Review on 🔄 Enhance HVAC Filtration with FilterBuy 20X20X1 Pleated Furnace Filters by Adam Tidd

When I received these filters I had my suspicions because the material is very thin and the spacing between the fibers is large and noticeable compared to other Merv 13 filters I have is. There are no markings on the frame to indicate a Merv rating, just a QR code leading to a website with a default Merv 8 setting. I contacted the seller and they said if the tray says merv 13 then it is merv 13 and that the merv 8 setting on the website is just the default. They did not provide any further information. I have since tested these filters (I bought 2 sizes with the same result) with my air quality meter reading 1.0, 2.5 and 10pm and they are clearly not Merv 13 rated. They do NOT improve the air quality due to the recent forest fire AT ALL Pollution (outside air measurement and comparison with filtered air when the filter is permanently installed in the window and the air is sucked in by the whole house fan). As with NO gauge loss except a small amount at PM 10. Tried another brand and it works like a charm. reduces all values to 2-3 µg/m3. Outdoor air was about 28 µg/m3 for PM2 2.5. FRAUD PRODUCT