| 摘要 |
<p>A ventilation system for ventilating an accommodation space, the ventilation system being operable in a passive ventilation mode and an active ventilation mode, the system comprising: a sensor for outputting a signal indicative of an actual air flow rate in the system; a controller for automatically turning on a ventilation fan to switch the system to the active ventilation mode if the actual air flow rate indicated by the sensor signal when the system is in the passive ventilation mode is unable to meet a target air flow rate, and wherein, in the passive ventilation mode and/or the active ventilation mode, the controller modulates the actual air flow rate in dependence upon the sensor's signal to attempt to make the actual air flow rate meet the target air flow rate.</p> |
