST, ean: 0817768020320,

AIRx Filters MERV 8 20x30x1 air filter provides protection for your heating, ventilation and air conditioning (HVAC) system, keep your home a little cleaner by removing nuisance particles such as lint, dust, pollen, dust mite debris, and mold spores....


14x24x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 82% Arrestance.. Never Buy a New Filter
14x24x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 82% Arrestance.. Never Buy a New Filter
By Kilowatts Energy Center
In Stock
$29.99

mpn: 14241ES82A,

Replaces standard 14x24x7/8 sized disposable filters. Standard filters are generally undercut 3/8 inch. The actual size of this filter is 13-5/8 x 23-5/8 x 7/8. Replace your disposable air filter with an Electrostatic Furnace Filter. Our products man...


25x25x1 Lifetime Air Filter Electrostatic A/C Furnace Air Filter Silver 94% Arrestance.. Never Buy a New Filter
25x25x1 Lifetime Air Filter Electrostatic A/C Furnace Air Filter Silver 94% Arrestance.. Never Buy a New Filter
By Kilowatts Energy Center
In Stock
$29.73

mpn: 25251ES94A,

Replaces standard 25x25x1 sized disposable filters. Standard filters are generally undercut 3/8 inch. The actual size of this filter is 24-5/8 x 24-5/8 x 7/8 These filters retail elsewhere for $69.99-$99.99. Your satisfaction is 100% guaranteed! Thes...


20x30x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 82% Arrestance.
20x30x1 Lifetime Air Filter - Electrostatic A/C Furnace Air Filter Silver 82% Arrestance.
By Kilowatts Energy Center
In Stock
$45.99

mpn: 20301ES82A,

Replaces standard 20x30x1 sized disposable filters. Standard filters are generally undercut 3/8 inch. The actual size of this filter is 19-5/8 x 29-5/8 x 7/8 These filters retail elsewhere for $69.99-$99.99. Your satisfaction is 100% guaranteed! Thes...


23-1/2 x 23-1/2 x 1 Lifetime Air Filter - Electrostatic Washable Furnace A/C Silver 94% Arrestance
23-1/2 x 23-1/2 x 1 Lifetime Air Filter - Electrostatic Washable Furnace A/C Silver 94% Arrestance
By Kilowatts Energy Center
In Stock
$29.99

mpn: 2352351AFS-94%,

A special impregnated black polypropylene has an EPA registered anti-microbial material to inhibit mold and bacteria growth while the center, non-woven layer retains debris in a maze of fibers designed to maximize air flow even when soiled. Rated by ...


AIRx Filters Dust 19x21x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
AIRx Filters Dust 19x21x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
By AIRx Filters
In Stock
$93.90

mpn: AIRx_DU_19x21x1-AM_12PK, ean: 0817768026629,

AIRx Filters MERV 8 19x21x1 air filter provides protection for your heating, ventilation and air conditioning (HVAC) system, keep your home a little cleaner by removing nuisance particles such as lint, dust, pollen, dust mite debris, and mold spores....



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