How does the controller manage to save fuel without making economies that affect comfort ?
There are three main ways in which the controller saves fuel. Firstly, Optimum Start on every programme, for both heating and hot water heating, ensures that heating is never started earlier than is necessary to provide the selected temperature at the right time, whatever the weather or hot water requirements may be. This enables significant savings to be made with heating in Spring and Autumn, and with hot water in the Summer. Secondly, maintaining tight temperature control to within 0.1C degrees prevents fuel waste caused by the overheating which occurs in systems with a conventional thermostat, or with a sensor that is not operated with temperature smoothing optimisation facilities. These systems will allow temperature fluctuations by a degree above the set level, or even more in many cases. Since people endeavour to set a heating temperature at which they will feel comfortable, all heating above the level set is waste. Thirdly, programmed control enables temperatures to be maintain
