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Design to avoid overheating

Conclusions we derived from our indoor climate study:

1. Gaps will significantly increase discomfort especially to occasions with low sun angles. If we consider 28°C as the maximum allowed COT, the gaps will cause discomfort for rather many hours over the year (in blue).

2. An internal roller blind of 10% Openness Factor, will significantly reduce the overheating risk (COT marginally exceed 30 °C). However, COT is expected to exceed 28°C for quite a few hours over the year. As internal fabrics of 10% OF will not be sufficient for glare control, they can be used only to improve the thermal comfort of the occupants.

3. An internal roller blind of 5% Openness Factor, will perform significantly better (than a 10% OF fabric) as it only marginally exceeds the recommended 28°C for very few hours over the year. In this case, the internal roller blind can also be used for glare control.

examined as a solar control option.

4. The advantage of frit is that is a angle interdependent and yet an unevenly distributed solar control mechanism. This means that we can place frit in the areas more required without altering the quality of transmitted light nor unnecessarily reducing the Light Transmittance values. The assessment of the required frit on each glazing unit was based on a spatial analysis of the (Corrected)  Operative Temperature. 

Overheating risk in sunpatch areas (as a result of gaps in between the screens)

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