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If the quality of doors and windows is poor, not only can they not block the sound of rain outside the window, but indoor heat will also flow out directly from the doors and windows. Therefore, a good window can be called a building companion, requiring excellent performance such as insulation, heat insulation, and noise reduction. Of course, for passive rooms known for their constant temperature, humidity, and quietness, the design of doors and windows is more crucial. Today, let's talk about passive windows and their companions in passive rooms.

What is a passive window? Although passive windows are not significantly different from regular windows in appearance, they differ from regular windows in design and installation. The passive window is an integrated system that includes a unique external installation method, a special new energy-saving subframe system, pre compressed expansion cotton, waterproof and gas blocking film, waterproof and vapor permeable film, window sill panels, etc. This requires scientific calculation and selection of configurations based on the actual engineering situation, using measures such as no thermal bridge and airtightness. The degree of integration between passive windows and passive buildings is much greater than that of ordinary windows and buildings.

According to the research results, the windows of passive rooms need to meet the

following four characteristics:

1. Low energy three-layer glass or equivalent products;

2. Warm edges and high insulation performance;

3. High insulation window frame;

4. Optimized wall installation method.

Only when passive windows meet these conditions can they achieve greater insulation, noise reduction, and waterproofing effects.

Passive window technical parameter requirements: effective U-value of the window Uw=0.80W/(m) ² K) The temperature of the connected nodes cannot be more than 3 degrees lower than the indoor temperature. Therefore, the effective U-value can only be determined based on the environmental foundation of each region.

Passive windows have little difference in material compared to regular windows. Passive window systems can be divided into passive aluminum system windows, passive aluminum clad wood system windows, and passive PVC system windows.