The Best 17.5 x 4 of 2025 – Reviewed and Top Rated
After hours researching and comparing all models on the market, we find out the Best 17.5 x 4 of 2025. Check our ranking below.
2,524 (random) Reviews Scanned
Rank No. #1
Filter King 17.5x17.5x4 Air Filter (MERV 8) (5-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 17.5 x 17.5 x 3.75)
- FILTER: This is a MERV 8 rated 5 pack Air Conditioner Filter | Size: 17.5" x 17.5" x 4" - Actual Size: 17.5" x 17.5" x 3.75"
- MADE IN USA: Fully manufactured in the United States. Made from the highest quality materials and construction. (EPA Establishment Number: 103501-FL-1)
- MAX PERFORMANCE: Our filters can last up to 90 DAYS before needing replacement. We do recommend to change your home air filter every 30 - 90 days for 1 inch filters. This will help maintain the longevity of the intended application like A/C and heaters
- CAPTURE MORE: Protect your home! The pleated design captures more particles and extends lifetime of the filter. Merv Filters trap airborne particles without impacting air flow. Feel the difference in 48 hours.
- FAST & EASY INSTALLATION: Open, Slide and Close! A simple yet effective replacement air filter for your home.
Rank No. #2
PARTNERS BRAND 17 x 17 x 4 Corrugated Cardboard Boxes, Flat 17"L x 17"W x 4"H, Pack of 25 | Shipping, Packaging, Moving, Storage Box for Home or Business, Strong Wholesale Bulk Boxes
- The smaller depths on these cartons provide an ideal fit for shallow products
- Perfect for shipping apparel, books, picture frames, artwork, mirrors and clothing
- Boxes are manufactured from 200#/ECT-32 kraft corrugated
- Corrugated boxes are reusable and recyclable
- Cartons are sold in bundle quantities and ship flat to save on storage space and shipping Proudly made in the USA
Rank No. #3
Filterbuy 17.5x27x4 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.50 x 27.00 x 3.63)
- UNIVERSAL COMPATIBILITY: 17.5x27x4 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.50" x 27.00" x 3.63")
- MERV 13 PERFORMANCE: Protect your home or business from germs, bacteria, and more with MERV 13 synthetic media (comparable with MPR 1900 & FPR 10) that captures 98% of dust without restricting air flow
- LONG-LASTING FILTRATION: Electrostatically charged media with 11 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
- SUPERIOR CONSTRUCTION: Easy installation beverage board frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
- MADE IN THE USA: Built with industrial-grade, recyclable materials and proudly manufactured 100% in the United States for dependable indoor air quality that is trusted by millions of homes
Rank No. #4
Filter King 17.5x17.5x1 Air Filter (MERV 13) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 17.5 x 17.5 x .75)
- FILTER: This is a MERV 13 rated 4 pack Air Conditioner Filter | Size: 17.5" x 17.5" x 1" - Actual Size: 17.5" x 17.5" x .75"
- MADE IN USA: Fully manufactured in the United States. Made from the highest quality materials and construction. (EPA Establishment Number: 103501-FL-1)
- MAX PERFORMANCE: Our filters can last up to 90 DAYS before needing replacement. We do recommend to change your home air filter every 30 - 90 days for 1 inch filters. This will help maintain the longevity of the intended application like A/C and heaters
- CAPTURE MORE: Protect your home! The pleated design captures more particles and extends lifetime of the filter. Merv Filters trap airborne particles without impacting air flow. Feel the difference in 48 hours.
- FAST & EASY INSTALLATION: Open, Slide and Close! A simple yet effective replacement air filter for your home.
