Top 10 Koch Air Filter 20x25x4 – Furnace Filters

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1. Aerostar

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6 Pack Actual Size: 19 1/2"x24 1/2"x3 3/4", Aerostar 20x25x4 MERV 8 Pleated Air Filter, AC Furnace Air Filter

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Aerostar #ad - Nominal size: 20x25x4; actual size: 19 1/2"x24 1/2"x3 3/4"; this mERV 8 filter is comparable with MPR 600 & FPR 5. Manufactured in the usa by filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive. Simple to install and a cost-effective step towards a healthier home environment. 100% synthetic electrostatic media for high efficiency with low air flow resistance. Replace 3"-5" filters every 3-6 months. Designed to filter microscopic particles such as lint, spores, dust mites, and pollen.
BrandAerostar #ad
ManufacturerFiltration Group (Environmental Air) #ad
Height3.75 Inches
Length24.5 Inches
Weight2 Pounds
Width19.5 Inches
Part Number20x25x4 MERV 8
Model20x25x4 MERV 8

2. Nordic Pure

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Nordic Pure 20x25x4 MERV 12 Pleated AC Furnace Air Filters 2 Pack

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Nordic Pure #ad - Made in the USA. Nominal size: 20 x 25 x 4, actual size: 19 1/2 x 24 1/2 x 3 5/8 19. 5 x 24. 5 x 3. 63. If you are replacing a honeywell or lennox 20x25x4 or an air filter with an MPR rating with an actual depth of 4 3/8, please see our 20x25x5 4 3/8 actual depth. Nordic pure merv 12 is equivalent to MPR 1500-1900 Measure your air filter for the exact size and compare it to our actual size to ensure proper fit.
BrandNordic Pure #ad
ManufacturerNordic Pure #ad
Height3.63 Inches
Length24.5 Inches
Weight3.52 Pounds
Width19.5 Inches
Part Number20x25x4M12-2
Model20x25x4 (3 5/8)

3. Filterbuy

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Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense 2-Pack, Pleated HVAC AC Furnace Air Filters Replacement Actual Size: 19.38 x 24.38 x 3.63 Inches

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Filterbuy #ad - 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.

All components are manufactured within the United States and designed with recyclable materials. Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs. 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. 20x25x4 replacement air filters for your furnace, heat pump, air conditioner, or HVAC system actual size: 19.38" x 24. 38" x 3. 63".
BrandFilterbuy #ad
ManufacturerFilterbuy #ad
Height3.63 Inches
Length19.38 Inches
Weight6 Pounds
Width24.38 Inches
Part NumberAFB20x25x4M8pk2
ModelAFB20x25x4M8pk2
WarrantyDefective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

4. Aerostar

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AC Furnace Air Filter, 6-Pack Actual Size: 19 1/2"x24 1/2"x3 3/4", Aerostar 20x25x4 MERV 11 Pleated Air Filter

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Aerostar #ad - Nominal size: 20x25x4; actual size: 19 1/2"x24 1/2"x3 3/4"; this merv 11 filter is comparable with MPR 1000-1200 & FPR 7. Designed to filter microscopic particles such as lint, dust mites, pet dander, spores, pollen, fine dust, and smoke.

Replace 3"-5" filters every 3-6 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. Simple to install and a cost-effective step towards a healthier home environment.
BrandAerostar #ad
ManufacturerFiltration Group (Environmental Air) #ad
Height3.75 Inches
Length24.5 Inches
Width19.5 inches
Part Number20x25x4 MERV 11
Model20x25x4 MERV 11

5. Filtrete

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AC Furnace Air Filter, Filtrete 20x25x4SlimFit, Healthy Living Ultra Allergen Deep Pleat, 2-Pack actual dimensions 19.5 x 24.5 x 3.75, MPR 1550 DP

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Filtrete #ad - 54% small particle capture, like bacteria and particles that carry viruses % captured is based on ASHRAE 52. 2 testing for 03 to 1 micron particles from the air passing through the filter, which relates to HVAC industry standard efficiency testing.

1550 mpr has a rating of MERV 12. Sign-up for a filter change reminder program that works for you! A dirty filter will slow down air flow and make the system work harder to keep you warm or cool - wasting energy. And 5in. Designed with exclusive filtrete brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through. Thick air filters. Slim fit and 5 in. Filters. Outperforms fiberglass, washable and non-electrostatic 3-month pleated 1 in.

