and the new 2013 Title 24 Energy Standards

Transcription

1 , and the new 2013 Title 24 Energy Standards Presented by Dave Intner, AIA and KavitaRodrigues, CEPE Southern California Edison October 1 st, 2014

2 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

3 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

4 2014 Program Redesign 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

5 2014 CAHP Incentive Structure 2014 CAHP SF 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

6 2014 CAHP Incentive Bonuses 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 Systems New Technologies

7 2014 CAHP Incentive Report Sample 2014 CAHP Incentive Report CBECC-Res or EnergyPro will generate the CAHP incentive report, which shows your CAHP score, incentive and energyuse data of the home At the moment the CAHP Score and Incentive Estimate Tool is available at: cahp-pge.com/process

8 2014 CAHP SF Examples

9 2014 CAHP MF Examples

10 Title 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

11 Title Residential Envelope

12 Title 24, Envelope Windows Mandatory Maximum Fenestration U-factor = 0.58 Double pane, Metal frame, Low-E U-factor SHGC 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

13 Title 24, Envelope Courtesy of Martyn Inc Insulation Mandatory Ceiling/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)

14 Title 24, Envelope Insulation Prescriptive Ceiling/Roofs R38 (zones 1, 11-16) R30 in zones 2-10 Walls U-factor = 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 Courtesy of Martyn Inc Vapor barrier required in unvented crawlspaces in all zones

15 Title 24, Envelope Coolroofs.org American Rooftile Coatings 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

16 Title 24, Envelope Envelope Opportunities Windows 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

17 Title 24, Envelope Envelope Opportunities Roofs Roof deck insulation Raised heel trusses Specify CRRC rated cool roofs Buildingscience.com

18 Title 24, Solar Zones Courtesy of Martyn Inc 2013 Residential Compliance Manual 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 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 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

19 Title Residential Mechanical

20 Title 24, 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 Courtesy of Martyn Inc HVAC - Prescriptive Prescriptive duct insulation = R-8 in climate zones 11, Refrigerant charge test in zones 2, 8-15 New Efficiencies for DX air conditioners will be implemented on Jan 1, 2015 Equipment < 65,000 Btuh will require 14 SEER Equipment 65,000 Btuh<240,000 Btuh= 11.7 EER

21 Title 24, Mechanical 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/sqftof floor area Illustration courtesy of Paul Perreault, BakedMedia

22 Title 24, Mechanical 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 Courtesy of Martyn Inc

23 Title 24, Mechanical 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 % Net Solar Fraction in zones Cannot install electric DHW unless No natural gas is available AND Provide 50% NSF solar system

24 Title 24, Envelope Mechanical Opportunities HVAC 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

25 Title 24, Envelope Mechanical Opportunities Water Heating High efficiency (Condensing) water heaters Heat Pump water heaters Combined Hydronic systems Insulate all pipes Compact distribution systems On demand recirculating systems

26 Title Residential Lighting

27 Title 24, Lighting Lighting All lighting fixture requirements are Mandatory Measures Standards only apply to permanently installed fixtures A medium screw base is treated as incandescent Conservation Law Foundation Kitchens 50% of total rated wattage must be high efficacy Bathrooms A minimum of one high efficacy luminaire shall be installed in each bathroom AND 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 lighting AND Must be controlled by a vacancy sensor

28 Title 24, Envelope 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