alwitra rainwater outlets are optionally available with electrical heating (230V AC). The letter “H” in the name indicates the heating feature of the outlet. At the factory, the heating system is integrated into the rainwater outlets, consisting of a silicone heating mat protected against overheating by a built-in temperature switch. Connection to 230 V AC power supply is carried out with a thermostat without using transformers or the like.
For controlling, an energy-saving thermostat with an outdoor temperature sensor is used, activating the heating only when required. This is done at two adjustable switching thresholds. The thermostat is activated at the critical temperature range just above the freezing point. Thus, energy is consumed only when actually necessary. Irrespective of the number of heatable rainwater outlets installed, only one thermostat is required.