Williams' Forsaire counterflow furnace is equipped with a blower system that receives air at ceiling level, warms it and quietly delivers it at floor level to give an equalized floor-to-ceiling temperature! May be installed freestanding against a wall or recessed in a 16" stud wall space. Equipped with a four-foot service cord. Thermostat included. The heater is vented through the roof to the outside (venting material not included). Standing pilot.