What is Boiler Cycling and why is it necessary for it to be controlled ?
An unnecessary series of boiler firing bursts to maintain the temperature of boiler and connecting pipework, under control of the boiler thermostat, is termed boiler cycling. This can happen when heating controls are not fitted or when the available controls are inadequate. Firing up a boiler requires a given amount of fuel, so a heating system will operate more economically if the number of cycles is reduced. Furthermore, since the life of boilers and pumps is related to the number of times that they are started up, and not to the total operating or heating time; they will last longer and maintenance will be reduced if the number of On/Off cycles is minimised.
