New verification method for HVAC

This regulatory framework is part of MBIE’s Building Code update and supports their Building for Climate Change programme.

On the 29 November 2021, the Ministry of Business, Innovation and Employment (MBIE) released energy efficiency changes to the acceptable solutions and verification methods. Six new climate zones are also being established to reflect the specific weather experienced in different parts of New Zealand. Each zone has specific minimum insulation requirements, meaning homes will need to be designed and built for the climate they’re built in.

A new verification method for the energy efficiency of HVAC systems, H1/VM3, has been introduced to help demonstrate compliance with the Building Code. This will allow building owners to better monitor the performance of their HVAC system and have confidence that the system is using energy optimally.

The project to finalise the verification method was informed by a panel of four experienced HVAC experts, convened by Engineering New Zealand, and working with MBIE’s Building System Performance (BSP) branch - in addition to MBIE’s public consultation. The panel facilitated and advised BSP in the development and review of its working document. Supplementing their knowledge of national and international regulatory frameworks, the panel of specialist engineers offered detailed technical input about the New Zealand situation until a mature and final document was produced.

Since 2018, Engineering New Zealand has grown a successful partnership with BSP, with projects commissioned through its Sector Programmes team. Sector Programmes sources technical advice directly from the engineering community to help provide additional technical rigour to MBIE’s regulatory products.

Chief Executive of Engineering New Zealand Richard Templer says, “This partnership promotes collaboration and strengthens the relationship between the regulator and our profession. We do this to deliver a better building system for all New Zealanders.”