Quality of thermostatic control

This benchmark provides a measure of the schools’ thermostatic control, and the savings potential if thermostatic control is improved.

Energy Sparks calculates the quality of a school's thermostatic control using a measure called 'R2'. The heating consumption of a school should be linearly proportional to the outside temperature, the colder it is the more energy is required to keep the school warm. The 'R2' is a measure of how well correlated this heating consumption is with outside temperature - the closer to 1.0 the better the control. Any value above 0.8 is good. If a school has a value below 0.5 it suggests the thermostatic control is very poor and there is a limited relationship between the temperature and the heating used to keep the school warm.