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20 x 25 x 1 Eco Plus Adjustable FPR 4 Air Filter

  • Fibers are charged to attract a variety of airborne particles
  • 3-step filtration ensures thorough purge of air impurities
  • MERV 8 filter with 19.63 x 24.63 x 0.75 (in.) actual dimensions
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Product Overview

The Web ECO Filter Plus has electrostatically charged fibers that attract and capture dust, mold, pollen and dander. The Web ECO Filter Plus frame can be reused for up to 10 years with proper care. Simply rinse with water, let dry and reinstall in your HVAC system. The Web ECO Filter Plus reduces landfill waste and is made from recycled plastics.
  • Traps up to 91% of pollen, dust, and dander-sized particles from 0.3 to 10 microns
  • Simply rinse and reuse
  • Electrostatically-charged fibers attract airborne allergens
  • Filter performance rating (FPR) of 4
  • 3 stage filtration - stage 1 captures larger particles
  • Stage 2 captures smaller particles
  • Stage 3 traps remaining particles

Additional Resources

From the Manufacturer

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Actual Product Depth (in.).75Actual Product Height (in.)24.63
Actual Product Width (in.)19.63Air Filter Depth (in.)1
Air Filter Height (in.)25Air Filter Size20x25
Air Filter Width (in.)20


Air Filter FeaturesWashableAir Filter TypeElectrostatic
Contaminants CapturedBacteria,Dust/Lint,Mold Spores,Most Smoke,PollenFilter Frame MaterialPlastic
Filter MaterialPolypropyleneFilter Performance Rating (FPR)4-5 - Good
Longevity (months)120MERV Rating (Minimum Efficiency Reporting Value)MERV 8
Pack Size1Returnable90-Day

Warranty / Certifications

Manufacturer WarrantyWarranty by manufacturer against materials and workmanship.

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4
    out of 485 reviews
  • 75%recommend this product
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Showing 1-10 of 485 reviews
Poor design but good for fostering frustration
My house requires 2 filters.i bought 1 of these to try. I convinced whoever designed this very likely doesn't use it. I'm fairly mechanical. I designed and built most of the furniture in my house. I've restored classic cars. I designed and built the shed in my back yard. I enjoy wooden Chinese puzzles. 6 months ago I bought this and ended up putting it away until my assembly frustration cooled. Today was my second and last attempt at putting this together. It can be done but I'd recommend using duck tape along the edges to keep it together while you fight the frame. This also could be improved by redesigning the grid to match standard sizes of hvac filters so that the black grid had even smooth edges after being cut. In addition there should be a way to hold the mesh screens and the form filter together without the frame. I used duct tape. The tape also helped smooth the grid edge so it would be easier to tuck into the frame. I've spend about 2 hours trying to get it to work correctly. I ended up throwing this in the trash and would not recommend it to anyone.
Response from Product ExpertJan 18, 2022
Did the adjustable Web Eco Plus have the 4 locking tabs? The instruction are in the inside of the marketing cover paper. You can call our Customer Service Dept. and we could have walked you though how to adjust your filter. 888-808-9100 ProtectPlus
    4 found this review helpful
    I opted to purchase this filter instead of going with our normal disposable filters last month (M...
    I opted to purchase this filter instead of going with our normal disposable filters last month (May 2020). We did no need to cut the filter as it already fit, but I did observe how one would cut it and put it back together and it seems straightforward. The only thing I don't love is that when the air kicks on, this filter seems to have a small gap where it gets sucked up and clicks against the metal in the intake, but this could be solved with a paper shim. This seems to work at least as well as our standard-grade disposable filters that we used to buy, and is holding up well against pet hair and dust. You will need 2 - one to be in the filter, one to be washed and dried. We rinse ours outside with a hose and then blow it out with an air compressor, and store it wrapped in a towel in a loosely cinched garbage bag in the garage so that it doesn't stay damp and is somewhat protected from debris and bugs.
      • Recommended
      2 found this review helpful
      I dont ever write reviews but this one deserved it
      This filter is junk ive had it in my furnace about a month and i went to pull out and clean it.well lets just say that wasnt a 2 min thing bc the filter opened inside and would not fit through the opening and i had to take the return apart to get it out.and to top all that off it looks brand new like the day i put it in which tells me it failed as a filter as well! Absolute garbage!
        • Recommended
        2 found this review helpful
        a much better alternative to throwaway filters.
        a much better alternative to throwaway filters.
        • Verified Purchase
        • Recommended
        1 found this review helpful
        Works awesome as reusable aquarium filter material!
        It may seem odd but this material works a million times better that the cheap filter material that breaks down. My 125 gallon tank looks great because of this material. I simply remove the grid (wife is a teacher and uses them at her school).
        • DIY
        • Verified Purchase
        • Recommended
        2 found this review helpful
        1/2 inch too small
        I bought this filter from the store while shopping for a replacement filter. The store recommended it, but when I got home I looked up reviews and read them. I then took my unopened, unadjusted filter and tried to inset it and saw that the 20" inches (my width) is 1/2 inch too narrow and would miss covering the vent opening by about 1/8 inch. When holding it next to my 20 x 20 filter I had in there it was 1/2 inch shorter! WOW, what a pain and why must it be? Can they not measure 20" inches? I will have to drive back to the store and buy something else. I would guess then every measurement when cut/adjusted to size would be off 1/2 inch! What...The........??!!
          8 found this review helpful
          Great Reusable Eco Filter
          I have used the Adjustable FPR 4 Air Filters for years. The particular replacement set was the easiest to setup out of the box in the past 12 years. I did not have to cut this one down, it was the size of filter my unit uses. They are easily washable, I usually am using one and have a spare set in reserve to allow time to clean them.
          • Verified Purchase
          • Verified Purchase
          Perfect fit and washable...
          Perfect fit and washable
          • Verified Purchase
          I agree
          I agree with the others, I purchased this filter. As soon as I took the wrapping off the filter fell apart! It was so flimsy and I could not get to back together. Finally gave up and stuck in a trash bag and will be returning tomorrow! I do not recommend this filter.
          Response from Product ExpertAug 5, 2022
          Yes, our filters is adjustable. The frame isn't fixed until you push the tabs into it. Please call our customer service and we can walk you
          through how to assemble your filter. 888-808-9100 Thanks ProtectPlus
            Showing 1-10 of 485 reviews