AireShare is the latest transfer fan from Tjernlund Products. The company says the fan is designed to distribute heated or cooled air for better comfort, energy savings and ventilation rates from room-to-room through interior walls or level-to-level through floors and ceilings. AireShare transfer fans are available for two types of installations: horizontal airflow through stud walls and vertical airflow through floor or ceilings. All AireShare transfer fans feature a low profile, a quiet intake blower and unobtrusive grilles. With room-to-room models, the blower draws heated or cooled air into an open wall cavity and distributes it to an adjoining room through a streamlined air diffuser installed on the opposite side of the wall. The level-to-level model moves air up or down from one level to another through a sleeve that adjusts to a floor joist or truss.

Tjernlund Products Inc., 1601 Ninth St., White Bear Lake, MN 55110-6794; (800) 255-4208; www.tjernlund.com.