New H1 Building Code

in relevance to embedded(underfloor) heating​

About H1 requirements for embedded(underfloor) heating​

I’m new…

  • The new H1 Code is refering to New Zealand Building Code Clause H1 - Energy efficienc, whichh was amended/updated in August 2022.

  • the measure of thermal resistance used in the building and construction industry. It indicates how well a material insulates and resists heat flow.

    Higher R-Value, the better insulation properties.

I want to know more…

Map of New Zealand climate zones

Map of New Zealand climate zones

Three methods for complying with the construction R-values

The Schedule Method is the most prescriptive. Compliance is gained by meeting the minimum requirements of the tables.

The Calculation Method compares the proposed building with the reference building. This method permits roof, wall, floor, window, door and skylight insulation combinations that differ from these tables, but the building must perform at least as well as the reference building. ​

The Modelling Method is a computer-generated version of the Calculation Method and provides the greatest scope for optimising insulation requirements so that would be my preferred option. ​

With Embedded Heating, up to 300m2

With Embedded Heating, Above 300m2

Slab Suppliers’ Responses

FIRTH

Website calculator: Thermal Calculator

MaxRaft

Website calculator: The R-value-Calculator

Designers’ Solutions

TBC

What does MBIE and Councils say?

TBC

*Updated in January 2024

The purpose of this page is to provide additional information and to help consumers or professionals to navigate the regulation changes. Not to serve as an authoritative source or final answer. The information presented has been consolidated from online public sources, cited accordingly, and through personal conversations. However, we cannot guarantee the accuracy or currentness of all the information provided. If you notice any inaccuracies, please contact us immediately.