Table 151-D is divided into the 16 unique California Climate Zones with their own specific building component requirements per climate zone. ft.  free ventilation area of attic ventilation for every 150 sq. The 2016 Standards took effect January 1, 2017. HVAC Sizing Though there are no limits to the actual size of the heating and cooling equipment of your next project, Title 24 does require that you properly calculate the heating and cooling load of your project. Climate Zone. TITLE 24, PART 6, AND ASSOCIATED ADMINISTRATIVE REGULATIONS IN PART 1. Page C-2 Appendix C - Climate Zone FIGURE 100.1-A—CALIFORNIA CLIMATE ZONES . Title 24 calculations for all California projects, energy calculations, title 24 energy compliance forms, CEPE certified Title 24 energy consultants, experienced, low rates, fast turnaround. In our example we are using tile roofing with a weight greater than 5 lb/sq. Title 24 is the section of the California Code of Regulations which sets the Building Standards Code for the State of California. Come be part of creating a clean, modern and thriving California. Initial solar reflectance value is available from the CRRC (let’s assume an initial solar reflectance value of 0.77). The Title 24 prescriptive compliance approach requires a radiant barrier in climate zones with significant cooling loads (zones 2-15). Longitude: 117.38 W . Alturas CALIFORNIA BUILDING CLIMATE ZONES South Lake Sacramento Fresno Bakersfield Barstow W E S 50 50 100 Miles SYSTEMS ASSESMENT & FACILITIES SITING DIVISION T:\Projects \CEC\Mexico\MX Border.apr VIEW: CZ Building B&W 8.5X11 LAYOUT:CZ Building B&W 8.5X11 (Excerpted from the CEC Title 24 website) The cool roof requirements vary depending on the climate zone. For Example; Sacramento is Cl imate Zone 12, San Francisco is Climate Zone 3 and Lake Tahoe is Climate Zone 16. Then, determine the weight of the roofing material. Nonwhite pigments with high near-infrared (NIR) reflectance historically have been used to camouflage military surfaces (by mimicking foliage) and to minimize solar heating of dark exterior architectural surfaces, such as colored vinyl siding and gray battleship hulls. Cool roofing materials now come in a wide variety of materials and colors. If one of the exceptions below applies then the cool roof requirements are not triggered: 1. For climate zones 11 and 12 simply look across the table and then follow each column down the list for the minimum required energy feature. Buildings in Climate Zones 10, 11, 13 and 14, R-3 or greater roof deck insulation above a vented attic, or, 5. All 16 climate zones are listed in this table across the top of the table. Each zone has a different energy efficiency requirement. 2. Elevation: 840 ft . A radiant barrier is installed in the attic meeting the radiant barrier requirements of section 152(f) 2 of the Title-24 Standards, or. The prescriptive tables divide roofing materials into two weight categories. The California Energy Commission adopted building standards that require solar photovoltaic systems starting in 2020. Compare that to the seven zones the U.S. Department of Energy uses for the entire country. 3. Documents and training information to help building communities and enforcement agencies comply with the Building Energy Efficiency Standards. (California) Coefficient of Performance, Cooling (COP) These requirements apply to nonresidential, high-rise residential, and low-rise residential buildings across California’s 16 climate zones. Climate Zones 1-5 and 8-16 Wall assemblies must not exceed a maximum U-factor† of 0.051 Climate Zones 6 & 7 Wall assemblies must not exceed a maximum U-factor† of 0.065 Mineral Wool Performance Attic Options Any attic insulation not listed under “Prescriptive” must use Performance options (e.g., unvented attics, or attics Basic Climate Conditions ft. That is your Cool Roof specification for your roofing product. In addition, whatever roofing product you select must meet these numbers and be certified by the Cool Roof Rating Council, (CRRC). Buildings with no ducts in the attic, or, 2. The Energy Commission established 16 climate zones that represent a geographic area for which an energy budget is established. Climate Zone Assignments by Zip Code Building Energy Efficiency Standards - Title 24 The state of California is divided into 16 different climate zones. Wall energy performance criteria in Title 24 require meeting certain R-values and U-factors. ft., whichever is less is replaced. Next, determine your roof slope. Zone exhaust and makeup airflow rates shall be capable of reducing to regulated minimum circulation rates or rate necessary to maintain pressurization, whichever is larger . Manual describes each climate zone boundaries and list most California cities with its associated climate zone number. The 2016 Building Energy Efficiency Standards apply to new construction of, and additions and alterations to, residential and nonresidential buildings. DECEMBER 2018 ... that vary by climate zone (of which there are 16 in California) and