H1 & BPIR Compliance

H1 Compliance Overview

The minimum thermal performance (keeping a home warm) for housing for building consents has changed. Along with new climate zones this will see a jump in the thermal performance for windows in new homes and will vary depending on the climate zone of the build.

The three different methods of H1 compliance are as below:

1. The Schedule Method (table) - find in MBIE H1 Energy Efficiency AS H1/AS1

2. The Calculation Method (which can be supplied by your window fabricator)

3. The Modelling Method (requires specialist software)

Selecting your double and triple glazing

When selecting the right double or triple glazing for your home one of the main considerations is around keeping your home warm in winter.

The minimum thermal performance (keeping a home warm) for housing is changing for building consents lodged after the 3rd Nov 2022.  Along with new climate zones this will see a jump in the thermal performance for windows in new homes and will vary depending on the climate zone of the build.

To use the Window and Glass Association NZ reference guide click here and simply add your Territorial Authority and consent date.

The MBIE map below illustrates the Climate Zones and Territorial Authority Boundaries.