Sonoma County Water Agency
Saving energy with a geothermal retrofit

Geothermal Heat Pump Retrofit

Santa Rosa, California

Owner: Sonoma County Water Agency

404 Aviation Blvd.

Project Start: February, 2010

Project End: March 2012

SF Heated/Cooled: 18,853

Heat Pumps: 11

Ground Loops: 32 loops x 400 ft dp

System Size: 60 tons

This project provided a geothermal heat pump retrofit of an existing HVAC system at the Operations and Maintenance Building for SCWA. The previous system consisted of various sizes of packaged rooftop gas-electric units.

Project design features

  • 100% geothermal heating & cooling.

  • Removed all natural gas use from the site (reduced carbon footprint).

  • Specified building control systems for managing and monitoring building system performance.