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NZBC-H1_Overview-Oct07

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Rob Campion of APL gives an overview of the NZBC Clause H1 - Energy Efficiency

Rob Campion of APL gives an overview of the NZBC Clause H1 - Energy Efficiency

Published in Economy & Finance , Business
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Transcript

  • 1. NZBC Clause H1 Overview Robert Campion Architectural Profiles Ltd (APL) October 2007
  • 2. energy efficiency
    • “ Biggest energy efficiency steps
    • in 30 years”
  • 3. nzbc clause H1
  • 4. energy efficiency
    • The changes;
      • tougher insulation requirements
      • domestic hot water systems
      • commercial lighting
      • commercial HVAC systems
  • 5. heat loss
    • un-insulated house
    windows =12% walls =24% roof = 42% floor =10%
  • 6. nzbc clause H1
    • Generally based on NZS 4218:2004
    • but…
    • with increased R-values
    • Tables shown within H1 replace those used in NZS 4218
  • 7. climate zones Zone1 Auckland, North Zone 2 Balance North Island, except Central Plateau Zone 3 South Island & Central Plateau
  • 8. new R values
  • 9. new R values
    • non-solid construction
    roof ; z1 = R2.9 z2 = R2.9 z3 = R3.3 floor ; z1 = R1.3 z2 = R1.3 z3 = R1.3 window ; z1 = 0.26 z2 = R0.26 z3 = R0.26 wall ; z1 = R1.9 z2 = R1.9 z3 = R2.0
  • 10. nzbc clause H1
    • 3 Methods of Compliance…
    • Schedule
    • Used when <30% of wall area is glazed
    • Calculation
    • Used when <50% of wall area is glazed
    • Modeling
    • Used when >50% of wall area is glazed
    • and complex design
  • 11. schedule method
  • 12. floor
    • un-insulated house
    floor = 10% z1 = R1.3 z2 = R1.3 z3 = R1.3
  • 13. floor insulated timber floor draped foil 100mm sag carpet = R1.5 no carpet = R1.1 Pic Courtesy of BRANZ - BRANZ House Insulation Guide
  • 14. floor concrete floor slab/perim. ratio = 1.5 insulated / no TB = R1.3 insulated with TB = R1.5 Pic Courtesy of BRANZ - Build Magazine
  • 15. roof
    • un-insulated house
    roof = 42% z1 = R2.9 z2 = R2.9 z3 = R3.3
  • 16. roof concrete tile - truss blanket type timber battens z2 requirement = R2.9 insulation must meet R2.65 Pic Courtesy of BRANZ - BRANZ House Insulation Guide
  • 17. walls
    • un-insulated house
    walls = 24% z1 = R1.9 z2 = R1.9 z3 = R2.0
  • 18. walls brick veneer blanket type 100 x 50 studs @ 600 z2 requirement = R1.9 insulation must meet R2.05 Pic Courtesy of BRANZ - BRANZ House Insulation Guide
  • 19. walls stucco on cavity blanket type 100 x 50 studs @ 600 z2 requirement = R1.9 insulation must meet R2.15 Pic Courtesy of BRANZ - BRANZ House Insulation Guide
  • 20. walls stucco on cavity blanket type 100 x 50 studs @ 400 z2 requirement = R1.9 insulation must meet R2.3 Pic Courtesy of BRANZ - BRANZ House Insulation Guide
  • 21. windows
    • un-insulated house
    windows =12% z1 = R0.26 z2 = R0.26 z3 = R0.26
  • 22. schedule method
  • 23. wers table
  • 24. calculation method
  • 25. calculation method
    • Zone 2, 34.7% (45m 2 ) Glazed Area
    • HL Ref = 38.9m2/0.26 + 6.1/0.31
    • = 149.6 + 19.7
    • = 169.3 m 2 o C/W
  • 26. calculation method
    • If window target = 169.3 …
    • Aluminium frame / single clear glass
    • R (Total) = 0.15
    • 45m 2 @ 0.15 = 300
    • ( 130.7 must be made up elsewhere)
    • equates to doubling all other values
  • 27. calculation method
    • If window target = 169.3 …
    • Aluminium frame / clear IGU
    • R (Total) = 0.26
    • 45m 2 @ 0.26 = 173.1
    • ( 3.8 must be made up elsewhere)
  • 28. calculation method
    • If window target = 169.3 …
    • Thermally broken frame/clear IGU
    • R (Total) = 0.31
    • 45m 2 @ 0.31 = 145.2
    • ( 24.1 can be reduced elsewhere)
  • 29. modeling method
    • Modeling Method
    • Designer contacts a specialist with the appropriate software to calculate the building requirements
  • 30. modeling method
  • 31. status Zone 3 31 October 2007 Zone 2 30 June 2008 Zone 1 30 Sept 2008
  • 32. thank you Refer to the Third Edition of NZBC Clause H1 – Energy Efficiency in conjunction with NZS 4218:2004 – Energy Efficiency, Small Building Envelope, for a full understanding of the changes.