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Windows and doors have a big impact on the interior comfort level of homes. Retaining warmth in winter reduces power bills and increases well being. We’re pleased to offer WEERS - Window Energy Efficiency Rating System system to help inform your Altherm choice.


WEERS - Window Energy Efficiency Rating System

This system allocates between one and six stars to a job lot of windows and doors – so is more descriptive than the Energy Star mark programme. The WEERS system has been adopted by WANZ (the Window Association of New Zealand) and uses its own star logo. The more stars, the better the thermal efficiency.  

Consumers can see the energy rating for their job lot of windows and doors on their window quotation or in a separate report.