Windows and Glazing

The majority of heating and cooling happens through your windows.

• Place largest windows in north facing rooms to optimise the heat gain.
• The east should also have plenty of windows for an early morning warm up.
• Glazing on other areas should be reduced to prevent unwanted heat loss.
• Maximise the distance between the house and any other building or item that may block the sun from the north.
• Eaves or other overhangs prevent overheating by the high summer sun.
• Provide shading to east, west and north facing rooms, particularly glass areas.
• Choose the best window glazing for your climate. To avoid heat loss or gain, use high performance windows with appropriate shading or insulation properties eg Double glazing. Look out for the Window Association of New Zealand Window efficiency five-star rating.

Windows with built in vents

Use window joinery with built in ventilation, or security catches that allow windows to remain partially open. This will ensure your home “breathes”, even when you’re not there.