2019 TITLE 24 ENERGY STANDARDS
PLANNED EFFECTIVE DATE: January 1, 2020
The major change is dialing back the prescriptive allowed lighting power allotments. The new LPDs (Lighting Power Densities) will be around 50% to 70% of the 2016 code’s LPDs, depending on space type classification. The reductions in LPDs are a reflection of the popular adoption of LED lighting technology.
Relatively minor mechanical system changes, almost no envelope changes.
The major change is the advent of “net zero energy” residential buildings, as mandated by state law. This new iteration of the energy code requires individual solar electric (photovoltaic, or PV) systems, or “community” solar electric systems (with certain exceptions where such system are not practical). PV systems must be sized to meet the estimated annual electric load. Compliance “credit” will be obtained for buildings that incorporate battery systems for their PV systems.
California now realizes that natural gas, while historically a preferred choice among “conventional” energy sources, is not sustainable and not helpful in meeting the state’s climate change goals. The energy code will therefore start to encourage all electric buildings, using heat pump technology. In this regard, the 2019 code has now defined an acceptable heat pump type water heater that meets the definition of “standard” DWH.
Other than better accommodation of heat pump water heaters, relatively minor mechanical system changes. Almost no envelope changes, other than a small increase in prescriptive window energy value stringency.