Best 18X20X1 Air Filter

# Preview Product Price
1 Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4'x 19 3/4' x 3/4') Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19... $37.99
2 Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 4-Pack (exact dimensions 17.81 x 19.81 x 0.81) Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 4-Pack (exact dimensions... $64.39
3 Nordic Pure 18x20x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack Nordic Pure 18x20x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack $46.50
4 Precisionaire 18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted Precisionaire 18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted $45.95
5 Aerostar 18x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6-Pack (Actual Size: 17 3/4' x 19 3/4' x 3/4') Aerostar 18x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6-Pack (Actual Size: 17 3/4" x... $51.82
6 Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 6-Pack (exact dimensions 17.81 x 19.81 x 0.81) Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 6-Pack (exact dimensions... $89.70
7 Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver) Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver) $25.80
8 Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 6-Pack Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 6-Pack $33.31
9 Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 4-Pack Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 4-Pack $25.59
10 Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4'x 19 3/4' x 3/4') Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19... $42.46
11 AIRx Filters Allergy 18x20x1 Air Filter MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA AIRx Filters Allergy 18x20x1 Air Filter MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6,... $58.95
12 Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (12-Pack, Silver) Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (12-Pack, Silver) $102.48
13 Arm & Hammer Max Allergen & Odor Reduction 18x18x1 Air and Furnace Filter, MERV 11, 4-Pack Arm & Hammer Max Allergen & Odor Reduction 18x18x1 Air and Furnace Filter, MERV 11, 4-Pack $36.99
14 Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (4-Pack, Silver) Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (4-Pack, Silver) $39.88
15 Precisionaire Furnace Air Filter 18 ' X 20 ' X 1 ' Fiberglass Precisionaire Furnace Air Filter 18 " X 20 " X 1 " Fiberglass $44.02

Trusted products are abundant on the market. Customers often find it difficult to select the appropriate product. To help them with that process, we have listed the Top 20 Best 18X20X1 Air Filter , which will help them select the best item for their specific needs.

Bestseller No. 1
Aerostar 18x20x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4")
  • Nominal size: 18x20x1; Actual size 17 3/4"x 19 3/4" x 3/4"; This MERV 11 filter is comparable with MPR 1000-1200 & FPR 7.
  • Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, and smoke
  • Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance
  • Manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive
Bestseller No. 2
Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 4-Pack (exact dimensions 17.81 x 19.81 x 0.81)
  • OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system
  • DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through
  • ATTRACTS AND CAPTURES particles such as lint, pollen, dust, pet dander, smoke and smog
  • 1000 MPR has a rating of MERV 11
  • The higher the MPR, the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it
SaleBestseller No. 3
Nordic Pure 18x20x1 MERV 12 Pleated AC Furnace Air Filters 6 Pack
  • Nominal Size: 18 x 20 x 1, Actual Size: 17 1/2 x 19 1/2 x 3/4 (17.5 x 19.5 x 0.75)
  • Measure your air filter for the exact size and compare it to our actual size to ensure proper fit.
  • Ideal for high efficiency air filtration and will help those with moderate allergies and asthma.
  • Nordic Pure MERV 12 is equivalent to MPR 1500-1900
  • Made in the USA
Bestseller No. 4
Precisionaire 18X20x1 Fbg Furn Filter (Pack Of 12) 1005 Furnace Filters Mounted
  • "PRECISIONAIRE" FIBERGLASS FURNACE FILTER
  • Flat panel
  • Size : 18" X 20" X 1"
  • Disposable furnace filter
  • Merv rating1
Bestseller No. 5
Aerostar 18x20x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 6-Pack (Actual Size: 17 3/4" x 19 3/4" x 3/4")
  • Nominal size: 18x20x1; Actual size 17 3/4"x 19 3/4" x 3/4"; This MERV 13 filter is comparable with MPR 1500-1900 & FPR 10.
  • Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, viruses, and bacteria
  • Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance
  • Manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive
Bestseller No. 6
Filtrete 18x20x1, AC Furnace Air Filter, MPR 1000, Micro Allergen Defense, 6-Pack (exact dimensions 17.81 x 19.81 x 0.81)
  • OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. home air filters for your furnace, air conditioner or HVAC system
  • DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through
  • ATTRACTS AND CAPTURES particles such as lint, pollen, dust, pet dander, smoke and smog
  • 1000 MPR has a rating of MERV 11
  • The higher the MPR, the more microparticles--such as pollen, pet dander, smoke, bacteria and viruses--your filter will capture from the air passing through it
Bestseller No. 7
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver)
  • 18x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17.50 x 19.5 x 0.75 inches)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
Bestseller No. 8
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 6-Pack
  • UNIVERSALLY COMPATIBLE: This air conditioner, furnace and HVAC filter works with almost any brand. It is comparable to the 3M Filtrete MPR 600 Dust & Pollen, Filterbuy AFB Silver and the Honeywell FPR 5 models.
