SMTI is proud to announce that a 4th generation GHPWH prototype was installed in a home in Birmingham, Alabama (serving a family of four). SMTI, with an OEM partner for the storage tank, fabricated and tested the prototype prior to installation. Gas Technology Institute is providing M&V (including baseline) and overall project management. The new 65 gallon heat pump replaces a standard efficiency gas storage tank model, and aims to reduce water heating energy usage up to 50%.