The combination of fan-forced efficiency, counterflow heat delivery and sealed combustion makes Cozy Top-Vent Counterflow Wall Furnaces the perfect heater for multi-story units, room additions, apartments, vacation homes, and more. Cozy Top-Vent Counterflow Wall Furnaces can be mounted on any inside or outside wall, allowing maximum installation flexibility. The powerful, thermostatically controlled blower draws cool air into the upper grill and delivers warm air at floor level, distributing heat uniformly throughout the room.