Beside natural gas, heat pumps have become popular. Ballpack a heat pump at about 1/3rd as much electricity for a given amount of heat, compared to a resistive

Beside natural gas, heat pumps have become popular. Ballpack a heat pump at about 1/3rd as much electricity for a given amount of heat, compared to a resistive heater. Even (larger capacity) hot water heaters come with heat pumps now.