I needed a large air filter and figured it should work alongside a check valve. I wanted the smartest and biggest I could find without breaking my wallet where I found this one, really good specs and decided to give it a try. I wasn't disappointed, it worked great. Firstly, really good quality, top filter and large air intake on both sides of the air purifier. Secondly, setup was so easy, including the Android app which took me no more than two minutes to set up. Finally the air quality sensor is right where I have the manual version and after checking the rooms everything was at that level 9 to match the air purifier which made me happier than ever. So if you use one big one, with proper placement, it can do the work of many small ones. Where I strongly recommend near the return line. It's hard to show how beautiful it is using just photos, so I made a video to show it off. No cons, worked really great for me where I'm very happy with the purchase.
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