• Delta

Programmable differential thermostat, having 2 inputs and 1 output, specialized for heat exchange between solar collector and boiler.

• Trio

Programmable differential thermostat, having 3 inputs and 2 outputs, specialized for heat exchange between solar collector and boiler.

• Alpha

Programmable thermostat, having 1 input and 1 output, universal, suitable for every type of heating system.