Fixed setpoint control
The Gira hygrostat can be set to fixed setpoint control on the back of the device in order to prevent unauthorised modifications to the humidity setpoint value, for example in rental flats or public buildings. The setpoint value is then permanently set to 60 % relative humidity, regardless of the position of the rotary knob on the front of the device.
For optimum operation, the installation location should be at a height of approx. 1.5 m, free of direct exposure to sunlight, draught air or heat radiated from electrical devices, and it should not be directly in the radiation area of heaters. It is also recommended not to install the Gira hygrostat in a unit with electrical devices that produce heat (e.g. dimmers). A moisture-absorbing surface (e.g. sheetrock) can affect the control behaviour, and therefore installation on a surface that does not absorb moisture is recommended, such as tiles. In bathrooms spacing must be observed in accordance with DIN VDE 0100-701.