| 摘要 |
<p>The ventilator for circulating air underneath shingle-board roofs consists of a profiled section (1) which has two curved surfaces (2) sheltered against the weather. The two surfaces are spaced apart from the roof surface (3) and each of the two surfaces has holes (4) as air outlets. Vertical duct (5) takes the air to the outlet holes (4). The air is guided towards the outlet holes by a top, closed part (6) of the section. That part of the section turned to face the roof surface (3) has a fixture strip (7) on each side of the duct (5) for fixing it onto the roof. The fiture strips (7) are joined to the surfaces (2) by means of two vertical pieces (8) forming the sides of the duct.</p> |
