The FED sensors are used in applications in which a cooling and a heating circuit are to be controlled by one controller. Both FED-IF and FED-FF sensors can be applied to chilled ceilings, fancoils and induction units. For control of cooling and heating circuits in fancoil and induction units use the FED-FF with remote sensor. By placing the sensor in the air inlet a quicker reaction time of the air temperature changes is achieved. Using the remote sensor, the remote temperature adjuster can be placed directly on the cabinet.