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Helping Massachusetts Municipalities Create a Greener Energy Future           Stretch Code Informational                  ...
Topics   IECC 2009 Overview   What is the Stretch Code?   Discussion and Q&A
Energy Codes in MA are changing   New base energy code in July 2010 (IECC 2009)       Roughly 10-15% more efficient than...
IECC and ASHRAE Codes      ICC & ASHRAE develop model building codes       and standards for the US.      ICC: publishes...
IECC 2009 and the MA 8th                Edition   IECC 2009 and the Stretch Appendi               nd             Appendix...
What’s Changed Since IECC 2006?    What s New     requirements include:     Building   envelope tightness     Duct test...
STRETCH ENERGY CODE   APPENDIX 115.AA
Why an Optional Stretch Code?   Growing desire to reduce costs, reduce                                costs    dependency...
What does the Stretch Code Apply                   to?   Residential                  Commercial                        ...
Residential New Construction
Performance Path    Performance Path is the only option      Uses Home Energy Rating System (HERS)      70 or less < 3,...
What is a HERS Rating?   Home Energy Rating System    (HERS) Index   Each home is tested, certified    and labeled by an...
What is the Thermal Bypass Checklist?
Stretch Code vs. IECC     Comparison   Typical Existing        Home   Std New Home     IECC 2006     IECC 2012     ~ HERS 70
Home Additions
Performance or Prescriptive Path                  Addition Only   Performance Path     70 or less < 3,000 sq ft.     65...
Home Renovations
Performance or Prescriptive Path     Performance Path is easier than for new      construction and additions       Easie...
Stretch Code and ENERGY STAR    The Stretch appendix almost puts the current     ENERGY STAR H    Homes program i  into c...
COMMERCIAL STRETCH CODE
Commercial ‘Stretch’ Appendix            Stretch   Addresses the construction of new commercial    buildings and addition...
ComplianceCodes and Training
Code Compliance & Inspections   Essentially the same as base code    E    ti ll th           b      d   Code Official ha...
Training on new energy codes   Covering both the IECC 2009 & Stretch code   Provided free to all Code Officials         ...
Stretch CodeCase Studies
Questions?
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
Needham stretch code overview 09-21-11
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Needham stretch code overview 09-21-11

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Presentation 9/21/11 by Greg Krantz to Green Needham on the Stretch Energy Code.

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Transcript of "Needham stretch code overview 09-21-11"

