Ventilation Rate If only a total heat exchanger is connected, set the ventilation rate from the home screen. The ventilation rate can be set in the user menu when linked with an air conditioner. How to set the ventilation rate Home screen The small number above displays the room temperature, and the icon below displays the ventilation rate. Be sure to operate with the remote controller turned on. 30 Change ventilation rate screen Press and , and the ventilation rate will change. 30 30 Result: The indoor unit changes ventilation rate. 30 15