P: (916) 922-2004 | E: JWagner@airconenergy.com

Sonoma County

Client Details

2300 County Center Drive, Santa Rosa,

Ca 95403

Project Cost:
Projected Annual Savings:
$3,621,226 $1,689,316
Capital Offset:
Payback Period:
$300,000 11.5 years
Financing Arrangements:
Lease Purchase


Following a rigorous qualification based selection process and the requirements of Government Code Section 4217, the Board of Supervisors authorized a contract with Aircon Energy to act as the County’s Energy Services Company for the purpose of conducting an Investment Grade Audit of County facilities as part of the County’s Climate Protection Action Plan. The Audit analyzed the energy usage of County facilities and proposed specific viable Energy Efficiency Measures to reduce energy usage. More specifically as the County’s partner, Aircon Energy’s role is to define, design, and implement potential energy efficiency and clean generation projects for the County, with the end goal being greenhouse gas emissions reductions from County operations and cost savings on utility expenses.

Aircon identified and evaluated over 100 potential energy-related water conservation, energy savings and self generation measures at County facilities. Based on this Audit, a scope of work for a Comprehensive Energy Project was developed that includes 38 of these Measures at 24 buildings. Improvements to the facilities include:

  • Chillers
  • Boilers and other Central Plant Equipment Replacements
  • Lighting Systems Design and Retrofit
  • Air Distribution Systems Upgrades
  • Automation and Control Improvements
  • Detention Flush Control
  • Laundry Water Conservation Devices

The crown jewel of the project is a 1.4megawatt fuel cell system that will provide electricity and hot water to the entire Sonoma County main campus. Fuel cells are among the cleanest, most reliable sources of power generation, providing continuous high quality power 24 hours a day, with ultra-low emissions and quiet operation. In addition to the electricity the heat byproduct is incorporated into the building heating feed water loop.

Project Results

  • Greenhouse Gas Emissions reductions estimated at 6,805 tons annually
  • Facility improvements and reduced capital liability
  • A Self Funding program that places no burden on the citizens of Sonoma County

The Sonoma County Comprehensive Energy Project was awarded the California State Association of Counties Challenge Award for outstanding innovation. To learn more about this award-winning project, please click here to watch a video produced by the California State Association of Counties (CSAC).

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