The California Energy Commission requires certain "energy measures" be inspected and tested by a third party inspection company. HVAC Rater Service and our affiliate raters are the companies that serve the San Francisco East Bay Area, Sacramento Area and the Coachella Valley. When a consumer replaces heating or cooling equipment in specified climate zones within California, they may be required to have a HERS rater verify such things as: Duct Testing Refrigerant Charge Measurement Airflow and more! Please check out our website for more information or give us a call.