The Northwest Energy Efficiency Alliance (NEEA) contracted with Ecotope, Inc. and Cascade Engineering Services Inc., to conduct a laboratory assessment of the General Electric (GE) GeoSpring model # GEH50DEEDSR hybrid heat pump water heater (HPWH) for northern climate installations. Cascade Engineering evaluated the GeoSpring using a testing plan developed by Ecotope to assess heat pump water heater performance.