Window Energy Efficiency
Altair® Louvre Windows are an energy efficient way to control natural light and fresh air into your home or office environment.
Energy Efficient Altair Louvre Windows
Reduce your energy bill with Breezway
At Breezway, we believe buildings should be designed to work with nature, rather than sealing up and fighting against it. Breezway Louvre Windows allow air conditioning and artificial lights to be turned off so you can live naturally. View the energy video below to learn more.
Altair Louvre Windows offer the following benefits including:
- Increased energy efficiency, health and productivity of building occupants.
- Reduced need for air conditioning to keep the room at a comfortable temperature, saving electricity and the running costs of a building.
- Low U-values required for energy efficiency compliance/excellence.
To learn more about the benefits of natural ventilation, Breezway has produced a number of Technical Bulletins to assist with your building designs. These include:
- Benefits of natural ventilation
- Ventilation openings of various window types
- The potential advantages of increasing ventilation in schools
- The impact of air infiltration and natural ventilation on annual air conditioning load
0% Fresh air
12% to 30% Fresh air depending on wind direction
40% Maximum fresh air
Breezway Louvre Windows
90% Fresh air regardless of wind direction
Cross Flow Ventilation
The importance of window placement.
Ventilation openings are often needed in internal walls. The drawing above illustrates how a ventilation louvre between rooms is more efficient than just having external louvre windows alone.
Thermal Chimney Effect
Installing windows up high. Another good way to naturally cool a room is to place some Altair Powerlouvre Windows up high. This is effective because rising hot air is able to escape the room through the high up louvres, helping to keep the room cool.
Altair Louvre Windows can:
- Achieve a low a Solar Heat Gain Coefficient when using glass blades (E.g. Tinted glass blades help reduce solar heat gain).
- Achieve very little Solar Heat gain by using timber or aluminium louvre blades to completely block out the sunlight while still allowing maximum ventilation through the window.
- Prevent Solar Heat Gain by angling blades while still allowing ventilation.
- Reduce Solar Heat Gain when using metal mesh screens
Seal tight window
- The living hinge design that resists water and air penetration between the clips and the channels.
- An over centre locking mechanism which applies strong locking pressure to blades when fully closed.
Low U-values allow heat to be transferred through the window slowly, and a high U-value indicates that heat is transferred quickly. The greater the difference between the desired indoor temperature and the outdoor temperature, the more important U-values are. In temperate climates where the outdoor temperatures are seldom extremely hot or extremely cold, the U-value is relatively unimportant.
Altair Louvre Windows can achieve rather low U-values when using tinted glass blades.