| 摘要 |
A ventilation system comprises a ventilating unit 14 being arranged to draw air from a roof space 11 or fresh air from outside, a diffuser 18a coupled to the ventilation unit 14 and adapted to deliver air into an accommodation space 13, the system including a means of drawing air from the accommodation space 13 into the diffuser 18a and being configured to mix with the air being drawn from the roof space 11 or being drawn from outside so as to increase the temperature of the air to be delivered into the accommodation space 13. The ventilation unit 14 may comprise of an air handling unit 20 provided with a fan 'F' having an air filter and dampers 'D' for opening and closing ports P1, P2 that communicate with the roof space 11 via a duct 15 or the outside via a duet 16. A controller may be provided having at least one sensor for measuring the temperature at the ducts 15, 16, and the accommodation space 13 and controls the dampers 'D' depending on the desired temperature in the accommodation space 11. The diffuser 18a may draw in air from the accommodation space 11 via an extractor fan or by negative pressure created by the incoming air. The air supplied to the accommodation space 11 may be heated by an external solar panel located on the roof 10. |
