The Over Door PTC Heater/Fan from Prem-I-Air with Remote Control and 7.5 day Timer is ideal for installation in shop doorways and business reception areas. In fact install it anywhere you want to limit heat loss or temperature fluctuations where an exterior door is frequently in use. With 2 heat settings (1 or 2 kW) and a fan only setting, the Over Door Heater and Fan also features a wide oscillating angle for generous heat distribution and a timer for total control. The Over Door Heater and Cooler from Prem-I-Air features a ceramic PTC element, which is an extremely efficient heating method, ideal for areas where temperatures may fluctuate. The ceramic PTC element is self-regulating and varies its wattage to maintain a preset temperature. This means that it only draws the required current to maintain the temperature. This product also features an open door/window functions, this means that the unit will stop heating if it detects a sudden drop in temperature, it will resume when there has been no significant temperature drop in 5 minutes (making the unit compliant with current ERP regulations).