| 摘要 |
<p>A covert roof ventilator unit (10) is manufactured as a planar or substantially planar configuration, having a lower wall (13) and an upper wall (52) hingedly connected thereto which upper wall (52), when the unit (10) is in use on a roof is closed upon the lower wall (13) to form a hollow ventilator having an aperture (24) in said lower wall (13) for ventilating a roof space on which the unit (10) is used, said walls when closed together defined an elongate aperture (82) at a toe end portion of the unit (10). Baffle elements (32, 54) provided on the said walls (13, 52) intermesh in use to prevent the ingress of small birds, mammals and large insects to the roof space via the elongate aperture (82) and the aperture (24) in said lower wall (13). <IMAGE></p> |
