This section shows you how to choose the most efficient windows for your home

The Window Efficiency Rating System the official New Zealand window & door rating system which is coordinated by WANZ and supported by the New Zealand Government agencies:

Energy Efficiency Conservation Authority

and the

Foundation for Research, Science and Technology

"The design and installation of windows have a major impact on a building's energy efficiency. Windows affect how much energy buildings use, how warm or cold they are and how comfortable they are for the occupants.

The Window Association's innovative Window Energy Rating System will go a long way towards improving energy efficiency in homes.

The Energy Efficiency and Conservation Authority (EECA) strongly supports WERS.

We know it will make a real difference."

Bill Brander, Acting Chief Executive, Energy Efficiency and Conservation Authority

WERS has Government Support

WERS has government support as a national rating system for windows, contributing to domestic energy conservation.

Improving the energy performance of windows also helps to reduce greenhouse gas emissions and to counter global warming.

A similar rating system operates in Australia, using different measure, and is valid for Australia only.