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is allowed to control the temperature of the room because it measures the temperature locally to it and is very good at maintaining

an accurate and stable temperature in the room. The reason for not letting the

Genius Room Thermostat or Genius Room Sensor do this fine control and the minute-per-minute control of the temperature and plunger position

of the valve is battery life. To maintain a steady temperature in a room the valve needs to measure the temperature every minute, and then adjust its valve position accordingly using TPI (temperature proportional integral) control. It does this by measuring the temperature of the water as well as the

air temperature locally to it. If every time it had to do this it also needed to communicate with another device in the room

to get that temperature, then the battery life of the

Genius Radiator Valve would be seriously depleted, or the temperature fluctuations of the room would be

considered large if we reduced the temperature sample rate of the valve.

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• If the room is reported to go above the target temperature (because the

• Genius Room Sensor or Genius Room Thermostat has sensed this for the room) then the room will turn blue on the app and the

• Genius App will stop that room calling for heat from the boiler. This is because the app is now trying to shut off the room as it has over heated.

For

rooms with more than one radiator

, the independence of the valves is a very good thing

, because if one end of a large room is colder than the other, then the valves will work

harder to heat the cold end of the room but will throttle back the warm end of the room. However, if the global temperature of the room were to over heat then

the room on the app would be shut off

because the

Room Sensor would pick up the global temperature for this room having gone above the target temperature.