and the new 2013 Title 24 Energy Standards · Title 24, 2013-Lighting Lighting • All lighting...

,

and the new 2013 Title 24 Energy Standards

Presented by

Dave Intner, AIA and Kavita Rodrigues, CEPE | Southern California Edison | October 1st, 2014

Introduction

California Advanced Homes Program

CAHP is a statewide residential energy efficiency program available to both single family and multifamily projects.

The program encourages best practices in energy efficiency, green building and sustainability through:

• Financial Incentives

• Independent third party verification for quality control

• Energy design assistance

2014 Program Redesign

2014 CAHP Redesign

• Align CAHP with statewide 2020 Zero Net Energy Residential Goal

• Establish CAHP as a vehicle for ZNE market Transformation in California

• Include all energy end uses within a home’s envelope

• Create a program that can adapt to new technologies

Percent better than code includes only 25 – 70% of a home’s energy use

The CAHP Score

Derived from the CA HERS Design Rating

• Includes all energy end uses within the envelope including lighting, appliances & plug loads

• Calculated within the Title-24 energy modeling software

• Uses Time Dependent Valuation – TDV

2014 Program Redesign

2014 CAHP SF

2014 CAHP Incentive Structure

2014 CAHP MF – Low Rise

• $300 for program entry CAHP score of 84

• $100 for each point down to 75

• $200 for each point thereafter

• $150 for program entry CAHP score of 84

• $50 for each point down to 75

• $100 for each point thereafter

Single Family

Multi Family

CAHP points – New incentive bonuses

CAHP points reduce your CAHP score and increase your incentive

• 5 points – Future Code Preparation measures

• 3 points – DOE Zero Energy Ready Home

• 5 points – SF only - Low Energy Use bonus (100,000 kTDV/year)

• 5 points – SF only Ultra Low Energy Use bonus (60,000 kTDV/year

Additional points are under development including

• 100% high efficacy lighting

• EnergyStar Appliances Package standard

• Home Energy Management SystemsNew Technologies

2014 CAHP Incentive Bonuses

Sample 2014 CAHP Incentive Report

CBECC-Res or EnergyPro will generate the CAHP incentive report, which shows your CAHP score, incentive and energy-use data of the home

At the moment the CAHP Score and Incentive Estimate Tool is available at:

cahp-pge.com/process

2014 CAHP Incentive Report

2014 CAHP SF Examples

2014 CAHP MF Examples

Title 24 2013 Residential

Overview

� New Simulation Engine – CSE

� All prescriptive packages have been condensed to one – Package A

� PV may be used as a compliance option for zones 9-15 with a minimum 2kW system size

� If PV is used to show compliance the project cannot apply for the NSHP rebate


Envelope

Title 24, 2013- Envelope

Windows – Mandatory• Maximum Fenestration U-factor = 0.58

Windows – Prescriptive• Prescriptive U-factor = 0.32

(all climate zones)• Prescriptive SHGC = 0.25

(except zones 1, 3 &5)• Prescriptive maximum west facing area of 5%

(except zones 1,3,5 &6)

Site built fenestration can use Appendix NA6 “Alternate Default Fenestration Procedure to Calculate Thermal Performance”

Double pane, Metal frame, Low-E

U-factor 0.56-0.70SHGC 0.26-0.4

http://www.efficientwindows.org


Insulation – MandatoryCeiling/Roofs

• R-30 (Weighted average U- Factor<0.031)• Exception: Alterations = R19

Walls• Frame wall 2x4 = R13 (Weighted average

U- Factor <0.102)• Frame wall 2x6 = R19 (Weighted average

U- Factor <0.074)Raised Floors

• R19 (Weighted average U- Factor <0.037)

Courtesy of Martyn Dodd @EnergySoft Inc


Insulation – PrescriptiveCeiling/Roofs

• R38 (zones 1, 11-16)• R30 in zones 2-10

Walls• U-factor = 0.065

• R-15 in 2x4 wall cavity + R-4 rigid insulation over framing

OR• R-13 in 2x4 wall cavity + R-5 rigid

insulation over framing

Radiant Barriers are now a prescriptive requirement in Climate Zones 2-15

Vapor barriers required on walls in Zones 14 & 16

Vapor barrier required in unvented crawlspaces in all zones

www.builderonline.com



Cool Roofs – Prescriptive• Low-slope ≤2:12 (zones 13, 15)

• Reflectance ≥ 0.63• Emittance ≥ 0.75

OR• SRI ≥ 75

• Steep-slope >2:12 (zones 10-15)• Reflectance ≥ 0.20• Emittance ≥ 0.75

OR• SRI ≥ 16

Coolroofs.org

American Rooftile Coatings


Envelope OpportunitiesWindows• Non metal window frames • Thermally improved frames • High performance glazing• Effective placement and sizing of overhangs

and shading devices

Insulation• Advanced assemblies • Non framed assemblies or panelized systems

such as SIPs and ICFs.• HERS verification for insulation installation and

envelope air leakage.

