Hero image 0 of Filter King 21x45x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 21 x 45 x .75", 0 of 5
Filter King 21x45x1 Air Filter | 4-PACK | MERV 8 HVAC Pleated A/C Furnace Filters | MADE IN USA | Actual Size: 21 x 45 x .75"
Key item features
- FILTER: This is a MERV 8 rated 4 pack Air Conditioner Filter | Size: 21" x 45" x 1" - Actual Size: 21" x 45" x .75"
- 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.
Specs
- Minimum efficiency reporting values (merv)8
- Contaminants removedDust
- BrandFilter King
- FeaturesPleated
- Thickness1"
- MaterialPleated
Current price is USD$105.72
Price when purchased online
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Arrives by Wed, May 27
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Sold and shipped by Filter King LLC
4.554878048780488 stars out of 5, based on 328 seller reviews(4.6)328 seller reviews
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About this item
Product details
Filter King Merv 8 21x45x1 4-Pack Air Filter actual size is 21x45x1.75. Our 21x45x1 Furnace Filters are designed to last up to 90 days. These pleated 1-inch air filters are ideal for maintaining the efficiency of your heating and cooling systems. Make sure you measure your filter. The actual size of this pleated Merv 8 filter is 21 x 45 x 1-3/4
- FILTER: This is a MERV 8 rated 4 pack Air Conditioner Filter | Size: 21" x 45" x 1" - Actual Size: 21" x 45" x .75"
- 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.
info:
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Specifications
Minimum efficiency reporting values (merv)
8
Contaminants removed
Dust
Brand
Filter King
Features
Pleated
Warranty
Warranty information
Please be aware that the warranty terms on items offered for sale by third party Marketplace sellers may differ from those displayed in this section (if any). To confirm warranty terms on an item offered for sale by a third party Marketplace seller, please use the 'Contact seller' feature on the third party Marketplace seller's information page and request the item's warranty terms prior to purchase.
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Showing 1-1 of 1 review
Feb 27, 2026
Steve Z.
5 out of 5 stars review
Seller Verified Purchase
Best Air Filters and Co.
I have a large odd size filter. This was the only company that offered the EXACT size. Other companies only offered i full inch size, where Filter King offered it in the fractional size for a perfect fit. Quality is excellent and price is very fair. Will always purchase from them as i have the last 3 times.
Review from filterking.com
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