A leading London University installed eTRV+ with PAIR in their student halls of residence and made energy savings of 30%. The University had been using their building management system to control the heating, with temperature control via TRV’s in each bedroom, the kitchen and corridors. The system provided two heating periods, switching on in the morning and evening and remaining off in the afternoon and overnight. eTRV+ was initially fitted in student’s bedrooms, and then extended into corridors and kitchens to provide balanced temperature control throughout the building. Bedrooms and were set to 19°c, with the boost facility to 21°c. Corridors were set to 16°c and kitchens to 19°c. PAIR was installed in bedrooms to detect occupancy. If a student left their room for longer than one hour, eTRV+ would decrease the temperature to the low setting (16°c). eTRV+ includes a Sleep facility, that provides the option to reduce heating further during longer period...

A thermostatic radiator valve (TRV) is a self-regulating valve fitted to hot water heating system radiator, to control the temperature of a room by changing the flow of hot water to the radiator. The classic thermostatic radiator valve contains a plug, typically made of wax (forming a wax motor), which expands or contracts with the surrounding temperature. This plug is connected to a pin which in turn is connected to a valve. The valve gradually closes as the temperature of the surrounding area increases, limiting the amount of hot water entering the radiator. This allows a maximum temperature to be set for each room. As the valve works by sensing the temperature of the air surrounding it, it is important to ensure that it is not covered by material (such as curtains). If the controller is removed from the valve the valve turns on and the radiator will always be hot. TRVs should not be installed in the same room where the boiler thermostat is installed. The replacement of a manual heat...