The statewide Reach Codes Program has published the new 2022 Single Family New Construction Cost Effectiveness Study, which documents cost-effectiveness analysis results for traditional new detached single family and detached accessory dwelling unit (ADUs) building types.
This analysis uses two different metrics to assess cost effectiveness of the proposed upgrades: 1) Customer-based lifecycle cost (LCC) approach that values energy based upon estimated site energy usage and customer utility bill savings, or "on-bill" and 2) the Energy Commission LCC methodology, intended to capture the total value or cost of energy use over 30 years, referred to as Time-Dependent Valuation or TDV. The analysis used the two prototypes defined by the Energy Commission, a 3-bedroom, 2,100 ft2 1-story home and a 3-bedroom, 2,700 ft2 2-story home. The ADU prototype is a detached, 1-bedroom 625 ft2 structure.
The Reach Codes Team evaluated three packages for mixed fuel homes and five packages for all-electric homes for each prototype and all 16 California climate zones (CZs). Packages include combinations of efficiency measures, on-site renewable energy, and battery energy storage:
Key findings are summarized here, while complete findings are available in the full report.
The full report includes comprehensive results tables as well as complete descriptions of incremental cost assumptions. The no-cost study can be downloaded here.
October 4: Energy Commission 2022 EPIC Joint Symposium.
October 5: Energy Efficiency Day. https://energyefficiencyday.org/
October 6: 3C-REN training: 2022 Energy Code: Existing Buildings, Additions, and Alternations
October 12: Energy Commission Monthly Business Meeting
October 19: Central Coast Sustainability Summit. UC-Santa Barbara.
October 20: 3C-REN Training: 2022 Energy Code: Accessory Dwelling Units (ADUs).
October 25-27: VERGE 22. San Jose.
October 26: BayREN & Energy Code Ace: On-Line Training: Residential Energy Standards - Accessory Dwelling Units (ADU)
This column is a monthly feature focusing on specific topics of interest to newcomers to the reach code development community.
This month, we’re looking at some of the new aspects of the 2022 Building Energy Code that reach code professionals will need to keep in mind as they move forward with planning local jurisdiction amendments. One of the most impactful developments in this cycle is the move to three compliance metrics for new construction. A design must satisfy all three, which are computed in the State-approved compliance software and are reported in the compliance documents.
For single-family new construction, these metrics are expressed as Energy Design Ratings (EDRs), an abstract scale wherein lower values represent lower energy consumption. There are three different EDR metrics in the new 2022 State Energy Code:
For multi-family and nonresidential new construction, the three metrics are expressed as:
As local jurisdictions explore different reach code approaches, these requirements may impact the choices each jurisdiction makes. For instance, an approach that amends the California Energy Code (Title 24, Part 6) would need to meet a cost-effectiveness assessment to become legally enforceable and these compliance metrics would also be in play for new construction projects. A different approach, such as a measure amending a municipal health and safety code, would not trigger the use of these compliance margins or the cost-effectiveness requirement. A third alternative, adopting specific aspects of the California Green Building Code, Title 24, CALGreen, would require new construction projects to meet a different energy performance margin and install specific prerequisite measures from a prescribed list of measures.
The statewide Reach Codes Program is available with a wide range of resources and technical assistance to work with local teams to help identify the best approach for that community. Visit localenergycodes.com or email firstname.lastname@example.org for specific assistance.
A statewide panel of reach code professionals joined on Thursday, September 22, 2022 for a lively discussion of reach code issues at the 13th Annual California Climate and Energy Collaborative (CCEC) Forum.
Moderator Misti Bruceri led a highly interactive conversation that ranged from statewide to local perspectives, looking at the reach code development and adoption process with an eye toward sharing insights that would enable attendees to accelerate their own processes.
Statewide perspectives were provided by Danuta Drozdowicz, Energy Specialist with the Efficiency Division of the California Energy Commission, who is responsible for coordinating approval process of local reach code measures by the Commission, and Lawrence Garber, Program Associate with the Building Decarbonization Coalition, who shared valuable insights from the annual survey conducted statewide for jurisdictions implementing reach codes.
Local perspectives came from three professionals with jurisdictions across the state, each of whom spoke to a specific stage in the process. Cora Panturad, Sustainable Infrastructure Analyst with the County of Monterey, shared her team’s experience with the beginning stages of the process, focusing on outreach and identifying and developing reach code language. Crystal Najera, Sustainability Manager for the City of Encinitas, shared insights about her community’s experience with the development and adoption of its reach code. Demian Hardman-Saldana, Senior Planner, Sustainability & Energy for Contra Costa County, spoke about implementation aspects of adopted reach codes. The free-flowing conversation included insights from attendees as well as numerous questions.
Some of the panel's tips and takeaways included:
The session materials will remain available on the Whova platform for Forum attendees.
The statewide reach codes program also staffed a table at the Forum to chat with attendees and provide an overview of available resources.
This program is funded by California utility customers and administered by Pacific Gas and Electric Company, San Diego Gas & Electric Company (SDG&E®) and Southern California Edison Company under the auspices of the California Public Utilities Commission and in support of the California Energy Commission.
© 2021 Pacific Gas and Electric Company, San Diego Gas and Electric Company and Southern California Edison.
All rights reserved, except that this document may be used, copied, and distributed without modification.
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