For optimal performance of your heating & cooling system or hvac system, change your home air filter at least every 90 days for 1in. Find your size: 1550 mpr available in 4 in. 4 in. Attracts and captures microscopic particles such as smoke, including lint, cough and sneeze debris, bacteria and viruses - and large particles, household dust and pollen. Filters, and at least every 12 months for 4in.
BrandFiltrete #ad
ManufacturerFiltrete #ad
Height3.75 Inches
Length24.5 Inches
Weight2.38 Pounds
Width19.5 Inches
Part NumberNDP03-4S-2P-2
ModelMPR 1550 DP
WarrantyLimited Warranty

6. Filterbuy

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Pleated HVAC AC Furnace Air Filters Replacement Actual Size: 19.38 x 24.38 x 3.63 Inches, Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense 4-Pack

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Filterbuy #ad - 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.

All components are manufactured within the United States and designed with recyclable materials. 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. 20x25x4 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size: 19.38" x 24. 38" x 3. 63". Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs.
BrandFilterbuy #ad
ManufacturerFilterbuy #ad
Height3.63 Inches
Length19.38 Inches
Weight12 Pounds
Width24.38 Inches
Part NumberAFB20x25x4M8pk4
ModelAFB20x25x4M8pk4
WarrantyDefective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

7. Filterbuy

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Pleated HVAC AC Furnace Air Filters Replacement Actual Size: 19.38 x 24.38 x 3.63 Inches, Filterbuy 20x25x4 Air Filter MERV 13 Optimal Defense 4-Pack

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Filterbuy #ad - All components are manufactured within the United States and designed with recyclable materials. 20x25x4 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size: 19.

38" x 24. 38" x 3. 63". Merv 13 synthetic media comparable with mpr 1500 - 1900 & FPR 10 protects homes from bacteria and more by trapping 98% of airborne particles without impacting air flow. Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs. 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.
BrandFilterbuy #ad
ManufacturerFilterbuy #ad
Height3.63 Inches
Length19.38 Inches
Weight12 Pounds
Width24.38 Inches
Part NumberAFB20x25x4M13pk4
ModelAFB20x25x4M13pk4
WarrantyDefective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

8. Filterbuy

#ad

Pleated HVAC AC Furnace Air Filters Replacement Actual Size: 19.38 x 24.38 x 3.63 Inches, Filterbuy 20x25x4 Air Filter MERV 8 Dust Defense 6-Pack

#ad
Filterbuy #ad - 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.

All components are manufactured within the United States and designed with recyclable materials. 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. Industrial-grade beverage board frames with dual wire backings outperform standard cardboard designs. 20x25x4 replacement air filters for your furnace, air conditioner, heat pump, or HVAC system actual size: 19.38" x 24. 38" x 3. 63".
BrandFilterbuy #ad
ManufacturerFilterbuy #ad
Height3.63 Inches
Length19.38 Inches
Weight18 Pounds
Width24.38 Inches
Part NumberAFB20x25x4M8pk6
ModelAFB20x25x4M8pk6
WarrantyDefective items and products that were shipped incorrectly are subject to a refund or replacement on a case by case basis. Please contact our customer support team for more information if you experience any issues.

9. Koch Filter

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20 x 25 x 4, Koch Filter 4inch Merv 11 Furnace Filter 6 Pack

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Koch Filter #ad - Merv 11. 100% performance Guarantee. Nominal size: 20 x 25 x 4. Made in the USA. Actual size: 19. 5"x 24. 5" x 3. 75".
BrandKoch Filter #ad
ManufacturerKoch Filter Corporation #ad
Part Number102-499-030

10. Aerostar

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AC Furnace Air Filter, Aerostar 20x25x1 MERV 13 Pleated Air Filter, 6 Pack Actual Size: 19 3/4"x 24 3/4" x 3/4"

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Aerostar #ad - Simple to install and a cost-effective step towards a healthier home environment. Nominal size: 20x25x1; actual size: 19 3/4" x 24 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, fine dust, dust mites, spores, pet dander, viruses, pollen, smoke, and bacteria.

100% synthetic electrostatic media for high efficiency with low air flow resistance. For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter months. Manufactured in the usa by filtration Group, a world-leading manufacturer and supplier of filtration solutions making the world safer, healthier & more productive.
BrandAerostar #ad
ManufacturerFiltration Group (Environmental Air) #ad
Height0.75 Inches
Length24.75 Inches
Width19.75 Inches
Part NumberP25S.012025-6
Model20x25x1 MERV 13