| 摘要 |
<p>In most houses there is a primarily heated room, e.g. a living room, in which a uselessly overheated amount of air will be present just underneath the ceiling. It will be unprofitable to exploit this excess heat in a ventilation and heat recovering system of a conventionally high capacity and with associated operation costs, but the invention provides for a simple and inexpensive system, which can operate without any operational costs, viz. solely by a natural draught, and by means of which the said excess heat can be exploited for a reasonably efficient heating of a weak ventilation air flow to one or more other rooms in the building. The natural draught is provided by means of particular, roof mounted ventilation hoods (2, 22), which will respond to the wind by producing draught (2) and air pressure (22), respectively in a well defined manner.</p> |
