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Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m²

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Abbreviation
H1/VM2 (Second edition)
Version
Second edition
Valid from
27/11/2025
Information provider
Ministry of Business, Innovation and Employment,
Information type
Verification Method,
Format
PDF,
Cites
This resource cites 12 documents (show Citations)
Description

The Verification Method H1/VM2 provides a means of compliance with Building Code Clause H1 Energy Efficiency.

The Verification Method H1/VM2 applies to communal residential, communal non-residential (assembly care only) and commercial buildings with a floor area of occupied space greater than 300 m².

For all housing, and buildings other than housing with an occupied space less than 300 m², refer to the Acceptable Solution H1/AS1 or Verification Method H1/VM1 as a means to demonstrate compliance or use an alternative means demonstrate compliance.

Scope

This verification method does not apply to buildings with foil insulation.

Previous versions:
H1/VM2 (First edition, Amd 1) (First edition, Amendment 1)
H1/VM2 (First edition) (First edition, unamended)
H1/VM1 (Amd 4) (Fourth edition, Amendment 4)
H1/VM1 (Fourth edition, amendment 3)
H1/VM1 (Third Edition, Amendment 2)
H1/VM1 (Third Edition (unamended))
For assistance with locating previous versions, please contact the information provider.
Notes/comments

The main changes from the first edition amendment 1 are:

  • The requirements of the modelling method have been clarified and updated. This includes changes to requirements relating to climate data used for the modelling, and changes to modelling assumptions for the solar heat gain coefficient of glazing in the reference building model, and for internal gains from lighting. The previous requirement to model HVAC systems has been removed. A new requirement has been added for deviations from default modelling assumptions to be documented and justified.
  • For mixed-use buildings, the building may now be treated as having either a single thermal envelope, or multiple thermal envelopes, when demonstrating compliance using the modelling method.
  • The citation of NZS 4214 has been modified to enhance clarity of requirements for determining the thermal resistance of building elements containing thermal bridges.
  • The method for determining the thermal resistance of framed walls has been revised to better address typical levels of thermal bridging caused by wall framing members. As a consequence, the wall R-value in the reference building has also been reduced.
  • The application of minimum construction R-values of heated ceilings, heated walls and heated floors has been clarified, and these minimum construction R-values no longer apply where heated ceilings, heated walls or heated floors are installed solely in rooms that contain a shower, bath or toilet.
  • The method for determining the areas of roofs, walls and floors now requires the overall internal dimensions to be used.
  • References have been revised to reflect the documents cited in this verification method in Appendix A.
  • Definitions have been revised to reflect the terms used in this verification method in Appendix B.
  • The verification method now refers to the Building Product Specifications for determining the thermal resistance of insulation materials. As a consequence, reference to AS/NZS 4859.1 has been removed from the verification method with the applicable specifications located within  the Building Product Specifications.
View on Information Provider website Download this resource (PDF, 973KB)
For assistance with locating previous versions, please contact the information provider.

The main changes from the first edition amendment 1 are:

  • The requirements of the modelling method have been clarified and updated. This includes changes to requirements relating to climate data used for the modelling, and changes to modelling assumptions for the solar heat gain coefficient of glazing in the reference building model, and for internal gains from lighting. The previous requirement to model HVAC systems has been removed. A new requirement has been added for deviations from default modelling assumptions to be documented and justified.
  • For mixed-use buildings, the building may now be treated as having either a single thermal envelope, or multiple thermal envelopes, when demonstrating compliance using the modelling method.
  • The citation of NZS 4214 has been modified to enhance clarity of requirements for determining the thermal resistance of building elements containing thermal bridges.
  • The method for determining the thermal resistance of framed walls has been revised to better address typical levels of thermal bridging caused by wall framing members. As a consequence, the wall R-value in the reference building has also been reduced.
  • The application of minimum construction R-values of heated ceilings, heated walls and heated floors has been clarified, and these minimum construction R-values no longer apply where heated ceilings, heated walls or heated floors are installed solely in rooms that contain a shower, bath or toilet.
  • The method for determining the areas of roofs, walls and floors now requires the overall internal dimensions to be used.
  • References have been revised to reflect the documents cited in this verification method in Appendix A.
  • Definitions have been revised to reflect the terms used in this verification method in Appendix B.
  • The verification method now refers to the Building Product Specifications for determining the thermal resistance of insulation materials. As a consequence, reference to AS/NZS 4859.1 has been removed from the verification method with the applicable specifications located within  the Building Product Specifications.
This resource is not cited by any other resources.

Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m²

This document is not CITED BY any other resources:

Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m²

Description

The Verification Method H1/VM2 provides a means of compliance with Building Code Clause H1 Energy Efficiency.

The Verification Method H1/VM2 applies to communal residential, communal non-residential (assembly care only) and commercial buildings with a floor area of occupied space greater than 300 m².

For all housing, and buildings other than housing with an occupied space less than 300 m², refer to the Acceptable Solution H1/AS1 or Verification Method H1/VM1 as a means to demonstrate compliance or use an alternative means demonstrate compliance.

View on Information Provider website Download this resource (PDF, 973KB)
Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m²
Description

The Verification Method H1/VM2 provides a means of compliance with Building Code Clause H1 Energy Efficiency.

The Verification Method H1/VM2 applies to communal residential, communal non-residential (assembly care only) and commercial buildings with a floor area of occupied space greater than 300 m².

For all housing, and buildings other than housing with an occupied space less than 300 m², refer to the Acceptable Solution H1/AS1 or Verification Method H1/VM1 as a means to demonstrate compliance or use an alternative means demonstrate compliance.

View on Information Provider website Download this resource (PDF, 973KB)
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Verification Method H1/VM2: Energy efficiency for buildings greater than 300 m²

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