Identifying Reach Code Priorities for 2022 Code Cycle
As fall 2020 approaches and development of the 2022 Building Energy Code intensifies, the Codes and Standards program has published reports documenting the energy savings and GHG reduction potential for several measures being considered for inclusion in the 2022 Energy Code. The reach code team is actively researching the studies and has identified several potential reach code measures. These measures are distinct requirements that apply to specific occupancies or end-use systems, and either require minimal or no change to the compliance documentation and process. The team is seeking city and county staff input to help prioritize the measures of most interest that may be good candidates for a potential reach code. Establishing local priorities early helps the team focus on delivering the most valuable resources as quickly as possible to local jurisdictions examining potential measures throughout 2021 and beyond. Building Code in 1972, which eventually was the basis for California’s Title 24 requirements and Energy Code.
The City sustainability staff focused on developing and implementing its current package of reach codesto extend these codes beyond the statewide 2019 Building Energy Efficiency Standards and help the City achieve aggressive new goals. In March 2019, the City Council approved a Resolution declaring a climate emergency and proposed mobilization efforts to restore a safe climate that included an acceleration of the carbon neutrality goal for the Davis community from 2050 to 2040.
Some of these measures include:
Horticulture: Improved mandatory lighting efficiency and controls
This package of measures applies to Controlled Environment Horticulture (CEH) facilities, indoor farming operations that tightly control lighting, temperature and humidity levels. The measure focuses on improving the lighting system to save energy and enhance plant growth. The measure proposes a mandatory requirement for minimum photosynthetic photon efficacy as well as requiring time-switch controls and multilevel lighting controls in CEH facilities. For more information on this measure, download the CASE proposal.
For nonresidential and high-rise residential construction, the City adopted a set of provisions focusing on holistic approaches like those found in building rating systems such as LEED (Leadership in Energy and Environmental Design) as well as CALGreen (Title 24 Part 11), the 2019 Building Energy Efficiency Standard (Title 24 Part 6) and the Davis Municipal Code. “By developing a set of measures that essentially requires new construction to achieve this holistic level of compliance, the result is a LEED Gold equivalency,” notes Greg Mahoney, Assistant Director, Community Development & Sustainability.
Nonresidential Refrigeration System Opportunities
There are several measures in this code change proposal that will improve energy performance end reduce greenhouse gas (GHG) emissions from refrigeration systems in refrigerated warehouses, retail stores, and commercial kitchens. Requirements for systems in commercial kitchens could apply to a variety of building types including restaurants, schools, and hospitals. Detailed information is available in the CASE Proposal.
Later in 2019, the City team turned its focus to primarily residential construction. Mahoney noted, “for residential construction, we recognized the opportunity to incentivize all-electric homes while still providing a compliance pathway for mixed-fuel use. We did this by requiring no additional provisions for all-electric homes while adding requirements for mixed-fuel construction.”
This proposal includes two submeasures of interest: nonresidential lighting zone reclassification and nonresidential lighting power allowances for general hardscape.
The lighting zone reclassification submeasure would align the California lighting zones with current industry standards employed across North America and reduce energy use throughout California while minimizing sky glow and light trespass. The general hardscape submeasure would update the existing prescriptive requirements for outdoor lighting, and would impact new construction, alterations, and additions across California. For information on this set of measures, download the CASE proposal.
Prioritization Survey Available in September
In all, the statewide Codes and Standards Enhancement (CASE) initiative has developed more than 40 candidate measures to be considered for inclusion in the 2022 State Energy Code. Based on its review of the proposals, the reach code team has identified several potential candidates. The team is developing a survey to poll city and county professionals to assess which measures might be most valuable to develop as potential reach code provisions. The team anticipates the survey will be available in September.