| 摘要 |
A ventilating system for a building comprises fan means (14) arranged to draw air in from selected locations and deliver this air into the accommodation space (13) of the building, a plurality of temperature sensors (T0, T1, T2, T3), one for each location from which the fan means may draw air and one for the accommodation space, and control means responsive to the temperature sensors to select the location from which the fan means draws in air. |