  • CREATE A CLEANER ENVIRONMENT: Entrap airborne particles that bring harm to you and your loved ones with our Merv 8 pleated air filters that capture dust, lint and pollen. Nominal Size: 18x20x1, Actual size is: 17 ¾” x 19 ¾” x ¾”
  • LONG-LASTING PERFORMANCE: Thanks to the thick build and pleated design, our air conditioner filter offers better capture coverage to trap more unwanted air particles and provides resilient filtration for up to 3 months to let only clean air pass through
  • EASY & SIMPLE TO USE: Installing or replacing our air filters for AC units or furnace is as simple as it gets. Simply slide the filter into the air filter return of your unit and you’re done! It’s recommended to change your filters every 90 days to maintain optimal filtration
  • QUALITY THAT COUNTS: We designed our pleated air filters with more pleats than most retail air filters to enhance airflow and efficiency. Each filter is made in the U.S.A with close attention to even the smallest details making it ideal for any residential home
Bestseller No. 9
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 4-Pack
  • UNIVERSALLY COMPATIBLE: This air conditioner, furnace and HVAC filter works with almost any brand. It is comparable to the 3M Filtrete MPR 600 Dust & Pollen, Filterbuy AFB Silver and the Honeywell FPR 5 models.
  • CREATE A CLEANER ENVIRONMENT: Entrap airborne particles that bring harm to you and your loved ones with our Merv 8 pleated air filters that capture dust, lint and pollen. Nominal Size: 18x20x1, Actual size is: 17 ¾” x 19 ¾” x ¾”
  • LONG-LASTING PERFORMANCE: Thanks to the thick build and pleated design, our air conditioner filter offers better capture coverage to trap more unwanted air particles and provides resilient filtration for up to 3 months to let only clean air pass through
  • EASY & SIMPLE TO USE: Installing or replacing our air filters for AC units or furnace is as simple as it gets. Simply slide the filter into the air filter return of your unit and you’re done! It’s recommended to change your filters every 90 days to maintain optimal filtration
  • QUALITY THAT COUNTS: We designed our pleated air filters with more pleats than most retail air filters to enhance airflow and efficiency. Each filter is made in the U.S.A with close attention to even the smallest details making it ideal for any residential home
Bestseller No. 10
Aerostar 18x20x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 3/4"x 19 3/4" x 3/4")
  • Nominal size: 18x20x1; Actual size 17 3/4"x 19 3/4" x 3/4"; This MERV 8 filter is comparable with MPR 600 & FPR 5.
  • Designed to filter microscopic particles such as lint, dust mites, spores, and pollen
  • Simple to install and a cost-effective step towards a healthier home environment. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance
  • Manufactured in the USA by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive
Bestseller No. 11
AIRx Filters Allergy 18x20x1 Air Filter MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA
  • MERV Rated Replacement Air Filter: AIRx Filters 18x20x1 (Actual: 17.50 x 19.50 x 0.75 in) MERV 11 air filter assures the effectiveness of your home HVAC system resulting to efficient heating, ventilation and air conditioning
  • Contaminant Reducing Replacement Air Filter: AIRx Filters 18x20x1 air filter replacement (Actual: 17.50 x 19.50 x 0.75 in) traps 1.0 - 10.0 micron of particles such as lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, and smog
  • High Quality Air Filter Replacement Material: AIRx Filters 18x20x1 (Actual: 17.50 x 19.50 x 0.75 in) air filters are 100% made in the USA using high quality air filter moisture resistant double-wall beverage board
  • Superior Air Filter Replacement Construction And Specs: AIRx Filters 18x20x1 air filter uses electrostatically charged 100% synthetic gradient media can perform at temperature ranging from 180F (82C) continuous service, peak 225F (107C)
  • Multi-Pack OEM Air Filter Replacement Compatible: AIRx Filters 18x20x1 MERV 11 air filter can replace and/or comparable with Allergen Defense MPR 1000 1085 1200, Odor Reduction MPR 1200 18x20x1 air filter
Bestseller No. 12
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (12-Pack, Silver)
  • 18x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17.50 x 19.5 x 0.75 inches)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
SaleBestseller No. 13
Arm & Hammer Max Allergen & Odor Reduction 18x18x1 Air and Furnace Filter, MERV 11, 4-Pack
  • Maximum odor reduction unscented pleated air filter
  • Allergen air filter plus enhanced odor reduction
  • Built in carbon granules have large capacity for absorbing odors
  • MERV 11 rating allergen reduction performance
  • Lasts up to 90 days
Bestseller No. 14
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (4-Pack, Silver)
  • 18x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17.50 x 19.5 x 0.75 inches)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
Bestseller No. 15
Precisionaire Furnace Air Filter 18 " X 20 " X 1 " Fiberglass
  • 18 x 20 x 1 in. EZ Flow II Spun Fiberglass Disposable Furnace Filter.
