Heat Pump Water Heater cost savings - GreenBuildingAdvisor

Heat Pump Water Heater cost savings modaby | Posted in Energy Efficiency and Durability on April 5, 2026 03:12pm Hi GBA Community, I am trying to help a client determine if a heat pump water heater or a standard electrical water heater is best for their budget / long term savings.  Part of this discussion is the payback period on the HPWH up charge versus the energy savings.  I know the unit and install cost difference between the two. Now I need to determine the estimated energy cost savings of HPWH. Can someone help me with the calculation for annual electrical energy operating cost for a typical family? Here is what I know:-The HPWH has a UEF of up to 3.45-The electric WH has a UEF of 0.92– The current average electrical rate here in Portland, OR is $0.20 KWH The two units we are comparing are:– State HPX50DHPTNE 50gal Heat pump water heater 63″ x 22″– STATE 50GAL EE6-50-DURT TALL ELECTRIC WATER HEATER What is the calculation I should be using? Thanks in advance for the help! Answer GBA Detail Library A collection of one thousand construction details organized by climate and house part Search and download construction details Join the leading community of building science experts Become a GBA Prime member and get instant access to the latest developments in green building, research, and reports from the field. Start free trial Related Questions Heat Pump Water Heater Placement Understanding Heat pump Water Heater Specs ROI: Heat-Pump Water Heater vs. Electric Water Heat...