"The AireShare room-to-room ventilator quietly moves heated or cooled air from one room to another to enhance comfort and improve circulation. Pull cool air from floor level or warm air from ceiling level and distribute it high or low. Ideal for homes with wood stoves, space heaters or window air conditioners. U.S.A. Works With Homes w/wood stoves, space heaters or window air conditioners, Control Type Manual/automatic, Includes 1 Blower, 1 Grille, 1 Diffuser, 1 Installation hardware pack, 1 Template sheet, 1 Instructions, Mount Type Wall. Moves heated or cooled air from one room to another to improve comfort Corded model plugs into adjacent wall outlet that is concealed behind grille On/off switch Efficient blower Whisper quiet low tone fan cross flow blower 50 quieter than any other through-wall fan Ventilates a 12ft. x 15ft. room in only 20 minutes Diffuser can be mounted in either top or bottom of wall cavity Classic style blends with any decor Easy to install in any unobstructed interior wall with studs 16in. on center"