Overheating protection by solar shading

If the solar wall heating is designed for a large contribution to heating (large solar fraction), passive measures against overheating in summer might not be sufficient. In this case, active shading elements have to be used. This also occurs if inhabitants do not tolerate temperature swings (for example, in an office building). The costs for active shading are considerable. The reason is that either the shading device must be integrated within the transparent insulation product or an external robust shading device must be installed. Wiring, weather protection, control from inside and power connection for motor drives add to the cost of the façade. If possible, shading should be combined for both windows and transparent insulation to reduce extra costs. Active shading adds about €200 to €250/m2 to the costs of the transparently insulated façade and should be avoided.

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