21x21x4.5 MERV 11 Rheem / Ruud Compatible Filters (2 Pack)

Made in USA
  • SP-21x21x4.5W-P11M2

  • 5 stars
  • (8)
List Price $145.99

Our Price: $78.99

Save: $67.00!
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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 11 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

Don’t hesitate to order

By anonymous on 8/19/2022 10:20:42 AM

Fast delivery, quality furnace filter, great price. We’ll be ordering a pool filter next. Happy customers for three years!

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

Perfect fit!

By Anonymous on 12/24/2019 8:33:00 AM

Very pleased with the purchase of filters. Fast ship and very reasonable price.

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

Air Filters

By Female in 60s and over on 1/23/2022 7:34:37 AM

Outstanding service and price.

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

Easy to install, easy to use

By Woman in 60s and over from Port Charlotte, FL on 8/24/2021 3:36:31 PM

Fair price, delivered timely.

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

Easy to install, easy to use

By Woman in 60s and over from Port Charlotte, FL on 8/24/2021 3:36:51 PM

Fair price, delivered timely.

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

Great product!

By Woman in 60s and over from Saint Augustine, FL on 5/28/2020 7:56:36 AM

Would highly recommend this company. They are knowledgeable and very professional.

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

Merv 11 Filters

By Female in 60s and over from Saint Augustine, FL on 9/6/2022 7:44:37 AM

Outstanding service and price!

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

Good Filters

By Man in 60s and over from Springfield, MO on 9/24/2021 9:17:48 AM

I have been buying from All Filters for a while and continue to do so because the filters are made well and the orders are always sent on time. The packaging for shipment is always heavy duty so the contents arrive ready to use. I have been purchasing other filters as well because of the high quality.

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