Winter heat loss through Windows

Winter heat loss Unprotected glazing and single glazing in particular means the surface of the glass is noticeable colder than the warm air in the room. This lowers the room temperature and produces draughts. The Relative Air Velocity ends up too high and occupants...

Summer heat gain through Windows

    It is important to protect windows with external shading devices, through appropriate window sizing and location, in order to minimise heat gain in summer. Comparison of heat gains through different treatments for windows in summer (According to...

Energy Efficient Window Design

  The total radiation received per window varies according to the time of the year and the orientation. In summer, all windows receive heat gains, in particular those facing east and west. Whereas in winter, only windows facing north, north-west and north-east have a...

The 20/20 House Part 6 – Why the 20/20 House?

The 20/20 House Part 6 The Gruen Eco Design blog about how to convert your dream from an energy efficient home into a reality. Why the 20/20 House? You may ask yourself: Why the 20/20 House? What does it mean? I guess if you have studied architecture and even more so...

Why Is Good Window Design So Important?

Windows are essential for a house and the comfort and well-being of its habitants, as they let natural light and fresh air into the building and enable views. Appropriate window design, size, location and glazing treatment, combined with shading and internal covers,...