The hot water regulator acts as a mixer tap, a plumbing accessory which enables you to mix hot and cold water to achieve the desired temperature and improve user comfort in the shower.  All of the models in the range can be fitted with this system.  The hot water regulator is installed UPSTREAM using a bypass on the hot/cold water system (boiler outflow, garage or kitchen: at any point where there is a passage of hot and cold water).  The upstream installation means you only need to use a single pipe to feed into your shower, supplied with pre-regulated water (28-30°C).
The water will always be at a constant temperature no matter what the temperature is outside.  The temperature adjustment knob enables you to modify it according to the season.
This installation is extremely simple, and protects your children from exposure to uncontrolled hot water.