Heat pump that saves electricity bills Compared with heating systems of boilers (electricity, fuel) and air source heat pumps, water source heat pumps have obvious advantages. Boiler heating can only convert 90% to 98% of electric energy or 70% to 90% of fuel internal energy into heat for users to use. Therefore, ground source heat pump saves more than two-thirds of electric energy than electric boiler heating Fuel boilers save more than half of the energy