Crimsafe is WERS Rated


Households, architects, planners and urban developers are being urged to contribute to cleaner more sustainable living and Crimsafe now becomes an even smarter choice to provide Australian homes with incredibly strong security that contributes to the overall energy efficiency and comfort of the home. Call it 'sustainable security' if you like.

WERS rating for Crimsafe

WERS (Windows Energy Rating Scheme) now recognises that Crimsafe security screens improve the energy efficiency of windows and doors.

Every window in the Australian building market has been rated by WERS for its annual energy impact on a whole house, in any climate of Australia.

Solar Heat Gain Coefficient

Crimsafe can decrease solar heat gain in a home by up to 53% keeping the home cooler in summer and restricting heat loss during winter. A reduced need for air-conditioning and artificial heating contributes to lower energy costs.

A major element of determining a windows WERS rating is its Solar Heat Gain Coefficient (SHGC). The SHGC is the measure of how well a window blocks heat caused by sunlight. The lower the value of a window's SHGC, the less solar heat it transmits.


Up to 40% of heat gain and heat loss within a home occurs through the windows.

When Crimsafe is applied over a generic single glazed window the cooling efficiency of the window increases from a Zero Star rating; NO additional benefit (fig 1), to a 3 Star rating with a reduction in solar heat gain of UP TO 53%, keeping the interior of the home cool in the summer (fig 2).

In the winter months Crimsafe works with the existing windows to limit the escape of warmth from the home, and heat retention efficiency increases. The heating rating improves from a Zero star rating; NO heat retention benefits (fig 1.), to a 1.5 Star rating with Crimsafe applied (fig 2).

When Crimsafe is applied over 6.38 Clear Low E glass, the cooling rating increases from a 1.5 Star rating to a 4 Star rating greatly enhancing the cooling attributes of a home owners glazing investment.

FROM THIS: Generic Standard Industry Typical Aluminium Window - Single Glazed

fig 1.

WERS Generic Window Rating

TO THIS: When Crimsafe Security Screen is applied

fig 2.

WERS Crimsafe Rating

Annual energy performance (stars and % improvements) are calculated using Nationwide House Energy Rating Software according to procedures of WERS 2008 and the results are presented in Standard International Units.


Crimsafe gives the ability for a home to gain higher home energy star ratings by applying Crimsafe security screens to existing window ratings. The greatest benefits are gained when Crimsafe is placed over the entire window not just over the opening portion.

Crimsafe is WERS rated to reduce solar heat gain by up to 53%.