| 摘要 |
A vent assembly comprises a length of tube 2 and a pair of ventilation face plates 1. At least one of the face plates has a socket 3 into which the tube is glued. One of the face plates may have a means to adjust the flow of air through the vent. One of the face plates may be fixed to the tube by clips, screwing or tolerance fit. One or more parts of the assembly may be made from plastics or metal. One of the face plates may be pre-assembled with the tube. The assembly may comprise of more than three parts. The face plates may have flat, convex or concave profile. The vent assembly may be installed in a hole through a wall 4 that is within an arms length of a window such that a pre-assembled vent assembly with an exterior face plate is installed into the hole from within a room by passing the vent assembly through an open window. Installation through an open window prevents the need to work at height on ladders. One of the face plates may have a fly screen. The tube may be cut to length to match the wall thickness. |
