| 摘要 |
An infill of multiple-layer panels, each with an air space between inner and outer leaves, is provided in a curtain wall frame structure. The panels have peripheral gaskets that provide channels surrounding the internal air spaces of the panels. The channels are connected in at least one group to gas pumping means. In one mode the channels communicate with the panel internal spaces and the pumped gas forms a venting flow through said spaces. In another mode the gas can be held under pressure: this can be to keep the internal spaces filled with a particular gas or for pressure testing, e.g. at the peripheries of the panels.
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