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2009 versus 2012 IECC Maryland Affordable Housing Coalition June 26th, 2012

2009 versus 2012 IECC Maryland Affordable Housing Coalition June 26th, 2012. 2009 versus 2012 IECC. Overview Reading the Code on Your Own Compliance Paths Low-rise Construction (Residential Code) Envelope, Air-sealing, Mechanical Mid-rise Construction (Commercial Code)

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2009 versus 2012 IECC Maryland Affordable Housing Coalition June 26th, 2012

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  1. 2009 versus 2012 IECC MarylandAffordable Housing Coalition June 26th, 2012

  2. 2009 versus 2012 IECC • Overview • Reading the Code on Your Own • Compliance Paths • Low-rise Construction (Residential Code) • Envelope, Air-sealing, Mechanical • Mid-rise Construction (Commercial Code) • Envelope, Air-sealing, Mechanical, Electrical, Extras

  3. 2009 versus 2012 IECC Some aspects of 2012 have been relaxed Opportunities exist to cost-effectively implement aspects of 2012 The 2012 is ~ 10-15% more efficient than 2009 The 2012 is ~ 30% more efficient than 2006

  4. 2009 versus 2012 IECC Reading the Code • Must read chapter by hierarchy • Understand each section by its context • Like finding the best “grape” of knowledge

  5. 2009 versus 2012 IECC Section 401: Intro Section 405 Section 402 Section 404 Section 403 402.1 402.4 402.2 402.3 402.4.1 Building Thermal Envelope: Air-sealing Reading the Code

  6. 2009 versus 2012 IECC Mandatory Residential Measures OR Prescriptive Pathway Performance Pathway Two Generic Compliance Methods to either code

  7. 2009 versus 2012 IECC Mandatory Residential Measures Prescriptive Pathway Performance Pathway Envelopes Prescriptive By Component Performance By Component UA- Alternative Two Generic Compliance Methods to either code

  8. 2009 versus 2012 IECC • Low-Rise, Wood-Framed Construction • Envelopes: Prescriptive by Measure

  9. 2009 versus 2012 IECC • Low-Rise, Wood-Framed Construction • Envelopes: Performance by Measure

  10. 2009 versus 2012 IECC If already using blown ceiling insulation and roof/ ceiling trusses are 24” O.C., then the project is nearly meeting this requirement. Only ½” extra needed. • Low-Rise, Wood-Framed Construction • Envelopes: Performance by Measure

  11. 2009 versus 2012 IECC • Low-Rise, Wood-Framed Construction • Envelopes: UA Alternative Compliance • Can exceed insulation on a component to trade-off for another • Example: 1000 Sqft House, over crawlspace

  12. 2009 versus 2012 IECC Mandatory Residential Measures OR Prescriptive Pathway Performance Pathway Two Generic Compliance Methods to either code

  13. 2009 versus 2012 IECC • Low-Rise, Wood-Framed Construction • Performance “Whole” building: Includes heating, cooling, and hot water LOADS. • HVAC efficiencies do not improve performance approach results • Variety of available energy models: commercial and public • RESCheck (free) • EnergyGauge • REMRate

  14. 2009 versus 2012 IECC Mandatory Residential Measures Air-sealing Prescriptive Pathway Performance Pathway Envelopes Mandatory Items Prescriptive By Component Performance By Component Testing UA- Alternative Air-sealing

  15. 2009 versus 2012 IECC • Locations for Air-Sealing: • Any two separate materials at boundary conditions have gaps that will leak air

  16. 2009 versus 2012 IECC Air-sealing differences

  17. 2009 versus 2012 IECC Negative Pressure Air-sealing testing methodology, standard home

  18. 2009 versus 2012 IECC Air-sealing testing methodology

  19. 2009 versus 2012 IECC Negative Pressure Air-sealing testing methodology, multifamily home

  20. 2009 versus 2012 IECC Air-sealing methods

  21. 2009 versus 2012 IECC Air-sealing methods

  22. 2009 versus 2012 IECC Mandatory Residential Measures Prescriptive Pathway Mechanical Air-sealing Performance Pathway Envelopes Piping Mandatory Items Prescriptive By Component Duct Leakage Performance By Component Testing Air-Handler Leakage UA- Alternative Mechanical Measures

  23. 2009 versus 2012 IECC Mechanical Measures

  24. 2009 versus 2012 IECC Mechanical Measures

  25. 2009 versus 2012 IECC Mechanical Measures, Duct Leakage

  26. 2009 versus 2012 IECC • Lighting • High Efficiency = CFLs or • 60 lumens per watt for lamps over 40 watts • 50 lumens per watt for lamps btwn 15-40 watts • 40 lumens per watt for lamps btwn<15 watts

  27. 2009 versus 2012 IECC Commercial Code (4 Stories and Taller)

  28. 2009 versus 2012 IECC Mandatory Commercial Measures Lights OR Prescriptive Additional Efficiency Air-sealing Performance Mechanical Code Organization

  29. 2009 versus 2012 IECC Mandatory Commercial Measures Lights Prescriptive Additional Efficiency Air-sealing Performance Mechanical Envelopes Prescriptive By Component Performance By Component UA- Alternative Envelopes

  30. 2009 versus 2012 IECC Envelopes

  31. 2009 versus 2012 IECC Mandatory Commercial Measures Lights Prescriptive Additional Efficiency Air-sealing Performance Mechanical Envelopes Prescriptive By Component Performance By Component UA- Alternative Air-sealing

  32. 2009 versus 2012 IECC Air-sealing

  33. 2009 versus 2012 IECC Envelope

  34. 2009 versus 2012 IECC Mandatory Commercial Measures Lights Prescriptive Additional Efficiency Air-sealing Performance Mechanical Min HVAC Performance Envelopes Commissioning Prescriptive By Component Performance By Component UA- Alternative Mechanical Systems

  35. 2009 versus 2012 IECC Mechanical Systems

  36. 2009 versus 2012 IECC Commissioning

  37. 2009 versus 2012 IECC Commissioning

  38. 2009 versus 2012 IECC Commissioning

  39. 2009 versus 2012 IECC Mandatory Commercial Measures Lights Prescriptive Additional Efficiency Air-sealing Performance Mechanical Min HVAC Performance Envelopes Commissioning Prescriptive By Component Performance By Component UA- Alternative Lighting

  40. 2009 versus 2012 IECC Lighting

  41. 2009 versus 2012 IECC • Lighting • “Bulbs” not Fixtures • Hole in 2009 allowed exterior lighting to be irrelevant for high-rise buildings

  42. 2009 versus 2012 IECC Mandatory Commercial Measures Lights Prescriptive Additional Efficiency Air-sealing Performance Mechanical Min HVAC Performance Envelopes Commissioning Prescriptive By Component Performance HVAC Performance By Component Performance Lighting UA- Alternative Renewables Lighting

  43. 2009 versus 2012 IECC OR Additional Efficiency – Performance HVAC

  44. 2009 versus 2012 IECC OR Additional Efficiency – Performance Lighting

  45. 2009 versus 2012 IECC Additional Efficiency – Performance Lighting 2kW system costs about $11,000 before rebates

  46. 2009 versus 2012 IECC Questions?

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