1 Indicators to measure the energy saving performance of windows

The indicators for measuring the performance of energy-saving windows include four aspects: thermal insulation performance, solar heat gain performance, lighting performance, and air leakage prevention performance. With the improvement of living standards, the thermal comfort performance, noise prevention performance of windows and doors, and condensation performance of windows in cold areas have gradually been recognized.

2 issues to consider when designing windows

In the north, the main function of building windows is to obtain sufficient lighting, and it is necessary to control the windows to obtain reasonable heat when the sun is shining, and reduce heat loss when the sun is not shining;

Fang, by controlling the shading coefficient of the window, the sun's heat gain from the window is reduced.

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