Heat Pump Hot Water Heaters
Although they cost a bit more than standard electric or propane water heaters, heat pump water heaters easily pay for themselves in annual energy cost savings. In addition, compared to standard electric and propane water heaters, they reduce carbon dioxide emissions by 60-70%. Compared to Energy Star natural gas water heaters, HPWHs are much more efficient and reduce CO2 emissions by about 50%, and the annual heating costs are about the same.how it works
Compared to electric resistance water heaters, Energy Star heat pump water heaters (HPWHs) consume about 1/3 as much energy, reducing your annual energy costs for hot water by 67%.
Compared to Energy Star propane water heaters, HPWHs are about five times as efficient, reduce annual energy costs by 75%, and reduce carbon emissions by 60%.
Compared to Energy Star gas water heaters, heat pump water heaters are about five times as efficient, with 50% less carbon emissions, and have about the same annual energy costs.