building ... JA2 – Reference Weather/Climate Data . ft. or greater than 5 lb/sq. The most common way of installing a radiant barrier is to use roof sheathing that has a radiant barrier bonded to it in the factory. We’ve posted a helpful compilation in pdf format of all the relevant Cool Roof Title-24 code references including Table 151-D. These energy budgets are the basis for the Title 24 energy standards. The cool roof requirements for re-roofs are the same as for new construction and use the same values from Table 151-D noted above. The California Energy Commission updates the standards every three years. To standardize Title 24 calculations and to provide a basis for presenting the criteria, the California Energy Commission has established 16 climate zones which are used with both the low-rise residential and the non-residential Title 24 energy standards. The performance approach does not require a radiant barrier in any climate zone. The Climate Zone Map, and its implications on the cost-effectiveness of implementation, must be reviewed if a local government wishes to adopt local standards for energy efficiency beyond those set by Title 24 and have those standards approved and made enforceable by the CEC. The 2019 Building Energy Efficiency Standards improve upon the 2016 Energy Standards for new construction of, and additions and alterations to, residential and nonresidential buildings. Zone 1 is the coldest; zone … If the three year aged solar reflectance value is not available from the CRRC, then you can input the initial solar reflectance value from the CRRC into the calculation listed below which will assume an aged solar reflectance for the cool roof material. This table outlines all of the residential prescriptive requirements, including the cool roof requirements. As of January 1, 2010, the California Energy Commission’s updated Title-24 Building Energy Efficiency Standards for residential and non-residential roofing are now in force, otherwise know as “Cool-Roof”. First, determine which climate zone your project is located in, 1 thru 16. Existing ducts in the attic are insulated and sealed and HERS tested according to section 151(f) 10, or, 6. Of 24 climate zones defined in the Sunset Western Garden Book and the 20 zones defined by the United States Department of Agriculture (USDA), California has 20 and 16, respectively. 2×4 @ 16″ OC framing – R15 cavity insulation AND R-8 continuous (in most Climate Zones). Refer to the requirements for each building envelope area, based on your project’s Climate Zone IECC 2015 Requirements by Climate Zone 3. The following list of Climate Zone assignments by ZIP code is provided for the convenience of local jurisdictions electing to take this approach. There are exceptions to both residential and non-residential requirements. 75 in all climate zones. Careers. The climate zones are based on energy use, temperature, weather and other factors.This is explained in the Title 24 energy efficiency standards glossary section:"The Energy Commission established 16 climate zones that represent a geographic area for which an energy budget is established. The cool roof requirements vary depending on roofing material weight. ft. on a steep slope roof (greater than 2:12) and for climate zone #8 the cool roof requirements are an Aged Solar Reflectance of 0.15 and a Thermal Emittance of 0.75. A roof with a high solar reflectance (ability to reflect sunlight) and high thermal emittance (ability to radiate heat) stays cool in the sun, reduces demand for cooling power in conditioned buildings, and increases occupant comfort in unconditioned buildings. to adjust the Title 24 climate zone weather data to match the ASHRAE design day conditions for a specific city. Building Energy Efficiency Standards - Title 24 2022 Building Energy Efficiency Standards Climate Zone tool, maps, and information supporting the California Energy Code Appendix C. Energy Standards Climate Zones; Appendix D. Demand Responsive Controls; Categories Topic. Cool roof requirements for residential and non-residential now apply to low-slope and steep-slope roofs. If the building can show compliance using the performance approach (Title-24 calculation), The new 2008 Title-24 Manual and the separate Standards and Appendix all refer to the Cool Roof requirements but these references and tables are spread out in all three documents making it difficult to locate specific facts and figures. Building Energy Efficiency Standards - Title 24 Contact. Cool roof requirements are triggered when either 50 percent of the roof area or more than 1,000 sq. Buildings whose permit applications are dated on or after January 1, 2020, must comply with the 2019 Standards. Determine your climate zone. The ages solar reflectance and thermal emittance requirements will vary, depending on the slope of the roof, climate zone, and the density of the roofing product. Complying with Title 24. 