(2016 Changes presented in CBIA-CEC Building Standards Forum, April 4, 2014: http://www.energy.ca.gov/title24/2016standards/prerulemaking/documents/2014-04-04_forum/overview/Overview%20CEC%20Shirakh.pdf)
2016 Standards Approach Is A Departure From The Past
1. Not focused on a specific measure(s)
2. Define ZNE goals and energy use index (EUI) target
3. Provide the builders a range of options to meet the ZNE goals
4. Builders and manufacturers can come up with additional solutions with the same efficiency potentials for meeting the ZNE goals
5. Different builders based on their preferences choose unique prescriptive solutions or compliance options that work for them
6. Free market will settle on the most promising solutions
7. Create “buildable” prescriptive packages that builders can use to meet ZNE goals without using performance path – possible relaxation of west-facing glass limit
The builder may choose one option described in A or B below:
A. High Performance Attics (HPA) with following features:
i. Roof deck insulation equivalent to R-6 continuous insulation (CI) with RB, either above or below deck. Insulation choices may include CI, spray foam, batt, or blown-in, and SIP panels
ii. Highly reflective roofs or combining reflective roofs with roof deck insulation
iii. Or other solutions suggested by the industry
B. Or, one of the following prescriptive alternatives to HPA:
i. Ducts in conditioned space (DCS)
ii. Sealed attics
iii. Ductless systems
iv. Or other solutions suggested by the industry
Or choose either 1 or 2 from compliance options below as an alternative to HPA or DCS:
1. Photovoltaic tradeoff
2. Advanced Decentralized Whole House Fans
Also Create a Super High Efficiency Windows Compliance Credit
High Performance Walls – U-Factor equivalent to R23 + R6 CI using one of the following strategies:
1. 2x6 @ 24” OC with CI
2. Staggered studs with batt insulation or spray foam
3. Structurally Insulated Panels (SIPs)
4. Or other solutions suggested by the industry
Tankless Water Heaters
Basis of Prescriptive Package – Energy Factor of 0.82
High Efficacy Lighting
1. All high efficacy lighting in kitchens and support areas
2. All recessed downlights high efficacy
3. Allow luminaires with medium base socket as high efficacy if the socket is populated with a high quality LED lamp at the time of inspection.
The old cliché: A nation that can put a man on the moon should be able to figure out how to reduce the hot attic temperatures in our cooling climate zones