摘要 |
PROBLEM TO BE SOLVED: To obtain the window section of a curtain wall, which has excellent heat-shielding effect, running cost of which is made unnecessary and by which indoor cooling efficiency is not deteriorated. SOLUTION: In the window section of the curtain wall, an air layer 53 is formed between outdoor-side glass 51 and indoor-side glass 52, the lower section of the air layer 53 communicates with the outside air at all times, and the upper section of the air layer 53 communicates and interrupted to the outside air by an upper open-close device 22. Accordingly, since a natural updraft by a temperature rise is generated in the air layer 53 by communicating the upper section of the air layer 53 with the outside air and the outside air is flowed, a heat-shielding effect is improved while running cost is made unnecessary, and indoor cooling efficiency is not deteriorated.
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