| 摘要 |
<p>The ventilation damper apparatus 10 comprises a movable damper 12 suitable for opening and closing a ventilation opening of a building; a stiff side wall 14 extending from each side of the movable damper; and a stiff occlusion element 16 including a plurality of airflow openings, the occlusion element extending from one stiff side wall to the other stiff side wall and being suitable for limiting access through the ventilation opening when the damper panel is open. Acoustic insulation 28 and thermal insulation 24 may be provided on the movable damper. The side walls may comprise first 42 and second 44 side panels that pivot relative to one another as the movable damper moves. The occlusion element may include first 50 and second 52 occlusion members, which comprise louvers spanning between respective first and second side panels or perforated sheets forming an insect screen. The apparatus may include a drip tray 34 to expel rain water. A ventilated building comprising the ventilation damper apparatus, and alternative ventilation damper apparatus are also claimed.</p> |
