To earn the Energy Star, a home must meet guidelines for energy efficiency set by the U.S. Environmental Protection Agency. These homes are at least 15% more energy-efficient than homes built to the 2004 IRC and include additional energy-saving features that typically make them 20–30% more efficient than standard homes.
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HERS Testing The California Energy Commission is required by Public Resources Code Section 25942 to establish regulations for a statewide HERS Program to certify home energy rating services in California. The goal of the program is to provide reliable information to differentiate the energy efficiency levels among California homes and to guide investment in cost-effective
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