This 1500W Classic infrared heater is an excellent heat source for up to 1000 square feet. It features an electronic thermostat that has a range from 16°C to 32°C, sleep mode, auto on after power outage, and room settings of small, medium, and large. A HEPA filter removes 99.5% particles small as 0.5 microns and PCO cell kills bacteria in the airflow. The purifier can be used without the heater function turned on. Safety features include a tilt over auto off safety switch, built in cut off thermostat and a 24 hour timer that can be preset to turn the unit on or off.