| 摘要 |
A panel building component for use in conjunction with a heat-insulating wall of the type having a porous layer through which a transverse air flow is maintained in a direction opposite to the direction of the temperature gradient. The panel building component comprises a frame and two spaced layers secured to the frame and defining an air space between them. One layer is rigid and impermeable to air flow whereas the other layer has a limited permeability to air flow. The panel building component is mounted as a lining or cladding on the wall with the air-permeable layer in face-to-face engagement with the porous layer of the wall. The air space is adapted to be connected to a fan for maintaining a reduced pressure in the air space to cause external air to flow through the porous layer into the air space.
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