| 摘要 |
particular when removing cavity wall insulation material (30) therefrom, the duct (60) comprising a main body portion (62) comprising a first tubular portion (66) at least partially receivable, in use, in the outlet aperture (54), a spigot portion extending, in use, outwardly from the wall (12, 14, 16) and communicating with the first tubular portion (66), and a flange (64) interposed between the first tubular portion (66) and the spigot portion, the flange (64) providing, in use, an abutment surface for limiting the extent of insertion of the first tubular portion (66) into the outlet aperture (54). The duct (60) may additionally comprise a sealing means (68) for sealing the duct (60) to the exterior of the outer leaf (14) of the cavity wall to capture insulation material (30) as it is extracted from the cavity (16) during a removal process. The spigot may be connected to a vacuum system via a Y shaped connector conduit. |
