Electrical boilers are typically more efficient at converting fuel into heat than other designs, although their overall efficiency depends on the power source. The cost of using an electrical boiler varies depending on the cost of the electricity used to power the system.
Electrical boilers convert almost all of the power used into heat, although power plants vary in terms of efficiency. Losses incurred when converting fuel into electricity at the power plant, however, lower the overall efficiency to levels more comparable to single-building systems.
Those looking to save money need to determine the cost of on-site fuel compared to the cost of electricity, although fluctuating prices can make this difficult to determine over the long term.