18x20x1-air-filter

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Aerostar 18x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 6 Pack

$33.86

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Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11)
Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 11)

$163.68

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Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)
Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 8)

$107.88

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18x20x1 AC and Furnace Air Filter by Aerostar - MERV 8, Box of 12
18x20x1 AC and Furnace Air Filter by Aerostar - MERV 8, Box of 12

$84.07

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$13.25

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18x20x1 Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack
18x20x1 Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack

$14.83

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18x20x1 (17_1/2x19_1/2) Pleated MERV 12 Air Filters 6 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 12 Air Filters 6 Pack

$57.99

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Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters
Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters

$39.90

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18x20x1 MERV 8 Pleated AC Furnace Air Filters. 6 Pack. Made in USA.
18x20x1 MERV 8 Pleated AC Furnace Air Filters. 6 Pack. Made in USA.

$39.97

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Filtrete 18x20x1 Air Filter MPR 800 MERV 10 Micro Particle Reduction 5 Filters!
Filtrete 18x20x1 Air Filter MPR 800 MERV 10 Micro Particle Reduction 5 Filters!

$59.85

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18X20X1 Air Filter Standard Pleated FPR 5 Dust & Pollen High Quality (3-Pack)
18X20X1 Air Filter Standard Pleated FPR 5 Dust & Pollen High Quality (3-Pack)

$17.94

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Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack New
Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack New

$13.96

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Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13)
Filterbuy 18x20x1 Pleated Air Filters, Replacement for HVAC AC Furnace (MERV 13)

$191.40

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Aerostar 18x20x1 MERV 11 Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 11 Furnace Air Filter, 6 Pack

$45.19

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Aerostar 18x20x1 MERV 13 Air Filter, 12 Pack (17 3/2" x 19 3/2" x 3/4")
Aerostar 18x20x1 MERV 13 Air Filter, 12 Pack (17 3/2" x 19 3/2" x 3/4")

$102.68

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Filterbuy Allergen Odor Eliminator 18x20x1 MERV 8 Pleated AC Furnace Air Filter
Filterbuy Allergen Odor Eliminator 18x20x1 MERV 8 Pleated AC Furnace Air Filter

$132.90

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18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 6 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 6 Pack

$55.49

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Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack

$39.95

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18x20x1 MERV 8 Pleated Air Filters by Mann+Hummel. 4 Pack.
18x20x1 MERV 8 Pleated Air Filters by Mann+Hummel. 4 Pack.

$32.97

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True Blue 118201 18x20 x 1 In. Fiberglass Air Filter, 30 Days - Quantity 12
True Blue 118201 18x20 x 1 In. Fiberglass Air Filter, 30 Days - Quantity 12

$50.99

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NEW 6 Pack, Aerostar 18x20x1, MERV 11 Pleated Air Filter
NEW 6 Pack, Aerostar 18x20x1, MERV 11 Pleated Air Filter

$14.99

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18x20x1 (17_1/2x19_1/2) Pleated MERV 13 Air Filters 6 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 13 Air Filters 6 Pack

$69.99

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18"x 20"x 1" 2-Pack AC Furnace Air Filter Rigid Washable Cut to Fit
18"x 20"x 1" 2-Pack AC Furnace Air Filter Rigid Washable Cut to Fit

$23.51

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18x20x1 Inch Standard Pleated Air Filter FPR 5, MERV 8 Moisture Resistant Frame
18x20x1 Inch Standard Pleated Air Filter FPR 5, MERV 8 Moisture Resistant Frame

$7.77

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BOX OF 6 AIRx HEALTH 18x20x1 MERV 13 Pleated Air Conditioner AC Filters!
BOX OF 6 AIRx HEALTH 18x20x1 MERV 13 Pleated Air Conditioner AC Filters!