Deltechomes.com

http://www.efficientwindows.org


Envelope OpportunitiesRoofs• Roof deck insulation• Raised heel trusses• Specify CRRC rated cool roofs

Buildingscience.com

Title 24, 2013- Solar Zones

Solar Zones - Single family• In subdivisions with 10 or more single residences• Minimum roof area of 250 square feet• 3+ stories and ≤ 2000 sqft, roof area required is

150 sqft

Solar zone:• Roof oriented between 110 degrees and 270 degrees, or flat roof• No roof obstructions• Designed for weight of solar panels• The area might be divided into sections of ≥ 80sqft, with no dimension < 5ft

Solar Zones - Multi family• Minimum 15% of roof area• Located on the roof or overhang of the building or

another structure located within 250 feet of the building or on covered parking installed with the building

2013 Residential Compliance Manual



Mechanical

Title 24, 2013- Mechanical

HVAC - Mandatory• Duct sealing required in all climate zones

Maximum duct leakage = 6%• Minimum duct insulation = R-6• Return ducts sized per tables

OR • HERS testing for fan power and airflow

HVAC - Prescriptive

New Efficiencies for DX air conditioners will be implemented on Jan 1, 2015Equipment < 65,000 Btuh will require 14 SEEREquipment ≥ 65,000 Btuh <240,000 Btuh = 11.7 EER

• Prescriptive duct insulation = R-8 in climate zones 11, 14-16

• Refrigerant charge test in zones 2, 8-15



Ventilation - Mandatory• Whole house IAQ fans require HERS testing

and verification• Continuous operation of HVAC fan is not

allowed as IAQ approach

Ventilation - Prescriptive• Prescriptive whole house fan required in zones

8-14• Must be listed in CEC appliance directory• Provides a minimum of 2 cfm/sqft of floor

area

Illustration courtesy of Paul Perreault, BakedMedia


Domestic Hot Water – Mandatory

• Minimum efficiencies & certification• All hot water pipes ≥ ¾” must be insulated• All piping in recirculation loops must be insulated• Gas or Propane water heaters serving individual

units must have• 120V outlet within 3ft• Category III or IV (or B) straight pipe vent• Condensate Drain• Gas supply sized to deliver at least 200,000

Btuh



Domestic Hot Water – Prescriptive• Demand control on recirculation loops• 8+ dwelling units require a minimum of two

recirculation loops• Systems serving multiple units must have a solar

water heating system with• 20% Net Solar Fraction in zones 1-9• 35% Net Solar Fraction in zones 10-16

• Cannot install electric DHW unless• No natural gas is available

AND• Provide 50% NSF solar system


Mechanical OpportunitiesHVAC• Start with a good envelope• Right size your equipment• EER is more important than SEER• Bring ducts out of unconditioned space• Avoid undersized return air paths• Ductless mini-split, heat recovery ventilation,

ground coupled heat pumps, evaporative condensers, combined hydronic systems


Mechanical OpportunitiesWater Heating• High efficiency (Condensing) water heaters• Heat Pump water heaters• Combined Hydronic systems• Insulate all pipes• Compact distribution systems• On demand recirculating systems


Lighting

Title 24, 2013- Lighting

Lighting• All lighting fixture requirements are Mandatory

Measures• Standards only apply to permanently installed

fixtures• A medium screw base is treated as incandescent

Kitchens• 50% of total rated wattage must be high efficacy

Bathrooms• A minimum of one high efficacy luminaire shall be

installed in each bathroomAND

• All other lighting installed shall be high efficacy or controlled by vacancy sensors

Garages, Laundry rooms and Utility rooms• All hard wired lighting must be high efficacy

lightingAND

• Must be controlled by a vacancy sensor

Conservation Law Foundation


Lighting Opportunities• Match technologies to applications• Use high efficacy lights for those light sources

that have the highest wattage for the most hours in the day

• Use daylighting strategies

and the new 2013 Title 24 Energy Standards · Title 24, 2013-Lighting Lighting • All lighting...

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