  1. 1. Helping Massachusetts Municipalities Create a Greener Energy Future Stretch Code Informational Session Sept. 21, 2011 Greg Krantz ICF International
  2. 2. Topics IECC 2009 Overview What is the Stretch Code? Discussion and Q&A
  3. 3. Energy Codes in MA are changing New base energy code in July 2010 (IECC 2009)  Roughly 10-15% more efficient than IECC 2006 10-  Next I-Code 1/1/2013-Designed to be 30% better I- 1/1/2013-  New phase of outcome-based Energy Codes outcome- Stretch Code appendix 115.AA pp  Approx 15-20% more energy 15- efficient than the base code (IECC 2009/AHRAE 90.1 2007) Commercial bldgs. ASHRAE 90.1-2007 remains g 90.1-ASHRAE 90.1 = Energy Standard for Buildings Except Low‐Rise Residential BuildingsIECC = International Energy Conservation Code – of International Codes Council (ICC)
  4. 4. IECC and ASHRAE Codes  ICC & ASHRAE develop model building codes and standards for the US.  ICC: publishes IECC energy code  3 year cycle IECC 2006, IECC 2009 2006  ASHRAE: publishes 90.1 standard  3 year cycle 90.1-2007, 90.1-2010 90.1- 90.1-IECC = International Energy Conservation Code – of International Codes Council (ICC)ASHRAE = American Society of Heating, Refrigerating and Air-Conditioning Engineers
  5. 5. IECC 2009 and the MA 8th Edition IECC 2009 and the Stretch Appendi nd Appendix 115.AA Codes address energy only MA 8th Edition will address all codes (structural, plumbing, etc.) (structural plumbing etc )
  6. 6. What’s Changed Since IECC 2006? What s New requirements include:  Building envelope tightness  Duct testing  Lighting equipment g g q p No moisture control requirements (framed walls, walls floors and ceilings)
  7. 7. STRETCH ENERGY CODE APPENDIX 115.AA
  8. 8. Why an Optional Stretch Code? Growing desire to reduce costs, reduce costs dependency on imported fuels, and address climate change Several towns and cities asked for the ability to adopt stronger building codes BBRS developed one alternative code that is consistent across the state i h
  9. 9. What does the Stretch Code Apply to? Residential  Commercial (5,000- (5,000-100,000 sq/ft)  New Construction  New Construction  Additions  Additions  Home Renovations Historic Home Exemption  Renovations Exempt
  10. 10. Residential New Construction
  11. 11. Performance Path  Performance Path is the only option  Uses Home Energy Rating System (HERS)  70 or less < 3,000 sq ft.  65 or less > 3,000 sq ft.  Requires a certified HERS rater q  Review building plans  Check insulation installation  Thermal bypass Checklist  Blower-door and duct testing Blower-Image source: www.lexingtoninfrared.com/hers-ratings.php
  12. 12. What is a HERS Rating? Home Energy Rating System (HERS) Index Each home is tested, certified and labeled by an independent y p HERS Rating Company  Must follow Residential Energy Services Network (RESNET) testing procedures  A HERS Rater uses software to model the h d l h home’s energy ’ performance based on plan analysis and on-site testing to calculate a on- HERS I d (C b used i Index. (Can be d instead d of ResCheck)
  13. 13. What is the Thermal Bypass Checklist?
  14. 14. Stretch Code vs. IECC Comparison Typical Existing Home Std New Home IECC 2006 IECC 2012 ~ HERS 70
  15. 15. Home Additions
  16. 16. Performance or Prescriptive Path Addition Only Performance Path  70 or less < 3,000 sq ft.  65 or less > 3,000 sq ft. Prescriptive Path P i i P h  ENERGY STAR Windows (U=.30)  Duct leakage under 4 cfm per 100 sq ft  Builder Verified Thermal Bypass Checklist
  17. 17. Home Renovations
  18. 18. Performance or Prescriptive Path  Performance Path is easier than for new construction and additions  Easier HERS index requirement (mostly relevant for gut- gut-renovations)  85 or less < 2,000 sq ft.  80 or less > 2,000 sq ft.  Prescriptive Path P i ti P th  Same as additions  Requirement for insulating empty cavities if wall sheathing is exposedImage source: http://www.wilkinsonbuild.co.uk/Portals/5/Renovation/renovation2.jpg
  19. 19. Stretch Code and ENERGY STAR  The Stretch appendix almost puts the current ENERGY STAR H Homes program i into code d  ENERGY STAR is a proven cost-effective cost- program  Approx 30% in 2010 of new homes in MA  Builder incentives/rebates  Incentives up to $8000,  Rebates on appliances, heating and cooling, lighting, etc.  Builder training and materials  Subsidized HERS raters  Third party verification
  20. 20. COMMERCIAL STRETCH CODE
  21. 21. Commercial ‘Stretch’ Appendix Stretch Addresses the construction of new commercial buildings and additions over 5,000 ft2 Two Options (depending on size) • Performance option - 20% below Code • Prescriptive option for most building types 5,000 - 100,000 ft2
  22. 22. ComplianceCodes and Training
  23. 23. Code Compliance & Inspections Essentially the same as base code E ti ll th b d Code Official has the same authority  Same building inspections  Approves building documents, Energy Star and HERS rating or ASHRAE modeling as g documentation of energy compliance
  24. 24. Training on new energy codes Covering both the IECC 2009 & Stretch code Provided free to all Code Officials d d d  Includes IECC code book and Stretch appendix Provided at cost to building professionals Register online: www.cetonline.org/Events/events.php  Separate Commercial and Residential sessions Energy star homes training available for free: www.energystarhomes.com/ Utilities offer commercial ‘Core Performance’ energy training i i
  25. 25. Stretch CodeCase Studies
  26. 26. Questions?
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