$49.99

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18"x 20"x 1" 2-Pack AC ,Vent , Furnace Rigid Washable Air Filter
18"x 20"x 1" 2-Pack AC ,Vent , Furnace Rigid Washable Air Filter

$25.11

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Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack New
Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack New

$13.40

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Filtrete 18x20x1 Air Filter MPR 800 MERV 10 Micro Particle Reduction 4 Filters
Filtrete 18x20x1 Air Filter MPR 800 MERV 10 Micro Particle Reduction 4 Filters

$59.98

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Filtrete 18x20x1 Air Filter MPR 1000 MERV 11, Allergen 4-Pack
Filtrete 18x20x1 Air Filter MPR 1000 MERV 11, Allergen 4-Pack

$49.99

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18x20x1 AC and Furnace Air Filter by Aerostar - MERV 11, Box of 12
18x20x1 AC and Furnace Air Filter by Aerostar - MERV 11, Box of 12

$93.84

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Aerostar 18x20x1 MERV 8 Furnace Air Filter, 4 Pack
Aerostar 18x20x1 MERV 8 Furnace Air Filter, 4 Pack

$40.24

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Aerostar 18x20x1 MERV 13 Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 13 Furnace Air Filter, 6 Pack

$57.37

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18'' X 20'' X 1'' Standard Pleated Air Filter FPR 5, MERV 8 Captures&Traps Dust
18'' X 20'' X 1'' Standard Pleated Air Filter FPR 5, MERV 8 Captures&Traps Dust

$8.45

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18x20x1 Air Filter Glasfloss GDS Series Disposable - Box of 6
18x20x1 Air Filter Glasfloss GDS Series Disposable - Box of 6

$40.85

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Filtrete 18x20x1 Air Filter MPR 1500 MERV 12 Advanced Allergen Reduction 1Filter
Filtrete 18x20x1 Air Filter MPR 1500 MERV 12 Advanced Allergen Reduction 1Filter

$25.47

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18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 3 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 3 Pack

$39.49

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18x20x1 Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack
18x20x1 Pleated Air Filters Replacement For Furnace. AC HVAC MERV 8 FPR 5 3-Pack

$41.76

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18x20x1 Inch Standard Pleated Air Filter FPR 5, MERV 8 Moisture Resistant Frame
18x20x1 Inch Standard Pleated Air Filter FPR 5, MERV 8 Moisture Resistant Frame

$7.77

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Simply Filters 18x20x1 MERV 13, MPR 1500, AC Furnace HVAC Air Filter
Simply Filters 18x20x1 MERV 13, MPR 1500, AC Furnace HVAC Air Filter

$189.99

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Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction 4 Filters
Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction 4 Filters

$59.64

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$14.83

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18x20x1 AC and Furnace Air Filter by Aerostar - MERV 11, Box of 6
18x20x1 AC and Furnace Air Filter by Aerostar - MERV 11, Box of 6

$44.99

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18x20x1 (17_1/2x19_1/2) Pleated MERV 13 Air Filters 3 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 13 Air Filters 3 Pack

$43.99

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18x20x1 Standard Pleated Furnace Air Filter FPR 5 MERV 8 3-Pack
18x20x1 Standard Pleated Furnace Air Filter FPR 5 MERV 8 3-Pack

$18.00

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Filters Fast 18x20x1 MERV 8, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack
Filters Fast 18x20x1 MERV 8, 1 Inch Pleated HVAC AC Furnace Air Filters, 6 Pack

$62.99

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Magic Filter Home Air Filter 18 x 20 x 1 BT 108.01180200 MERV 8
Magic Filter Home Air Filter 18 x 20 x 1 BT 108.01180200 MERV 8

$14.71

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Pamlico 18x20x1 MERV 11 ( FPR 8-9 ) Pleated Air Filters. Case of 12
Pamlico 18x20x1 MERV 11 ( FPR 8-9 ) Pleated Air Filters. Case of 12

$75.97

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Honeywell 18x20x1 Superior Allergen Air Filter - Box of 12
Honeywell 18x20x1 Superior Allergen Air Filter - Box of 12

$50.00

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18 x 20 x 1 Standard Pleated Air Filter FPR 5, 3-Pack, Air Filters Replacement
18 x 20 x 1 Standard Pleated Air Filter FPR 5, 3-Pack, Air Filters Replacement

$14.83

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PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust Electronic
PERMANENT WASHABLE ELECTROSTATIC FURNACE AC AIR FILTER Dust Electronic

$49.95

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18X20X1 Air Filter Standard Pleated FPR 5 Dust & Pollen High Quality (3-Pack)
18X20X1 Air Filter Standard Pleated FPR 5 Dust & Pollen High Quality (3-Pack)

