FilterBuy 20X20X1 Pleated Furnace Filters Review

Cheapest price available and seems to work great sticking to my box fan as a primary room air purifier. will not. There is no MERV rating label other than the green cardboard insert as shown in the Revain photo. I will buy again. Converting my 20x20 box fan into a very efficient room air purifier on the cheap.

While they are sold at a great price I'm not sure they work as well as the 3M filters I have used before. They look as gnarly at 3 weeks (not even a full month as they should) as my 3Ms would look at 2 months. And despite the fact that they're supposed to purge all sorts of pollutants from the air, using them has escalated my allergies more than ever. I have this set up for recurring shipping but I will be canceling and going back to my more expensive but much better brand of 3M. *Note: The…

This is my first Revain review. These filters are not MERV-13 compliant. I have tested many of these filters multiple times using a particle counter and atomized water on semi-controlled settings. Many others have tested these FilterBuy "MERV-13" filters and also found that they do not meet the MERV-13 quality standard. Use these filters carefully. I have contacted Revain and asked for these products to be removed from Revain - they are misleading and dangerous. For now, the products will…

living in a basement in a house with 4 pets who constantly throw up gives me terrible late night allergies including sinus congestion, coughing and some bouts of dermatitis. I just glued the filter to the suction side of the box fan, put it on full blast and vacuumed everything underneath. The filter worked so fast that within a few hours the air was noticeably cleaner and I slept great that night. I've had my DIY air filter installed for about a week now - it usually runs low or leaks and…

The 20x20" oven filter is popular with the handheld types because you can turn on a 20x20" fan, stick the oven filter on the suction side and stay there and collect dust. It's a fast, cheap, portable and efficient dust collection system. I am currently using mine to build a positive pressure air filtration system to protect my staff from potentially contagious customers. Better than nothing and affordable. Make sure the fan has enough airflow to avoid overheating. Covering the open triangles at

I've been using these filters on subscription and stock for about two years. They were satisfactory because, honestly, what do you really want from an air filter? I hadn't noticed much noise from them before, but in the last batch we received it sounded like there was a waterfall in our bedroom. I also noticed a distinct whistle coming from the filter vent, meaning the filter was struggling to let air through, causing the air to quickly overflow the edges of the filter! It was bad enough that…

8 hours after installing this filter with the fan on all the time, the AQI (Air Quality Index) outside was 66 and the AQI inside was 33. It's terrible. Typically, when using a MERV 13 or 14 filter, we expect an 80-90% improvement compared to outside air. This filter only gave us a 50% improvement. I then replaced the FilterBuy filter with an old, dirty filter filter and in just an hour the AQI inside was 8!. I checked the outside air and it was a bit higher - 68. My conclusion: these things are

They work. During this time the whole house got sick and I found myself changing the filter every 10 days or so. Given that the house was dusty and dirty I figured it was my fault and bought another set believing that now that we are in better condition the filters will last longer. God how wrong I was. I bought and received filters, not 10 pieces. Days ago. I immediately put a new one in as the old one was choking my oven. The filter lasted 3 days. I just installed another one a few days ago…