21" x 33" x 1" MERV 8 AC & Furnace Filters (6 Pack)

Made in USA
  • SP-21x33x1A-P8M6

  • 5 stars
  • (1)
List Price $317.77

Our Price: $158.89

Save: $158.88!
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Made to order (Ships in 3 business days)
Replace every 3 months
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  • Product Overview
  • Reviews
This item is made to order, non-returnable, and ships within 2-4 business days. Please check the actual dimensions listed below prior to ordering.
Notice: Air filters are often cut slightly smaller than the actual measurement during the manufacturing process. A margin of error of up to 1/8" is allowed without negatively affecting the overall fit and performance of the air filter.
MERV 8 21x33x1 Furnace Filter Overview
  • This is a non-standard size filter. The actual dimensions of the filter are 21" x 33" x 0.75". Please measure your existing filter before ordering to make sure it will be compatible.
  • This is a double panel filter. Due to the large face area (length x width), two filters will be taped together to make this size. This is an industry standard practice and does not affect the performance of the filter.
  • Long-lasting value package
The MERV 8 33 x 21 x 1 furnace & air conditioner filter will remove the following contaminants:
  • Lint & Dust
  • Dust Mite Debris
  • Pollen
  • Mold Spores
  • Pet Dander
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0 out of 0 people found this review helpful.
5.0 Stars

Great source for homeowners

By Woman on 10/17/2020 10:29:59AM

I have an oversize return air vent that stores don't carry. After a lot of searching online I found Allfilters so I called them. After I gave them the size they had my filters custom made and shipped. The employees are very friendly and easy to work. Just from speaking to them I was able to judge that they have great communication between them and so happy employees made me happy also. My filters are excellent and well made. I've had them since I bought this place in 2017.

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