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Electric Boilers

Flow Boilers

Flow boilers, such as the EHC Fusion Comet boiler, provide an electric central heating option for your home. Electric flow boilers are allocated to the Super heat tariff and benefit from 18 hours of low rate unit cost and 6 hours of normal rate unit cost. Using your central heating programmer, it is advisable to set your heating times for the low rate times to help keep your heating bill to a minimum. It is then up to you as the customer to set the temperature on the central heating thermostat, as well as adjusting the temperature of each individual radiator by using the radiator TRV’s (thermostatic radiator valve).

Flow boilers can heat the property’s domestic hot water so long as you have an indirect hot water cylinder connected to the flow boiler. On this system, the flow boiler can circulate hot water through the hot water cylinder’s primary coil which in turn heats the water in the cylinder up to the desired temperature.

Click here for more information on how to best use your Flow Boiler.

Combination Boilers

Combination water heaters, such as the Heatstor cylinder, provide your home with heating and hot water from the same vessel of water. The water is automatically heated for 18 hours every day on a low rate within the Superheat tariff. For the remaining 6 hours of the day on the normal rate, the heating elements are switched off automatically.

To make sure that you have sufficient hot water in the cylinder while the normal rate hours are in operation, it is advisable to run your central heating for at least 1 hour before the meter turns the cylinder off. This can be set up on the central heating programmer that was installed with your boiler. It is then the responsibility of the customer to set the temperature on the central heating thermostat, as well as amending the temperature of each individual radiator by amending the settings on the radiator TRV’s (thermostatic radiator valve).


To discuss home or commercial heating options with one of our experienced energy advisers, or to arrange a FREE site survey please call 241984 or email