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The answer is in the STARS This page explains the General WERS Ratings charts that follow on the next
pages Five stars for top performers, one star for lowest.... the WERS star system provides a simple, accurate measure of the efficiency rating of the windows you select. The stars are not intended to give an exact measure but rather accurate indication within given bands of performance. Often a half star will appear. The calculations are made using software developed by BRANZ, the Building Research Association of New Zealand. The stars rate the glass and glazing options used, the different types of frame and the various combinations of both. FRAMES INCLUDE:
GLAZING INCLUDES:
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