Review on RENPHO Large Room Air Purifiers up to 1210 sq.ft, PM2.5 Air Quality Monitor, Auto Mode, Child Lock, H13 True HEPA Filter Cleaner for 99.97% Allergens, Smoke, Dust, Pollen, Pet Hair by Angela Flores

RENPHO Home Air Purifier Large Rooms up to 400m² PM2.5 Air Quality Sensor Auto Mode Lockout Kit H13 True HEPA Air Filter Purifier Allergy Smoke Pollen Pet Hair Cleaning This air The filter has a Digital display used to show air quality (ppm), fan speed control and other settings. When I plugged it in and started, my air quality was at level 3 (if 1 is desirable). Within a few hours on automatic, the filter was cleaning the air and my Dyson air filter agreed. Bi-weekly cleaning is recommended, but I don't know where I can get a replacement filter in due course.