Window Energy Efficiency
Altair® Louvre Windows provide energy-efficient control of natural light and fresh air in a building. Increasing natural ventilation can improve the health and productivity of building occupants whilst reducing the reliance on air conditioning.
Maximum Ventilation
Altair Louvres are considered to be the most energy-efficient window on the market, due to their unique ability to provide close to 100% ventilation, which sets them apart from other window systems.
Altair Louvre Window
Compliance with Clause H1
As stated by the New Zealand Building Code (NZBC), “Buildings must be constructed to achieve an adequate degree of energy efficiency when energy is used for modifying temperature or humidity, or both;..”
The NZBC Clause H1 offers a variety of compliance options to which Altair Louvre Windows can meet the minimum energy requirements. For example:
- Using the Schedule Method – Altair Louvre Windows can be used with a low e coating in a timber frame.
- Using the Calculation or Modelling Method – Any Altair Louvre can be used provided other building elements compensate.
Altair Louvres also offer other benefits that are not measured in the energy ratings, including:
- Health benefits of ventilation
- Ability to precisely control ventilation
- Stylish aesthetics
- Customising opportunities
Sealing
In winter, the last thing that you want is windows that don’t seal tight and let in cold draughts. Altair Louvre Windows provide tight sealing due to:
- A living hinge design that prevents water and air penetration.
- An over-center locking mechanism for strong closure.
New Zealand Climate Zones
There are a variety of good Altair Louvre Window design principles that can achieve a comfortable indoor climate and save energy used for heating and cooling across all New Zealand climate zones.
Consider installing a number of clear windows in the northern orientation of the home with high window system R-values (this can be achieved through framing, low e glazing or the double glazed IGLU System). By incorporating Altair Louvre Windows next to fixed lite panels, a beautiful view can be framed while still gaining natural ventilation to improve the indoor air quality and reduce the build-up of mould or condensation.
Climate Zone 1
Auckland, North
Climate Zone 2
Balance North Island, except Central Plateau
Climate Zone 3
South Island & Central Plateau
Cross Flow Ventilation
The importance of window placement.
Good
Better
Best
Excellent
Internal Ventilation
Ventilation openings are often needed in internal walls.
The drawing above illustrates how a ventilation adjustable louvre window between rooms is more efficient than just having external louvre windows alone.
Thermal Chimney Effect
Installing windows up high.
Energy Efficiency
Altair Louvre Windows by Breezway are an energy efficient way to control natural light and fresh air into your home or office environment.
The video explains the benefits of Altair Louvre Windows that maximise natural ventilation as well as sealing tightly.
Ventilation Rates & Energy Efficiency
Ventilation is essential to create a naturally comfortable home. This short video compares the ventilation rates of different window types.
Natural Ventilation in Offices Case Study
The Breezway Head Office displays a spectacular showcase of Breezway Altair Louvre Windows, in particular the Altair Powerlouvre Window that has been integrated into a building management system to achieve a cost efficient, environmentally sustainable commercial building design.