The major residential energy-savings measures adopted include:

 

 

 

 

 

 

Credit: California Energy Commission

The major residential energy savings measures include:
• High-performance walls: The standards would require increased wall insulation in most climate zones. These levels can be met with a variety of construction assemblies, including both 2x4 and 2x6 construction.
• High-performance attics: The standards give builders the options to either increase attic sealing and insulation or move ducts into conditioned space (either by installing a ductless system or placing ductwork in parts of the home that are already heated and cooled).
• High-performance lighting: The new standards will cut lighting energy in homes by almost half by requiring a high-efficacy bulb (such as a CFL or LED) in every socket. The standards also sets quality performance requirements to ensure that these bulbs meet consumer expectations. The standards provide builders flexibility by allowing screw-based bulbs for most socket-types.
• Water heating: The new standards require the use of an instantaneous tankless gas water heater, which saves energy by heating water on demand rather than storing it in a tank, or one with equivalent energy performance.