The E811 is a high quality vandal-resistant two stage set-back tamperproof thermostat designed to accurately control fan convectors in schools and public or commercial buildings to within 0.5°C.

The E811 has two stages of control. Below a 3°C fixed temperature offset down from the chosen temperature setpoint, the thermostat will select the high-speed fan to bring the room quickly up to temperature. Once the unit has achieved this level it then switches to the low-speed fan for normal daytime use, regulating the room temperature up to the pre-selected temperature setpoint.

Once the room temperature eventually reaches the chosen temperature setpoint the fan is turned off. This makes for quieter operation during normal daytime occupancy periods with the added benefit of rapidly bringing the room up to temperature when the heating is initially switched on.

The thermostat also provides set-back functionality. The end-user can use the pushbutton on the side of the unit to select between two different temperature setpoints. LED indicators illuminate to clearly identify whether the High or Low temperature setpoint is selected. The 3°C fixed temperature offset for the 2-stage control is maintained relative to the selected temperature setpoint.

Robust Range Variants:
Remote Sensor (/RS)
Remotely located temperature sensor.

*For a full description please see relevant variation below.