- Heat pumps can help save the planet. But can they save you money? A heat pump can turn 1 kWh of electricity into up to 4 kWh of heat. Because a heat pump is moving heat, instead of creating it, it can reach efficiencies of 300 or 400 percent. https://grist.org/climate-energy/heat-pumps-can-help-save-the-planet-but-can-they-save-you-money/ 187 comments energy