Review on Proscenic Purifier A9 Connected Display by Julie Uhl

If you are looking for a HEPA filter that can clean almost 1000 m². Feet, this product is great for that. However, many of the "smart" features in it just don't work at all. The app is a hot mess. It's pretty obvious that this is a Chinese application translated into English. Not only will you see the status of your filter, but you'll quickly discover that advanced features only cause the app to keep crashing. I have an A9 model that is said to have an auto mode based on the PM2.5 level. the day after I got mine it just says "500" and nothing else. Don't go up, don't go down. I've tried moving it to other rooms in our house and nothing has changed. I know this is a problem with the unit because I have an air monitor that reads about 80 and turning on this filter helps it come down. So the filtering works, I will not buy again. It just promised a lot of smart features that don't work and that's why it's a big disappointment.