21x21x4.5 MERV 8 Rheem / Ruud Compatible Filters (2 Pack)

Made in USA
  • SP-21x21x4.5W-P8M2

  • 5 stars
  • (2)
List Price $141.99

Our Price: $70.99

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Made to order (Ships in 2-6 weeks)
Replace every 6-12 months
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  • Product Overview
  • Reviews
This item is made to order, non-returnable, and ships within 2-6 weeks. 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.
21x21x4.5 Whole House Air Cleaner Filter Replacement
  • Offers an economical alternative to the name-brand filter without compromising air quality or efficiency.
  • Actual dimensions of the filters are 20-3/4" x 20-3/4" x 4-3/8".
  • MERV 8 rated per ASHRAE test standard 52.2.
Compatible OEM Filter Media Part Numbers
OEM Brand OEM Part Number OEM MERV Value
Rheem / Ruud PD540012 10
PD540018 13
Protech 540012 10
Protech 540018 13
Protech PD540042 8

0 out of 0 people found this review helpful.
5.0 Stars

A+

By Anonymous on 10/6/2021 8:35:28 AM

Great filters. I'm happy. Exactly as described and the best price out there pretty much.

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0 out of 0 people found this review helpful.
4.5 Stars

Quality Products are Important

By Man in 60s and over from Springfield, MO on 8/27/2020 7:55:59 AM

I had purchased these same filters from a competitor but the last order was very poor quality and when questioned there was no reply even after multiple tries. The filters from All Filters are very good quality as it is obvious their concern is excellent products. All filters will be ordered from them from now on

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