Single Family

Related Measures

• Swimming Pool and Spa Heating

  This proposal includes measures for saving energy on pool heating: mandatory solar heating requirement for pools and spas, exploration of a variable-speed control installation requirement for pool pump systems, clean-up and clarification of existing requirements, and requirements for pool insulation.

• Compartmentalization and Balanced Ventilation / Indoor Air Quality (IAQ)

  This proposed measure would add a mandatory measure for all multifamily units (except garden-style units) to lower the compartmentalization tested leakage value and use supply-only or balanced ventilation as a whole dwelling unit strategy—in other words, use of exhaust-only ventilation could not be used for whole dwelling unit ventilation.

• Single Family Buried Ducts and Cathedral Ceilings – Buried Ducts is no longer being considered for the 2025 Code Cycle

  This measure proposes new prescriptive requirements in certain climate zones for higher levels of attic insulation and for ducts in the attic to be fully buried. A simplified verification approach is proposed along with updates to the value of duct burial in the compliance software. The mandatory requirement for R-4 roof deck insulation would also be exempted if ducts are buried. Additionally, this measure proposes to add a new alternative prescriptive compliance path for cathedral ceilings.

• Residential HVAC Performance

  This code change proposal includes a number of measures designed to improve the performance of Heating Ventilation and Air Conditioning (HVAC) systems in new and existing Single Family and some Multifamily residences. Most of the measures are designed to improve the performance of Heat Pumps (HPs), although in some cases the measures are applicable to other types of HVAC systems as well.

• Single Family High-Performance Windows and Walls

  This measure targets the thermal performance of the building envelope and evaluates savings potential and cost-effectiveness of high-performance windows in all California Climate Zones. This measure also proposes to increase the mandatory insulation requirements for exterior walls.