$14.83

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6 Pack - Nordic Pure 18x20x1 MERV 14 Pleated Plus Carbon AC Furnace Air Filters
6 Pack - Nordic Pure 18x20x1 MERV 14 Pleated Plus Carbon AC Furnace Air Filters

$44.95

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3-Pack Standard Pleated Air Filter 18x20x1, Air Filters Replacement FPR 5 MERV 8
3-Pack Standard Pleated Air Filter 18x20x1, Air Filters Replacement FPR 5 MERV 8

$14.38

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18x20x1 MERV 10 HVAC/Furnace pleated air filter (12)
18x20x1 MERV 10 HVAC/Furnace pleated air filter (12)

$88.99

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Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters Folding
Filtrete 18x20x1 Air Filter, MPR 300 MERV 5, Dust Reduction, 4 Filters Folding

$24.42

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1 PACK or 3 PACK - Air Filter Standard Pleated FPR 5 Dust Filters Furnace AC
1 PACK or 3 PACK - Air Filter Standard Pleated FPR 5 Dust Filters Furnace AC

$12.90

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$15.20

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$15.08

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18X20X1 (17.75 x 19.75) Enviroflow Air Filter (MERV 8) (4 Pack)
18X20X1 (17.75 x 19.75) Enviroflow Air Filter (MERV 8) (4 Pack)

$32.99

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$14.21

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Filtrete By 3M 18x20x1 MERV 10 Micro Particle Reduction HVAC Furnace Air Filter
Filtrete By 3M 18x20x1 MERV 10 Micro Particle Reduction HVAC Furnace Air Filter

$59.64

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Nordic Pure 18x20x1 MERV 14 Air Filter, AC Furnace Air Filter, 2 Pack
Nordic Pure 18x20x1 MERV 14 Air Filter, AC Furnace Air Filter, 2 Pack

$8.50

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(4 Pack) Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction
(4 Pack) Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction

$49.98

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18x20x1 (17_1/2x19_1/2) Pleated MERV 10 Air Filters 6 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 10 Air Filters 6 Pack

$55.99

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$29.34

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K&N 18X20X1 HVAC Furnace Air Filter, Lifetime, Washable, Merv 13, HVC-13-11820
K&N 18X20X1 HVAC Furnace Air Filter, Lifetime, Washable, Merv 13, HVC-13-11820

$89.99

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18x20x1 Air Filter Glasfloss GDS Series Disposable - Box of 12
18x20x1 Air Filter Glasfloss GDS Series Disposable - Box of 12

$64.91

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18x20x1 MERV 10 Pleated Air Filters. 12 PACK. Actual Size: 17-1/2 x 19-1/2 x 7/8
18x20x1 MERV 10 Pleated Air Filters. 12 PACK. Actual Size: 17-1/2 x 19-1/2 x 7/8

$71.97

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Filtrete 18x20x1Air Filter MPR 1200 MERV 11 Allergen Plus Odor Reduction 1Filter
Filtrete 18x20x1Air Filter MPR 1200 MERV 11 Allergen Plus Odor Reduction 1Filter

$25.13

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Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack

$37.00

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Aerostar 18x20x1 MERV 11 Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 11 Furnace Air Filter, 6 Pack

$41.95

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NEW CASE OF (12) USA MADE 18x20x1 AIR FURNACE FILTER HVAC FILTERS NEW 6953806
NEW CASE OF (12) USA MADE 18x20x1 AIR FURNACE FILTER HVAC FILTERS NEW 6953806

$28.99

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Filtrete 18x20x1 Air Filter MPR 1500 MERV 12 Advanced Allergen Reduction 1Filter
Filtrete 18x20x1 Air Filter MPR 1500 MERV 12 Advanced Allergen Reduction 1Filter

$25.47

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18x20x1 MERV 8 Air Filter/Furnace Filters (6 Pack)
18x20x1 MERV 8 Air Filter/Furnace Filters (6 Pack)

$40.80

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Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (Set Of 3)
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter (Set Of 3)

$5.00

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Permanent Washable Electrostatic Furnace Ac Air Filter Replacement Multi Sizes
Permanent Washable Electrostatic Furnace Ac Air Filter Replacement Multi Sizes

