Скачать или смотреть H1 VM1 Energy Efficiency: Free Masterclass

Join Darren from Better Building for a comprehensive walkthrough of the major changes to New Zealand's H1 Verification Method 1 (VM1) for residential building energy compliance. This 90-minute session covers everything you need to know about the 2025 updates and includes practical modeling demonstrations.

The first 45 minutes focus on the ten major changes to the VM1 code. These include updates to climate data requirements and how to access the new climate files, the standardization of solar heat gain coefficient to 0.55 (and why this matters for overheating), and critical changes to ventilation modeling where window opening temperatures have shifted from 24-25°C to 22-25°C. Darren also covers the significant reduction in plug loads from 24.5 W/m² down to 13.5 W/m², updated thermal envelope requirements including the new R1.6 default for walls, clarifications on internal dimensions for measuring thermal envelope floor area, and updated approaches for modeling multi-unit dwellings. The removal of the schedule method and modifications to the NZS 4214 standard are also discussed.

The second 45 minutes features practical modeling examples using the Better Building platform. Darren demonstrates live models comparing Auckland and Queenstown climates, showing how the same building performs vastly differently in heating-dominated versus more temperate zones. The session includes detailed comparisons between the calculation method and modeling method, revealing why the calculation method may show compliance while missing critical overheating risks that only the modeling method can identify. You'll see real-world design optimization strategies, learn how to interpret heat gains and losses through walls, floors, roofs, and glazing, and understand why detailed thermal modeling is essential for actual occupant comfort beyond just meeting code minimums.

This session is ideal for architects, building designers, engineers, building consent professionals, and anyone working with residential building compliance in New Zealand. Whether you're familiar with VM1 or just getting started, you'll gain practical insights into navigating the 2025 changes and delivering better performing buildings.