pureComfort YEAR-ROUND combines into one what has traditionally required two separate appliances, a heater and a fan. As an all-in-one single appliance, for winter it is a 1500W PTC (positive thermal coefficient) heater with strong air flow. For summer, it is a powerful fan that thrusts directed air for circulation throughout the room. Each stands alone with its performance and functions. This unique and advanced space heating and cooling system is 100% heater when you want warmth and 100% fan when you want cool.