Tjernlund Products Inc.’s AirShare transfer fans quietly circulate heated or cooled air from fireplaces, stoves, electric baseboards, split system ductless air-conditioning and window air-conditioning units to adjacent rooms. Two installation types are available: horizontal airflow through stud walls and vertical airflow through floors and ceilings. All fans feature a low-profile, whisper-quiet intake blower and unobtrusive grilles. Transfer fans can be thermostatically controlled.