Thru-Wall Room to Room Fan

Thru-Wall Room to Room Fan Easily move the heat from a fireplace or cool air from a window air conditioner to an adjacent room Room-to-room fan easily vents rooms that always seem stuffy or smoky Variable speed controller lets you decide how powerful to make the airflow Dimensions: 12.5" x 10" x 5 1/8" Wall Width: 3.75"-6.5" thick <<< Check Price & Full Review. >>>