20 Best 21 5 X 23 5 Air Filter [2025]

Are you looking for the best 21 5 x 23 5 air filter? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling 21 5 x 23 5 air filter.

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# Preview Product
1 21 1/2 x 23 5/16 x 1 Carrier Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6 21 1/2 x 23 5/16 x 1 Carrier Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6
2 Aerostar 21 1/2x23 5/16x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21... Aerostar 21 1/2x23 5/16x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size:...
3 Filterbuy 21x23.5x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Trane Perfect... Filterbuy 21x23.5x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Trane...
4 Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane... Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane...
5 Filterbuy 20x23x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver) Filterbuy 20x23x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver)
6 Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21... Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size:...
7 Filterbuy 21x23.5x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Trane... Filterbuy 21x23.5x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Trane...
8 Filterbuy 20x21x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Lennox... Filterbuy 20x21x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Lennox...
9 Filterbuy 21x23x1 Air Filter MERV 11, Pleated HVAC AC Furnace Filters (6-Pack, Gold) Filterbuy 21x23x1 Air Filter MERV 11, Pleated HVAC AC Furnace Filters (6-Pack, Gold)
10 Filterbuy 20x23x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters... Filterbuy 20x23x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters...
11 21x23.5x5 MERV 8 Trane/American Standard BAYFTAH23M Aftermarket Filters (2 Pack) 21x23.5x5 MERV 8 Trane/American Standard BAYFTAH23M Aftermarket Filters (2 Pack)
12 FiltersFast Compatible Replacement for Trane 21' x 23' x 5' (Actual Size: 20.1' x 23.2' x 5')... FiltersFast Compatible Replacement for Trane 21" x 23" x 5" (Actual Size: 20.1" x 23.2" x 5")...
13 Filterbuy 20x21x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Lennox X8790 /... Filterbuy 20x21x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Lennox X8790...
14 Aerostar 21 1/2x23 5/16x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21... Aerostar 21 1/2x23 5/16x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size:...
15 Filterbuy 20x21x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Lennox... Filterbuy 20x21x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Lennox...
16 Bryant/Carrier/Payne Fan Coil Filter KFAFK0412XXL - 21 1/2 x 23 1/ 2 x 1 Bryant/Carrier/Payne Fan Coil Filter KFAFK0412XXL - 21 1/2 x 23 1/ 2 x 1
17 21 1/2 x 23 5/16 x 1 Payne Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6 21 1/2 x 23 5/16 x 1 Payne Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6
18 Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane... Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane...
19 Filterbuy 20x23x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Carrier,... Filterbuy 20x23x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Carrier,...
20 Aniywn Plus Size T-Shirt,Women Summer Casual O-Neck Short Sleeve Printing Patchwork Tunic Tops Basic... Aniywn Plus Size T-Shirt,Women Summer Casual O-Neck Short Sleeve Printing Patchwork Tunic Tops...
Bestseller No. 1
21 1/2 x 23 5/16 x 1 Carrier Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6
  • Actual Size: 21 1/2 x 23 5/16 x 7/8 (21.5 x 23.3125 x .875) | Nominal Size: 21 1/2 x 23 5/16 x 1
  • Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR rating 5 to 6.
  • Improved MERV 10 Filtration with similar air flow and resistance as a MERV 8 filter.
  • Durable & Long Lasting: Heavy duty frame won't buckle or support growth.
  • Affordable high quality replacements for Carrier 21 1/2 x 23 5/16 x 1 air filters.
Bestseller No. 2
Aerostar 21 1/2x23 5/16x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21...
  • Nominal Size: 21-1/2 x 23-5/16 x 1, Actual Size: 21-1/2"x23-5/16"x3/4"
  • Comparable to MPR 1500 to 1900 Ultimate Allergen Defense and Honeywell Allergen Elite FPR 10
  • Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, 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...
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance. Manufactured in the USA by Filtration Group, a world-leading...
Bestseller No. 3
Filterbuy 21x23.5x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Trane Perfect...
  • 21x23.5x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 20 x 23.09 x 4.97 inches)
  • Compatible Models: Trane Perfect Fit (BAYFTAH23M)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 4
Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane...
  • 21x23.5x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 20 x 23.09 x 4.97 inches)
  • Compatible Models: Trane Perfect Fit (BAYFTAH23M)
  • MERV 13 synthetic media (comparable with MPR 1500-1900 & FPR 10) protects homes from bacteria and more by trapping 98% of airborne particles without...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 5
Filterbuy 20x23x1 Air Filter MERV 8, Pleated HVAC AC Furnace Filters (2-Pack, Silver)
  • 20x23x1 replacement air filters for your furnace, air conditioner, or HVAC system (actual size: 19.50 x 22.50 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...
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products...
  • 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. 6
Aerostar 21 1/2x23 1/2x1 MERV 13 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21...
  • Nominal Size: 21 1/2 x 23 1/2 x 1, Actual Size: 21 1/2"x23 1/2"x3/4"
  • Comparable to MPR 1500 to 1900 Ultimate Allergen Defense and Honeywell Allergen Elite FPR 10
  • Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, fine dust, smoke, 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...
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance. Manufactured in the USA by Filtration Group, a world-leading...
