Net Zero Box
The Net Zero House in Alexandra, Central Otago was completed in late 2019. This is the second solar powered home designed for these Aonui Architecture clients, the first being off the grid but needing fossil fuelled supplementary heating in winter.
The challenge of a net zero energy home in Central Otago is primarily one of capitalising on the maximum amount of passive solar and photovoltaic harvesting to help maintain thermal comfort throughout the temperature range between 35°C in summer and -10°C in winter.
This is achieved by:
- high level of insulation (SIPS panel construction R6.0 and R7.0 EPS strandboard sandwich) and
- net positive electricity budget (generating more power than is consumed) over a typical 12-month period via north wall glazing and roof generation.
The 32° north facing roof covering the 100 sq.m 2-bedroom home is ideal for summer photovoltaic generation and losing only a few percent efficiency in winter by not being exactly normal to the midday sun.
The ever present and common risk of summer overheating in passive solar houses is avoided by strategically placed high level south wall windows that expedite warm air expulsion by stack ventilation.
As the owners gradually increase the solar array continuous monitoring is expected to confirm net zero energy consumption by autumn 2021.
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About the
Professional
Aonui Architecture is a New Zealand Institute of Architects registered practice with a principal who is a Registered Architect listed with the New Zealand Registered Architects Board (NZRAB). We were founded in 2003 by Richard Wright with the express purpose of providing architectural services that are focused on resilient design in general and low energy consumption, low carbon footprint building construction and smart building management systems in particular.
The practice now has a portfolio of completed sustainable design projects of all types throughout New Zealand and the Pacific and uses its accumulated data and experience to deliver increasingly efficient low-impact buildings for clients who have a shared commitment to smarter, warmer, drier, healthier accommodation being part of their future. We continue to work with the most enlightened and proactive consultants, manufacturers, suppliers and contractors to bring the goals of net zero energy consumption and carbon neutral building nearer to reality with every new completed project.
Our architecture seeks to capture the dreams of our clients, the spirit of their often enchanting sites and the joy of beautiful spaces in truly responsive buildings that will always be capable of nurturing and inspiring their occupants and owners.
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