Helios 8157 FDR humidity difference control

Humidity difference control consisting of an internal control and an external sensor, the humidity difference control FDR automatically ensures the optimal room humidity and thus solves problems with damp rooms in the long term, the system continuously measures temperature and humidity inside and outside, the intelligent control decides whether suitable conditions for ventilation exist for optimal functionality at all times, easy operation via an intuitive app, IP20 (external sensor IP54)