Electricity can be two to three times as expensive as gas! Therefore, heating a space or heating water with electricity can cost two to three times as much as doing so with gas. Electric-to-gas switching is only advantageous in certain situations where central boilers/furnaces can be installed and re-piping can be kept to a minimum. Nonetheless, switching to gas a heating system if your building heats a significant amount of water or space with electricity may be worthwhile.