What advantage is there in being able to maintain central heating temperatures within very tight limits ?
Many thermostats are not able to maintain room temperature to within less than two or three degrees; a good one will keep it within a degree and an electronic thermostat can be expected to keep the temperature within around half a degree of the temperature at which it is set. This is not good enough. A person who sets a thermostat to bring on the heating at the point where he or she feels uncomfortable will feel too warm when the temperature rises a degree above the level that has been set. Overheating in this way results in waste of fuel, but it also gives rise to frustration when it becomes necessary to vary temperature settings during a day, or during an evening, because one is not comfortable. The DCD Heating Controller optimises boiler firing and smooths out heating fluctuations, so that the temperature is kept to within a tenth of a degree of that set. When heating is required, radiators are warmed to give out the heat that is needed, the colder the weather the warmer the radiato