2019 Building Energy Efficiency Standards, News Release: 2019 Building Standards Adoption. The new Cool Roof requirements affect new construction, significant repairs of existing roofs, re-roofing, plus additions and alterations of existing buildings and homes. Input intial solar reflectance value into the equation. Each zone has a different energy efficiency requirement shown as a “U-factor”. Less than 5 lb/sq. First look across the top row to find your correct climate zone for your project location. Buildings with at least R-30 ceiling insulation or, 4. Email or call Toll-free in California: 800-772-3300 or Outside California: 916-654-5106 for any 2019 worksheets, Building Energy Efficiency Standards - Title 24, Toll-free in California: 800-772-3300 ft. of attic floor area, and where at least 30 percent of the free ventilation area is within two feet vertical distance of the roof ridge; or, 8. HVAC Prescriptive Threshold for Economizers The economizer requirements for the 2019 BEES … In developing and implementing Title 24 building energy efficiency standards, the Commission defined sixteen climate zones to represent the diversity of California’s climate regions. 1516 Ninth Street Effective January 1, 2010 the Standards will require that a Cool Roof material meet an aged solar reflectance value (3 year testing) provided by the Cool Roof Rating Council (CRRC): Contact Us | Directions. Alternatively you can search for your zone by county through’s here. Title 24 Energy Standards. All roofing products must be certified and labeled according to the Cool Roof Rating Council (CRRC) to comply with the Standards. There are cool roof products sold in California that are Energy Star Certified but this does not automatically qualify the product as a CRRC certified product. Established in 1978 to reduce California’s energy consumption, Title 24 Energy Standards set an energy budget for buildings based on their climate zone. Here is an example of how to complete the calculation: [0.2 + 0.7 (initial solar reflectance – 0.2], [0.2 + 0.40] = 0.60 aged solar reflectance, California Votes to Require Solar PV for new homes by 2020, New Title-24 residential ventilation requirements, Santa Monica adopts Zero Net Energy Code for all new single family construction. The USDA plant hardiness map divides North America into 11 hardiness zones. Map of Title 24 Climate zones for the San Francisco Bay Area, including Marin, Sonoma & Napa. The state is divided into 16 different climate zones. Products being used to comply with the Building Energy Efficiency Standards (California Code of Regulations, title 24, part 1, chapter 10, and part 6) may not necessarily meet all requirements in Title 24, so advertising should not make broad statements about Title The California Energy Commission has divided the state into 16 climate zones, each with its own requirements. ft.  Then simply move to the right in the table until you see the Cool Roof requirements for your climate zone. Latitude: 33.95 N . Title 24 Requirements California Climate Zone 10 Reference City: Riverside . Sacramento, CA 95814. Climate zone boundaries have changed . 1. Then go down along the left hand column until you come to “Roofing Products”. There are 16 climate zones in the state. Call (888)828-9488 for a free consultation. Insulation with a thermal resistance of at least 0.85hr ft2 degree F/btu or at least 3/4 inch air-space is added to the roof deck over an attic, or, 7. Replacing NIR-absorbing (“conventional”) roofing with visually similar, NIR-reflecting (“cool”) roofing can significantly reduce building heat gain. Once you have these factors determined then you simply consult one of the most important tables in the new 2008 Title-24 Building Efficiency Standards, Table 151-D. There you will select your roofing slope type and roofing weight per sq. Additionally, roofing products used for meeting the Title 24, Part 6 requirements must be rated and labeled by the CRRC (see section 10-113 of Title 24, Part 6). Title 24 of the California Code of Regulations is composed of 12 parts. Ductwork leakage must be HERS verified and insulated with a value of R-8 or R-11, depending on your climate zone. The following Cool Roof ... New Requirements in the 2019 California Title 24 Building Energy Efficiency Standards for Retail Spaces Photo: Dialectic. We’ll use climate zone #8 for an example. California Climate Zone 8 Keywords: California Climate Zone 8, Basic Climate Conditions, Design Day Data, Climatic Design Priorities, Title 24 Requirements, Climate, Bioclimatic Chart, Temperature, Temperature, Relative Humidity, Extra-Terrestrial Radiation, Wind Speed, Prevailing Wind Direction Created Date: 11/9/2015 11:35:29 AM The California Energy Commission updates the Building Energy Efficiency Standards every three years. In climate zones, 10, 12, and 13, with 1 sq. With the old 2005 Title-24 energy code a residential cool roof was an optional energy efficiency measure, however on January 1, 2010, cool roofs are now required for most residential buildings in many of California’s 16 climate zones.
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