If you have allergies, suffer from asthma or just want to enjoy clean air in your home, the Xiaomi Mi Air Purifier 3H can help. It utilizes HEPA filtration to remove 99.5% of fine particulates and gases in a room. The 3H is specifically designed for most living room sizes, with a cleaning area of 269 to 484 square feet. In addition to air purification, the 3H also features the ability to display the current indoor temperature and humidity level. All three values are shown on the built-in OLED display.