Top 10 Best 18x21x1 Air Filter
of November 2024
1
Best Choice
Filterbuy
Filterbuy
Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
10
Exceptional
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2
Best Value
Filterbuy
Filterbuy
Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
9.9
Exceptional
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3
Filterbuy
Filterbuy
Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
9.8
Exceptional
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4
Aerostar
Aerostar
Aerostar 18x22x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 1/2" x 21 1/2" x 3/4")
9.7
Exceptional
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5
SpiroPure
SpiroPure
SpiroPure 18X21X1 MERV 8 Pleated Air Filters - Made in USA (6 Pack)
9.6
Exceptional
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6
Aerostar
Aerostar
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")
9.5
Excellent
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7
Filtrete
Filtrete
Filtrete 18x24x1, AC Furnace Air Filter, MPR 300, Clean Living Basic Dust, 6-Pack (exact dimensions 17.81 x 23.81 x 0.81)
9.4
Excellent
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8
Filterbuy
Filterbuy
Filterbuy 18x22x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.75 x 21.75 x 0.75 Inches)
9.3
Excellent
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9
AIRX FILTERS WICKED CLEAN AIR.
AIRX FILTERS WICKED CLEAN AIR.
AIRx Filters Allergy 18x20x1 Air Filter MERV 11 AC Furnace Pleated Air Filter Replacement Box of 6, Made in the USA
9.2
Excellent
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10
Filterbuy
Filterbuy
Filterbuy 18x24x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.38 x 23.38 x 0.75 Inches)
9.1
Excellent
View on Amazon
About 18x21x1 Air Filter
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Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
18x21x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size 18.00 x 21.00 x 1.00. 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.
Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
18x21x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size 18.00 x 21.00 x 1.00. 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.
Filterbuy 18x21x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 18.00 x 21.00 x 1.00 Inches)
18x21x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size 18.00 x 21.00 x 1.00. 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.
Aerostar 18x22x1 MERV 8 Pleated Air Filter, AC Furnace Air Filter, 6 Pack (Actual Size: 17 1/2" x 21 1/2" x 3/4")
Nominal Size 18 x 22 x 1, Actual Size 17 12x21 12x34. Comparable to MPR 600 Clean Living and Honeywell Micro Defense Plus 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.
SpiroPure 18X21X1 MERV 8 Pleated Air Filters - Made in USA (6 Pack)
18x21x1 ACTUAL The actual size of this replacement filter is 18 x 21 x 0.75. MERV 8 RATING With an efficiency of 70 to 85, these filters are usually the best option for most residential homes light commercial units, ensuring airflow in your HVAC system is unrestricted.. CAPTURES PARTICLES Breathe easier in your home as our filter clears the air of dust, lint, and other indoor impurities.. AFFORDABLE QUALITY SpiroPure air filters are sold in packs to save you even more without cutting corners on material quality, efficiency, or filtration performance.. MADE IN USA Our pleated furnace filters are Made in the USA and offer a high quality replacement air filter option for your air conditioner andor furnace unit without the high cost..
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 34x 19 34 x 34 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 by Filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier more productive.
Filtrete 18x24x1, AC Furnace Air Filter, MPR 300, Clean Living Basic Dust, 6-Pack (exact dimensions 17.81 x 23.81 x 0.81)
OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. 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 large particles such as lint, household dust and dust mite debris. MPR 300 has a rating of MERV 5. The higher the MPR, the more microparticles - such as pollen, pet dander and smoke - your filter will capture from the air passing through it. CHANGE FILTER AT LEAST EVERY 90 DAYS for optimal performance of your heating cooling system or HVAC system. A dirty filter will slow down air flow and make the system work harder to keep you warm or cool -- wasting energy. Sign-up for a filter change reminder program that works for you. FOR RESIDENTIAL use only. CREATE A CHANGE COUNTDOWN in the Filtrete Smart app. Simply use the app to scan the barcode on your filters packaging, then choose 30, 60 or 90 days for your replacement countdown. When the lifespan is up, youll get a notification to change your filter.
Filterbuy 18x22x1 Air Filter MERV 8 Dust Defense (2-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.75 x 21.75 x 0.75 Inches)
18x22x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size 17.75 x 21.75 x 0.75. 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.
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 andor comparable with Allergen Defense MPR 1000 1085 1200, Odor Reduction MPR 1200 18x20x1 air filter.
Filterbuy 18x24x1 Air Filter MERV 8 Dust Defense (6-Pack), Pleated HVAC AC Furnace Air Filters Replacement (Actual Size: 17.38 x 23.38 x 0.75 Inches)
18x24x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size 17.38 x 23.38 x 0.75. 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.