$39.99

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Lot of 12 Glasfloss Z-Line Series MERV 10 Air Filter Replacements 18" x 20" x 1"
Lot of 12 Glasfloss Z-Line Series MERV 10 Air Filter Replacements 18" x 20" x 1"

$69.99

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18x20x1 (17_1/2x19_1/2) Pleated MERV 10 Air Filters 2 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 10 Air Filters 2 Pack

$32.99

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UBeesize 18x20x1 Permanent Washable Electrostatic Air Filter Replacement
UBeesize 18x20x1 Permanent Washable Electrostatic Air Filter Replacement

$45.00

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Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter

$17.82

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Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC
Filterbuy 18x20x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC

$15.00

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(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados
(3-PACK) 18x20x1 Air Filter Standard Pleated Furnace AC Filtro de aire Plisados

$15.79

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1-Pack Standard Pleated Air Filter 18x20x1, Air Filters Replacement FPR 5 MERV 8
1-Pack Standard Pleated Air Filter 18x20x1, Air Filters Replacement FPR 5 MERV 8

$7.74

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18x20x1 Air Filter MERV 8 Odor Eliminator (1-Pack), Pleated HVAC AC Furnace Air
18x20x1 Air Filter MERV 8 Odor Eliminator (1-Pack), Pleated HVAC AC Furnace Air

$43.92

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18x20x1 in. Superior Standard Pleated Furnace Dust Air Filter FPR 9 Merv 12
18x20x1 in. Superior Standard Pleated Furnace Dust Air Filter FPR 9 Merv 12

$23.52

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Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack

$42.99

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18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 4 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 4 Pack

$41.99

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Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter
Simply Filters 18x20x1 MERV 8, MPR 600, AC Furnace HVAC Air Filter

$25.99

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​Air-Care ES18201 18" x 20" x 1" Permanent Electrostatic Air Filter Merv 8
​Air-Care ES18201 18" x 20" x 1" Permanent Electrostatic Air Filter Merv 8

$44.95

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18 x 20 x 1 Standard Pleated Air Filter FPR 5, 3-Pack, Air Filters Replacement
18 x 20 x 1 Standard Pleated Air Filter FPR 5, 3-Pack, Air Filters Replacement

$14.95

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18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 12 Pack
18x20x1 (17_1/2x19_1/2) Pleated MERV 8 Air Filters 12 Pack

$95.49

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12pack - 18x20x1, Percisionaire Ez Flow Ii Front Panel Merv 4, 10055.011820
12pack - 18x20x1, Percisionaire Ez Flow Ii Front Panel Merv 4, 10055.011820

$43.20

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Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction 4 Filters
Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction 4 Filters

$59.64

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Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter
Filtrete 18x20x1 Air Filter, MPR 800 MERV 10, Micro Particle Reduction, 1 Filter

$18.88

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Lot of 12 MERV 13 pleated Air Filters 18x20x1 (17 1/2" x 19 1/2" x 3/4") 12 pack
Lot of 12 MERV 13 pleated Air Filters 18x20x1 (17 1/2" x 19 1/2" x 3/4") 12 pack

$59.99

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18x20x1 (17_1/2x19_1/2) Pure Carbon Odor Reduction Furnace Air Filters 6 Pack
18x20x1 (17_1/2x19_1/2) Pure Carbon Odor Reduction Furnace Air Filters 6 Pack

$77.99

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Nordic pure 18x20x1 Merv12 Pleated Air Filters 4 Pack NEW opened box
Nordic pure 18x20x1 Merv12 Pleated Air Filters 4 Pack NEW opened box

$30.00

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Filtrete By 3M 18x20x1 MERV 10 Micro Particle Reduction HVAC Furnace Air Filter
Filtrete By 3M 18x20x1 MERV 10 Micro Particle Reduction HVAC Furnace Air Filter

$59.34

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Aerostar 18x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 12 Pack
Aerostar 18x20x1 MERV 6 Pleated Air Filter, AC Furnace Air Filter, 12 Pack

$67.69

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18x20x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Ai
18x20x1 Air Filter MERV 11 Allergen Defense (4-Pack), Pleated HVAC AC Furnace Ai

$67.76

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