  • Flat Panel, No Metal Media Retainers.
  • Up To MERV Rating 4, 30 Day Filter.
  • Effective Against Dust/Lint.
  • Pack of 12.
Bestseller No. 16
Crisp Filters, 18x20x1 Air Filter, MERV 8, MPR 600, AC Furnace Air Filter, 2-Pack
  • UNIVERSALLY COMPATIBLE: This air conditioner, furnace and HVAC filter works with almost any brand. It is comparable to the 3M Filtrete MPR 600 Dust & Pollen, Filterbuy AFB Silver and the Honeywell FPR 5 models.
  • CREATE A CLEANER ENVIRONMENT: Entrap airborne particles that bring harm to you and your loved ones with our Merv 8 pleated air filters that capture dust, lint and pollen. Nominal Size: 18x20x1, Actual size is: 17 ¾” x 19 ¾” x ¾”
  • LONG-LASTING PERFORMANCE: Thanks to the thick build and pleated design, our air conditioner filter offers better capture coverage to trap more unwanted air particles and provides resilient filtration for up to 3 months to let only clean air pass through
  • EASY & SIMPLE TO USE: Installing or replacing our air filters for AC units or furnace is as simple as it gets. Simply slide the filter into the air filter return of your unit and you’re done! It’s recommended to change your filters every 90 days to maintain optimal filtration
  • QUALITY THAT COUNTS: We designed our pleated air filters with more pleats than most retail air filters to enhance airflow and efficiency. Each filter is made in the U.S.A with close attention to even the smallest details making it ideal for any residential home
SaleBestseller No. 17
Flanders PrecisionAire 84858.011820 18 by 20 by 1 NaturalAire Standard Pleat Air Filter, 12-Pack
  • Experience the clean air difference.
  • Pack of 12 quality filters designed for protection of furnace and central air units
  • MERV 8 rating: Removes household dust, pollen, dirt, mold spores and more
  • Pleated media provides large surface area for more effective filtration while keeping airflow resistance low
  • Each filter maintains efficiency for up to 90 days
Bestseller No. 18
Filterbuy 18x20x1 Air Filter MERV 8 (Allergen Odor Eliminator), Pleated HVAC AC Furnace Filters with Activated Carbon (2-Pack, Black)
  • 18x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17.50 x 19.5 x 0.75 inches)
  • MERV 8 (Odor Eliminator) synthetic media (comparable with MPR 600 & FPR 5) protects homes from adverse smells while trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
Bestseller No. 19
Filterbuy 18x20x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (6-Pack, Silver)
  • 18x20x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 17.50 x 19.5 x 0.75 inches)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without impacting air flow
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products lifespan by 3 times that of fiberglass models
  • Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs
  • All components are manufactured within the United States and designed with recyclable materials
Bestseller No. 20
AIRx Filters Odor 18x20x1 Air Filter MERV 8 AC Furnace Pleated Air Filter Replacement Box of 12, Made in the USA
  • Minimum Efficiency Reporting Value (MERV) Rated Air Filter: AIRx Filters 12x36x1 (Actual: 17.75 x 19.75 x 0.875 in) air filter are MERV rated to assure customers the effectiveness of our AC Furnace air filters. While the family enjoy a cleaner air, it also adds efficiency in the homes heating, ventilation and air conditioning (HVAC) System
  • MERV Rated Air Filter Help Shelter Your Family From Allergies: AIRx Filters 12x36x1 (Actual: 17.75 x 19.75 x 0.875 in) AC Furnace air filter attracts and/or removes lint, dust, pollen, dust mite debris, mold spores, pet dander, smoke, and smog
  • Quality Air Filter Materials And UVC Components: AIRx Filters 12x36x1 (Actual: 17.75 x 19.75 x 0.875 in) air filter are 100% made in the USA using quality air filter materials and components
  • Superior Air Filter Construction And Specification: AIRx Filters MERV 8 air filter uses carbon impregnated synthetic media. It can withstand 180F (82C) continuous service, peak 225F (107C) and resistant to 100% r.h.
  • Easy Air Filter Selection And Purchase: Purchasing an AIRx Filters is easy, AIRx Filters offers various sizes that would fit your AC and/or furnace air filter need. Also available in different multi-pack to fit every budget

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