Bestseller No. 7
Filterbuy 21x23.5x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Trane...
  • 21x23.5x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 20 x 23.09 x 4.97 inches)
  • Compatible Models: Trane Perfect Fit (BAYFTAH23M)
  • MERV 11 synthetic media (comparable with MPR 1000-1200 & FPR 7) protects homes from pets, allergies, and more by trapping 95% of airborne particles...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 8
Filterbuy 20x21x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Lennox...
  • 20x21x5 replacement whole house air filters for your furnace, air conditioner, or HVAC system (actual size: 19.88 x 20.5 x 4.38 inches)
  • Compatible Models: Lennox Filter Part Number (X8790), Housing Part Number (PCO14-23)
  • MERV 13 synthetic media (comparable with MPR 1500-1900 & FPR 10) protects homes optimally by trapping 98% of airborne particles without impacting air...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 9
Filterbuy 21x23x1 Air Filter MERV 11, Pleated HVAC AC Furnace Filters (6-Pack, Gold)
  • 21x23x1 replacement air filters for your furnace, air conditioner, or HVAC system (actual size: 21.00 x 23.00 x 1.00 inches)
  • MERV 11 synthetic media (comparable with MPR 1000-1200 & FPR 7) protects homes from pets or allergies by trapping 95% of airborne particles without...
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products...
  • 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. 10
Filterbuy 20x23x1 Air Filter MERV 8 Dust Defense (4-Pack), Pleated HVAC AC Furnace Air Filters...
  • 20x23x1 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.50" x 22.50" 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...
  • High-quality construction features an electrostatically charged, pleated design that captures more harmful particles and prolongs the products...
  • 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. 11
21x23.5x5 MERV 8 Trane/American Standard BAYFTAH23M Aftermarket Filters (2 Pack)
  • 21x23.5x5 ACTUAL: The actual size of this replacement filter is 21x23.5x5
  • MERV 8 RATING: With an efficiency of 70% to 85%, these filters are usually the best option for most residential homes & light commercial units,...
  • CAPTURES PARTICLES: Breathe easier in your home as our filter clears the air of lint, hair, debris, 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...
  • 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 and/or...
Bestseller No. 13
Filterbuy 20x21x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Lennox X8790 /...
  • 20x21x5 replacement whole house air filters for your furnace, air conditioner, heat pump, or HVAC system (actual size: 19.88 x 20.5 x 4.38 inches)
  • Compatible Models: Lennox Filter Part Number (X8790), Housing Part Number (PCO14-23)
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 14
Aerostar 21 1/2x23 5/16x1 MERV 11 Pleated Air Filter, AC Furnace Air Filter, 4 Pack (Actual Size: 21...
  • Nominal: 21-1/2 x 23-5/16 x 1, Size: 21-1/2"x23-5/16"x3/4" 21 1/2x23 5/16x1, AC Furnace Air Filter
  • Comparable to MPR 1000 to 1200 Micro Allergen Defense and Honeywell Allergen Plus FPR 7
  • Designed to filter microscopic particles such as lint, dust mites, spores, pollen, pet dander, 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...
  • 100% synthetic electrostatic media for high efficiency with low air flow resistance
Bestseller No. 15
Filterbuy 20x21x5 Air Filter MERV 11, Pleated Replacement HVAC AC Furnace Filters for Lennox...
  • 20x21x5 replacement whole house air filters for your furnace, air conditioner, or HVAC system (actual size: 19.88 x 20.5 x 4.38 inches)
  • Compatible Models: Lennox Filter Part Number (X8790), Housing Part Number (PCO14-23)
  • MERV 11 synthetic media (comparable with MPR 1000-1200 & FPR 7) protects homes from pets or allergies by trapping 95% of airborne particles without...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 16
Bryant/Carrier/Payne Fan Coil Filter KFAFK0412XXL - 21 1/2 x 23 1/ 2 x 1
  • Pack of 2
  • Actual Size: 21-1/2 x 23-1/2 x 7/8
  • Metal Frame
Bestseller No. 17
21 1/2 x 23 5/16 x 1 Payne Replacement MERV 10 Pleated Air Filters by Glasfloss. Box of 6
  • Actual Size: 21 1/2 x 23 5/16 x 7/8 (21.5 x 23.3125 x .875) | Nominal Size: 21 1/2 x 23 5/16 x 1
  • Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR rating 5 to 6.
  • For optimal performance, recommended to change at least every 3 months.
  • Improved MERV 10 Filtration with similar air flow and resistance as a MERV 8 filter. Durable & Long Lasting: Heavy duty frame won't buckle.
  • Affordable high quality replacements for Payne 21 1/2 x 23 5/16 x 1 air filters.
Bestseller No. 18
Filterbuy 21x23.5x5 Air Filter MERV 13, Pleated Replacement HVAC AC Furnace Filters for Trane...
  • 21x23.5x5 replacement whole house air filters for your furnace, air conditioner, or HVAC system (actual size: 20 x 23.09 x 4.97 inches)
  • Compatible Models: Trane Perfect Fit (BAYFTAH23M)
  • MERV 13 synthetic media (comparable with MPR 1500-1900 & FPR 10) protects homes optimally by trapping 98% of airborne particles without impacting air...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 19
Filterbuy 20x23x5 Air Filter MERV 8, Pleated Replacement HVAC AC Furnace Filters for Carrier,...
  • 20x23x5 replacement whole house air filters for your furnace, air conditioner, or HVAC system (actual size: 19.81 x 22.56 x 4.25 inches)
  • Compatible Models: Carrier / Bryant / BDP / Day & Night / Payne Filter Part Numbers (FILBBFNC0024, FILCCFNC0024, FILXXFNC0024, FILXXFNC0124), Housing...
  • MERV 8 synthetic media (comparable with MPR 600 & FPR 5) protects homes from dust, pollen, and more by trapping 90% of airborne particles without...
  • Electrostatically charged, pleated (100% US made) filters capture more harmful particles and last 3x longer than fiberglass models
  • Industrial-grade beverage board (recyclable) frames with dual wire backings outperform standard cardboard designs
Bestseller No. 20
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Having trouble finding a great 21 5 x 23 5 air filter?