Rank No. #5
Filterbuy 17.5x27x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.50 x 27.00 x 3.63)
- UNIVERSAL COMPATIBILITY: 17.5x27x4 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.50" x 27.00" x 3.63")
- MERV 8 PERFORMANCE: Protect your home or business from pollen, lint, mold, and more with MERV 8 synthetic media (comparable with MPR 700 & FPR 5) that captures 90% of dust without restricting air flow
- LONG-LASTING FILTRATION: Electrostatically charged media with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
- SUPERIOR CONSTRUCTION: Easy installation beverage board frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
- MADE IN THE USA: Built with industrial-grade, recyclable materials and proudly manufactured 100% in the United States for dependable indoor air quality that is trusted by millions of homes
Rank No. #6
Filtrete 17.5x23.5x1 Air Filter, MERV 11, MPR 1000, Allergens & Pet Dander, 3-Month AC and Furnace Filters, Cleaner Air, Reliable Airflow, 4 HVAC Filters (Actual Size 17.18 x 23.18 x 0.81 in)
- MAKE YOUR HOME YOUR SANCTUARY: 4-pack of 3-month pleated Filtrete 17.5x23.5x1 MERV 11 MPR 1000 AC Furnace Air Filter helps capture unwanted particles from your household air to contribute to a cleaner, fresher home environment
- ALLERGEN SEASON READY: Capture more allergens this spring with a Filtrete air filter (Compared to MERV 8 OR MPR 700 filters)
- EXCLUSIVE TECHNOLOGY: Designed with Filtrete 3-in-1 technology to pull in and trap unwanted particles, allowing cleaner air to flow through (Compared to MERV 11 minimum filter requirements; microparticles are 0.3 – 1.0 in size)
- COUNTLESS MICROPARTICLES: With a 1000 MPR and MERV 11 rating, your Filtrete Filter will help capture many microparticles from the air passing through it
- CERTIFIED: This furnace filter is CERTIFIED asthma and allergy-friendly (2) and helps capture dust, lint and other allergens in your household air
Rank No. #7
Filter King 17.5x21x1 Air Filter (MERV 8) (4-Pack) Dust & Allergy Control AC Furnace Filters, MADE IN USA, HVAC, Pleated, Electrostatic (Actual Size: 17.5 x 21 x .75)
- FILTER: This is a MERV 8 rated 4 pack Air Conditioner Filter | Size: 17.5" x 21" x 1" - Actual Size: 17.5" x 21" x .75"
- MADE IN USA: Fully manufactured in the United States. Made from the highest quality materials and construction. (EPA Establishment Number: 103501-FL-1)
- MAX PERFORMANCE: Our filters can last up to 90 DAYS before needing replacement. We do recommend to change your home air filter every 30 - 90 days for 1 inch filters. This will help maintain the longevity of the intended application like A/C and heaters
- CAPTURE MORE: Protect your home! The pleated design captures more particles and extends lifetime of the filter. Merv Filters trap airborne particles without impacting air flow. Feel the difference in 48 hours.
- FAST & EASY INSTALLATION: Open, Slide and Close! A simple yet effective replacement air filter for your home.
Rank No. #8
Filterbuy 18x18x4 Air Filter MERV 13 Optimal Smoke & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.50 x 17.50 x 3.63)
- UNIVERSAL COMPATIBILITY: 18x18x4 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.50" x 17.50" x 3.63")
- MERV 13 PERFORMANCE: Protect your home or business from germs, bacteria, and more with MERV 13 synthetic media (comparable with MPR 1900 & FPR 10) that captures 98% of dust without restricting air flow
- LONG-LASTING FILTRATION: Electrostatically charged media with 11 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
- SUPERIOR CONSTRUCTION: Easy installation beverage board frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
- MADE IN THE USA: Built with industrial-grade, recyclable materials and proudly manufactured 100% in the United States for dependable indoor air quality that is trusted by millions of homes
Rank No. #9
Filterbuy 18x18x4 Air Filter MERV 8 Essential Dust & Allergy Defense (2-Pack), Electrostatic Pleated HVAC AC Furnace Filters Replacement, Made in USA (Actual Size: 17.50 x 17.50 x 3.63)
- UNIVERSAL COMPATIBILITY: 18x18x4 replacement air filters for your furnace, air conditioner, or heat pump enhance HVAC system efficiency and support a healthy lifestyle (actual size: 17.50" x 17.50" x 3.63")
- MERV 8 PERFORMANCE: Protect your home or business from pollen, lint, mold, and more with MERV 8 synthetic media (comparable with MPR 700 & FPR 5) that captures 90% of dust without restricting air flow
- LONG-LASTING FILTRATION: Electrostatically charged media with 8 pleats per foot traps more microscopic particles and lasts 3x longer than fiberglass models (replace every 90 days for optimal performance)
- SUPERIOR CONSTRUCTION: Easy installation beverage board frames with dual wire backing outperform flimsy cardboard designs by improving durability, preventing warping, and resisting extreme temperatures
- MADE IN THE USA: Built with industrial-grade, recyclable materials and proudly manufactured 100% in the United States for dependable indoor air quality that is trusted by millions of homes
Rank No. #10
Glasfloss ZL 18x24x4 MERV 10 Pleated 4" Inch AC Furnace Air Filters. Box of 4. Actual Size: 17-1/2 x 23-1/2 x 3-3/4
- Actual Size: 17-1/2 x 23-1/2 x 3-3/4 | Nominal Size: 18x24x4
- Filtration Rating: MERV 10. Comparable to MPR rating 600 to 800, or FPR rating 5 to 6.
- Pressure drop is comparable to a MERV 8. Made in the USA. Ideal for residential and commercial use.
- For optimal performance, recommended to change at least every 3 months.
- Note: Does not replace 5" inch or 4-3/8" Depth filters. Please check actual filter size needed.
Last update on 2024-10-12 / Affiliate links / Images from Amazon Product Advertising API
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