Suncourt TW108 ROOM TO ROOM Air Transfer Fan. Balances temperature in adjoining rooms quiet and efficiently. Telescoping housing. 2 Speed Control 110 - 60 CFM. The Room to Room Air Ventilator Fan is often used in conjunction with PTAC units, Mini-Split Air Conditioning, Wood Fireplaces, Wood Stoves, Window Air Conditioners and other Heating and Air Conditioning systems.