EDF3 electronic wall control that manages the home's ventilation system with a single 'push' of the button. This control activates the system on 3 possible modes of operation with a 4th option for turning off the fresh air appliance. These modes include: ECONO mode, 20 MIN/H 20 mode, CONT mode, OFF or Standby modeECONO mode initiates continuous operation of the fresh air appliance in ventilation mode at low or medium speed. 20 MIN/H mode tells the fresh air appliance to run in intermittent mode for 20 minutes, 40 minutes, or in recirculation mode (if applicable). CONT mode activates the fresh air appliance to run at a continuous high speed in ventilation or in recirculation mode. OFF mode leaves the appliance inactive at operator discretion.The fan speed has 3 settings: Reduced, Medium, and Normal or 20min/h.Manufactured with the customer in mind, this controller works with all Fantech fresh air appliance models.