The E815/ADJ is a robust tamperproof thermostat which accurately controls heating or air conditioning within a selectable temperature range between +16°C and +26°C in conjunction with an adjustable hysteresis (differential) of anything between 0.25°C and 5°C.

The temperature setpoint is adjustable by the end-user by -2°C to +2°C from the setpoint programmed at installation. This provides satisfaction to the end-user as they can have an input to the room temperature but also provides significant savings to the bill payer as they are able to permanently limit the maximum temperature the end-user is capable of selecting.