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Climate zones
Figures are available for simple performance upgrades in nine regional climate zones: Auckland, Hamilton, Tauranga, Napier, Wellington, Nelson, Christchurch, Dunedin and Invercargill.
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Comfortable temperatures
Up-Spec focuses on the most practical thermal efficiency opportunities for stand-alone volume-built homes, which will improve their year-round comfort and reduce additional heating and cooling needs.
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Energy efficiency
Energy efficiency improvements explored in Up-Spec include options for installing photovoltaics for solar energy generation, correct sizing of heat pumps for space heating and energy-efficient appliances and lighting.
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Water management
Improvements explored to reduce water use include water-efficient appliances and tapware, greywater recycling and rainwater tanks.
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Up-Spec tools
BRANZ has developed calculation tools to help with designing and specifying higher-performing homes.
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Photovoltaic (PV) generation calculator for solar energy
Use this calculator to determine the average yearly electricity generation capability of your photovoltaic (PV) system.
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Related resources
These BRANZ resources relate to improving the performance of New Zealand houses.
Updated: 20 September 2023