Review on Cozmor Air Purifier: Large Room H13 True HEPA Filter with Smart Auto Sensor - Eliminate 99.98% Odors, Mold, Pollen and Smoke, Perfect for Bedroom and Office. Includes Sleep Mode, Timer, and Child-Lock by India Stack

This is exactly what I needed. It's light, so I moved it to another room when needed. However, I bought it for my bedroom. When my Cozmor arrived I immediately read the manual and followed the simple instructions. When I turned it on at high speed because the air quality was poor. After the air quality indicator became good, the fan speed moved to the first speed. I was surprised by the short time it takes for air quality to go from bad to average to good. The sleep mode option is also handy when the fan speed is too high for light sleepers. Cosmor met all my expectations and I will order again. Actually I'm thinking about ordering a virtual second that would be moved from room to room.