| 摘要 |
<p>The ventilator for a wall comprises a first profile of heat conductive material, the inner face of which carries fins and the outer face of which defines an external air passage with the facing panel. The inner face of a second profile carries other fins coated with heat and noise insulating material and which cooperate with the fins to form an elongate internal air passage. Air is admitted through the air-intake and heated until it is discharged into the room via the outlet.</p> |
