Applicable Building Type(s)
Policy Requirement Level
Development Authority: California Energy Commission
Prescriptive Compliance path
All floors of a building, as measured at the floor level of the exterior surfaces of exterior walls enclosing the conditioned space
U-factors are prescribed by component, efficiency coefficient, construction material and according to California's 16 climate zones
Shading can be used to meet the solar heat gain coefficient requirements Optimal overhangs demonstrating that south-facing glazing is fully shaded at solar noon on August 21 and substantially exposed to direct sunlight at solar noon on December 21. (Low rise residential)
U-factors and SHGC are prescribed
Space Heating System
Systems must be certified by manufacturers as compliant with standards (some exceptions) Performance requirements are listed, based on TDV energy use.
Water Heating System
All systems must be certified by manufacturers as compliant with standards
Lighting and high efficacy requirements are prescribed according to room type
Space cooling, Space heating, Water heating, Ventilation
Performance Compliance path
Not a requirement. Performance based elements are based on a reference model and are relative to energy costs.