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Building Code Update - Energy Efficiency (H1)

Energy Efficiency (H1) Requirements

The Ministry of Business, Innovation and Employment (MBIE) has updated the Energy Efficiency (H1) requirements for insulating new homes and commercial buildings in the New Zealand Building code. The purpose is to reduce energy needed to heat new buildings by up to 40% and help make them warmer, drier & healthier, with less impact on the environment.

NEW CLIMATE ZONES


With a focus on energy efficiency, these changes are explained first by introducing New Climate Zones. This will allow the insulation requirements to better reflect the different temperatures experienced in each zone. MBIE has expanded the number of climate zones used in the insulation requirements to further divide into six.




ENERGY EFFICIENCY FOR ALL HOUSING AND SMALL BUILDINGS (UNDER 300m2)


MBIE has made changes to roof, window, wall and underfloor insulation.

The Building Code provides 3 methods for compliance:

1) The Schedule Method – Meet the minimum R-values provided

2) The Calculation Method – Meet the whole building Heat Loss parameter by calculating overall heat loss from all building envelope elements and allows trading off between elements so you can use higher R-values for some elements than the table shown and lower R-values for others

3) The Modelling Method – a calculation of the energy demand for the whole building using whole building calculation software

The new minimum thermal resistance values as noted in the schedule method, is summarised in table below:



ENERGY EFFICIENCY FOR LARGE BUILDINGS (OVER 300m2) EXCLUDING INDUSTRIAL


MBIE has made changes to roof, window, wall and underfloor insulation requirements and issuing the new H1/AS2 and H1/VM2 for large buildings. This aims to reduce the energy needed for heating and cooling of 23% on average across new large buildings over previous minimum status quo requirements.

The new minimum thermal resistance values as noted in the schedule method, is summarised in table below:


WHEN ARE THE CHANGES HAPPENING?


The new requirements were published 29th November 2021 with a transition period of one year when the changes become mandatory on 3rd November 2022.

The previous Acceptable Solution H1/AS1 Fourth Edition Amendment 4, can be used to show compliance until 2nd November 2022 and can be used for building consent applications submitted before 3rd November 2022.


START BUILDING NOW AT NEW ENERGY EFFICIENCY STANDARDS


For those who are currently building a new house it is possible to meet the new higher insulation requirements now, prior to the new rules coming into effect in November. It makes sense to future proof your build knowing what changes are coming.

At Knauf Insulation we have a range of products and solutions which can be mixed-and- matched to allow homeowners and builders to increase their energy efficiency levels.


AT ECO INSULATION


We are committed to supporting the build of healthier, higher performing homes in New Zealand alongside MBIE’s improved construction strategies. Using our global knowledge and local capabilities, our technical experts will bring innovative solutions best suited for the New Zealand Building Industry as we transition into the new Building Code requirements.




To keep up to date on the changes and to be amongst the first to hear about new products and solutions we'll be launching to help you meet the new requirements please register your interest below:


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