Tjernlund AS1 AireShare Room-To-Room Fan Ventilator, Hardwired,70 CFM

Transfer air through interior walls from room to room Use with ductless cooling and heating to transfer comfort to adjacent rooms Quiet, low watt blower. Dimensions - Diffuser:3 inches x 15 1/8 inches (flush), Diffuser Rough Opening: 1 1/4 inches Height x 13 5/8 inches Width Blower Grille: 7 3/4 inches x 15 3/4 inches (flush) Blower Rough Opening: 4 7/8 inches Height x 13 7/8 inches Width Staggered intake and discharge stop light and reduce room to room sound transfer Requires hard wiring to 120 VAC. Requires wall switch or thermostat (not included)