High-efficiency Water Heater High-Efficiency Water Heater Ready Page ii 2013 California Building Energy Efficiency Standards October 2011 List of Figures Figure 1

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  • CODES AND STANDARDS ENHANCEMENT INITIATIVE (CASE)

    High-efficiency Water Heater Ready 2013 California Building Energy Efficiency Standards California Utilities Statewide Codes and Standards Team October 2011

    This report was prepared by the California Statewide Utility Codes and Standards Program and funded by the California utility customers under the auspices of the California Public Utilities Commission.

    Copyright 2011 Pacific Gas and Electric Company, Southern California Edison, SoCalGas, SDG&E.

    All rights reserved, except that this document may be used, copied, and distributed without modification.

    Neither PG&E, SCE, SoCalGas, SDG&E, nor any of its employees makes any warranty, express of implied; or assumes any legal liability or responsibility for the accuracy, completeness or usefulness of any data, information, method, product, policy or process disclosed in this document; or represents that its use will not infringe any privately-owned rights including, but not limited to, patents, trademarks or copyrights

  • Residential High-Efficiency Water Heater Ready Page i

    2013 California Building Energy Efficiency Standards October 2011

    Table of Contents

    Codes and Standards Enhancement Initiative (CASE) ...................................................... 11. Overview ....................................................................................................................... 12. Methodology................................................................................................................. 8

    2.1 Data Collection ...........................................................................................................................82.2 Cost Analysis ..............................................................................................................................92.3 Savings Analysis ........................................................................................................................92.4 Lifecycle Cost (LCC) Analysis ..................................................................................................9

    2.4.1 Cost Effectiveness of High-Efficiency Water Heaters ........................................................92.4.2 Cost Savings Analysis........................................................................................................10

    2.5 Statewide Energy Savings ........................................................................................................112.6 Stakeholder Meeting Process ....................................................................................................11

    3. Analysis and Results ................................................................................................. 123.1 Data Collection .........................................................................................................................12

    3.1.1 Federal Residential Water Heater Standards .....................................................................123.1.2 EPA Energy Star Programs for Residential Water Heaters ...............................................143.1.3 Ultra-low NOX Water Heaters ...........................................................................................143.1.4 Market Penetration and Future Trend ................................................................................153.1.5 Water Heater Installation ...................................................................................................17

    3.2 Cost Analysis ............................................................................................................................193.3 Energy Savings Analysis ..........................................................................................................21

    3.3.1 High-efficiency Water Heater ............................................................................................213.3.2 Water Heater Blanket .........................................................................................................22

    3.4 Lifecycle Cost (LCC) Analysis ................................................................................................253.4.1 Cost Effectiveness of High-efficiency Water Heaters .......................................................253.4.2 Cost Savings Analysis........................................................................................................283.4.3 LCC of Water Heater Blanket ............................................................................................29

    3.5 Statewide Energy Savings ........................................................................................................304. Recommended Language for the Standards Document, ACM Manuals, and the Reference Appendices ....................................................................................................... 325. Bibliography and Other Research ............................................................................ 336. Appendices ................................................................................................................ 34

    6.1 California Single-family Home Layout ....................................................................................346.2 Code Language Recommendations Provided in the pre-Rulemaking Workshop ....................436.3 Residential Construction Forecast Details ................................................................................43

    6.3.1 Summary ............................................................................................................................436.3.2 Additional Details ..............................................................................................................446.3.3 Citation ...............................................................................................................................45

    6.4 Environmental Impact Analysis ...............................................................................................45

  • Residential High-Efficiency Water Heater Ready Page ii

    2013 California Building Energy Efficiency Standards October 2011

    List of Figures

    Figure 1. DOE 2015 Residential Water Heater Efficiency Standards .................................................. 12Figure 2. DOE Residential Gas Water Heater Test Standard Level ..................................................... 13Figure 3. EPA Energy Star Program Specifications for Residential Water Heaters ............................ 14Figure 4. California AQMDs with Low NOx Regulations ................................................................... 15Figure 5. DOE Projection of Water Heater Market Share in 2015 (DOE Rulemaking Supporting Data)

    ........................................................................................................................................................ 16Figure 6. National Fuel Gas Code Gas Appliance Category ................................................................ 18Figure 7. Water Heater Costs ................................................................................................................ 20Figure 8. Installation Cost Items ........................................................................................................... 21Figure 9. Annual Water Heater Energy Savings (Therm/building) ...................................................... 23Figure 10. Annual TDV Energy Savings (kBtu/building) .................................................................... 23Figure 11. PV of Water Heater Energy Savings ................................................................................... 24Figure 12. New Construction Water Heater Installation Assumptions................................................. 26Figure 13. LCC of Water Heater Options (New Construction) ............................................................ 27Figure 14. High-efficiency Ready Incremental Cost Comparison ........................................................ 28Figure 15. Water Heater Blanket Energy Savings and LCC ................................................................ 30Figure 16. Statewide Energy Savings Estimate .................................................................................... 31Figure 17. Summary of Typical Water Heater Locations and Vent Pipe Length ................................. 34Figure 18. Floor Plan 1367 sqft, One Story ....................................................................................... 35Figure 19. Floor Plan 2010 sqft, One Story ....................................................................................... 36Figure 20. Floor Plan 3080 sqft, One Story ....................................................................................... 37Figure 21. Floor Plan 1430 sqft, Two Story ...................................................................................... 38Figure 22. Floor Plan 2811 sqft, Two Story ...................................................................................... 40Figure 23. Floor Plan 4402 sqft, Two Story ...................................................................................... 42Figure 24. Residential construction forecast for 2014 .......................................................................... 44Figure 25. Material Increase for HE Water Heater Ready Measures ................................................... 46

  • Residential High-Efficiency Water Heater Ready Page 1

    2013 California Building Energy Efficiency Standards October 2011

    1. Overview a. Measure Title

    Residential Gas High-efficiency (HE) Water Heater Ready

  • Residential High-Efficiency Water Heater Ready Page 2

    2013 Cal