Title 24 is the California energy code.

Title 24 2022 Update-Impact on Single-Family Building

Performance Compliance:

New energy design rating (EDR) metrics – EDR1, Title 24 Compliance now require to meet EDR1, efficiency EDR2, and total EDR2 separately.

Prescriptive Compliance:

  • Space heating equipment must be a heat pump only in certain climate zone.
  • Water heating equipment must be an HPWH meeting certain criteria or a solar water heating system with an electric backup.
  • a gas instantaneous water heater in a certain climate zone is allowed if the space air conditioning unit is a heat pump
  • install a tankless electric water heater with point-of-use distribution is allowed in the new unit under 500 SF
  • a whole-house fan is not required in a new dwelling unit with a conditioned floor area under 500 SF