residential energy cost savings / annual energy cost savings / energy intensity / kBtu/ft2 source energy savings / quad residential source energy consumption / average baseline energy intensity / kBtu/ft2 baseline source energy consumption / residential source energy consumption / source energy use / water heating equipment / residential source energy savings / source energy consumption / energy use / source energy savings / energy consumption / energy intensity data / reduced energy consumption / energy cost savings / annual source energy savings / source energy / local building energy codes / quad commercial source energy consumption / energy savings / residential energy use data / energy / code-relevant systems / /