Coast & Hinterland Glass & Aluminium
Engineered for Australian conditions
- Energy efficient windows & doors
Beautiful windows are possibly the most complex and interesting elements in the fabric of our homes. They provide light and fresh air, and offer views that connect our interior living spaces with the great outdoors. However, ordinary windows can also represent a major source of unwanted heat gain in summer and significant heat loss in winter.
Today, remarkable new framing and glazing materials have changed the energy performance of windows in a radical way. Energy efficient windows will make your home more conformable, dramatically reduce your energy cost and help create a brighter, cleaner and healthier environment.
Windows can severely impact the heating and cooling loads of a building. Between 46% – 61% of a home’s heating energy can be lost and between 79% – 86% of its heat gained through windows. Improving their thermal performance increases comfort and reduces energy costs and Australia’s greenhouse gas emissions.
- U-Value (Uw)
U-Value (Uw) measures how readily a window conducts heat. It is a measure of the rate of non-solar heat loss or gain through the assembly.
The rate of heat is indicated in the terms of the U-Value of a window assembly which includes the effect of the frame, glass, seals and any spacers.
The lower the U-Value, the greater a window’s resistance to heat flow and the better its insulating value.
- SOLAR HEAT GAIN COEFFICIENT (SHGCw)
Solar Heat Gain Coefficient (SHGCw) measures how readily heat caused by sunlights flows throw a window. The SHGCw is the fraction of incident solar radiation admitted through a window, both directly transmitted, and absorbed and subsequently released inward. SHGCw is expressed as a decimal between 0 and 1. The lower a window’s SHGCw, the less solar heat is transmitted.
SHGCw optimised (tinted) – has the potential to improve up to approximately 1 star.
U-Value – has the potential to improve up to approximately 0.25 stars for each unit reduction in U-Value.
Ventilation – has the potential to improve up to approximately 0.25 stars per additional 20% of openable area.
Each star corresponds to reduction in Heating/Cooling requirements of 15% to 30% on pre improved level. Star uplift due to reducing SHGC reduces cooling load but may marginally increase heating load in cooler months.
Sunshine Coast is in Zone 2 – Zone 2 is from Coffs Harbour to Mackay along the coast
Source – AGWA
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