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After hours of searching and using all the models on the market, we have found the best 21 5 x 23 5 air filter for 2023. See our ranking below!

How Do You Buy The Best 21 5 X 23 5 Air Filter?

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We understand, because we’ve already gone through the whole process of researching 21 5 x 23 5 air filter, which is why we have assembled a comprehensive list of the greatest 21 5 x 23 5 air filter available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for 21 5 x 23 5 air filter that you consider buying. Your questions might include the following:

  • Is it worth buying an 21 5 x 23 5 air filter?
  • What benefits are there with buying an 21 5 x 23 5 air filter?
  • What factors deserve consideration when shopping for an effective 21 5 x 23 5 air filter?
  • Why is it crucial to invest in any 21 5 x 23 5 air filter, much less the best one?
  • Which 21 5 x 23 5 air filter are good in the current market?
  • Where can you find information like this about 21 5 x 23 5 air filter?

We’re convinced that you likely have far more questions than just these regarding 21 5 x 23 5 air filter, and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for 21 5 x 23 5 air filter, rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible 21 5 x 23 5 air filter. Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an 21 5 x 23 5 air filter buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available 21 5 x 23 5 air filter currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of 21 5 x 23 5 air filter has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an 21 5 x 23 5 air filter?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your 21 5 x 23 5 air filter.
  5. Customer Ratings: Number ratings grade 21 5 x 23 5 air filter objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their 21 5 x 23 5 air filter.
  7. Product Quality: You don’t always get what you pay for with an 21 5 x 23 5 air filter, sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an 21 5 x 23 5 air filter is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining 21 5 x 23 5 air filter information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding 21 5 x 23 5 air filter is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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