Sustainable architecture can make a significant impact on our collective carbon footprint.

While it’s possible to practice water conservation in any home, it’s much easier if you’ve thought about efficiency in the design and construction stages.

A new concept in architecture called Wai House, designed by Hanadi Al-Ganadi, understands how vital water efficiency is for the future of home design.

Wai means water in Maori and that is at the heart of this modern home. It is designed to collect and store rainwater for use, with systems in place that funnel it to the kitchen, bathroom, and outdoor greenery.

It was nominated for a Green Concept Award in 2021, which recognises 'visionary concepts' and innovative designs that use sustainable materials, products and services.

The Award is aimed at students, young designers, researchers, start-ups and companies who want to showcase, further develop or market their concepts in order to change society and the economy.

While Wai House may not be available to buy, there are plenty of ways to make your house more water efficient.

The technology to increase water efficiency in new-build homes is already available. For example, installing an integrated rainwater harvesting and grey-water recycling system can significantly reduce domestic consumption.

Grey-water is categorised as water used by the household, including from bathrooms, kitchens and appliances that has not had direct contact with human waste. While not suitable for drinking, greywater is an excellent way to water outdoor landscaping and gardens with water that would have otherwise been lost down the drain.

Even in older homes, products exists to help minimise water use, harness water for reuse, conserve energy, and save money. Even small changes like collecting rainwater to use in the garden, or choosing lower flow taps and showerheads or dual flush toilets can make an impact.