| 摘要 |
<p>A ventilating unit (4) for use on the inner side of an outside wall (1) of a building comprises a passage (3) for passing outside air through the outside wall (1), control means (8) for regulating the amount of outside air that is admitted through the passage (3), and a control unit (7) for controlling the control means (8) on the basis of the pressure difference between the inner side and the outer side of the outside wall (1). According to the invention the ventilating unit (4) is provided with a passageway (5), which extends between the passage (3) in the outside wall (1) and the bottom side of a heating element (2) when the ventilating unit (4) is installed, whilst the control means (8) are mounted in the passageway (5). <IMAGE></p> |
