Living Pure 8756 Living Pure 4-In-1 Heater and Air Purifier Acts as a heater- using a PTC heating element, it heats up to 1,000 square feet. It has an LCD control panel and a remote control Acts as a Air Purifier- it removes 99-Percent of particles as small as .3 microns and filter is washable Acts as a Air Sterilizer- using Photocatalytic Oxidation (PCO), using ultraviolet technology, the air is sterilized Acts as a Humidifier- with an onboard, re-fillable water tank, the unit passively adds humidity to help create a more comfortable environment Living Pure 4-IN-1 Heater and Purifier contains a tip over shut-off feature, a PCO UV light bulb and it is also coll to the touch on the outside during heating