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Optimum specification for NZ Houses

Explore the optimum house specifications for New Zealand, considering energy efficiency, cost, and different construction types. Analyzing data on energy use, life cycle analysis, orientation, and construction type, this study shows how higher-performance requirements can reduce energy use while maintaining cost-effectiveness.

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Optimum specification for NZ Houses

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  1. Optimum specification for NZ Houses Nalanie Mithraratne & Brenda Vale School of Architecture The University of Auckland

  2. World Primary Energy Useby region (1971 – 1998) [Source: IPCC (2001)]

  3. Life Cycle Analysis Model - User Interface

  4. NZS4218:1996 [Source: NZS 4218:1996] [Source: ECCA (1994)]

  5. Construction types • Light: timber framed construction. • Concrete: timber framed construction with concrete floor. • Light-High: timber framed construction with additional insulation and double glazing. • Concrete-High: construction with additional insulation and double glazing. • Superinsulated: timber framed construction with R 4.4m2.oC/W all around and double glazing.

  6. Orientation & LCE - Auckland

  7. Orientation & LCE- Wellington

  8. Orientation & LCE - Christchurch

  9. Construction type & LCE

  10. Construction type & LCE

  11. Energy prices & Life cycle cost [Source: Contact Energy (2004)]

  12. Initial and Life cycle cost

  13. LCC with 100% increase in energy

  14. Conclusions • Price of energy significantly impact the life cycle cost. • Use of higher performance requirements currently specified for colder region throughout NZ could reduce the energy use dramatically at a marginal increase in initial cost.

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