| 摘要 |
<p>An adjustable ventilation coupling (1) for enabling air flow to or from a wall, ceiling or floor cavity of a building comprises at least two adaptors (3, 5), arranged to engage in use with respective external and internal vents of the building. Each adaptor (3, 5) defines a cavity (13) in (5) which the respective structure vent is received, the cavity (13) being cuboidal so as to receive an air brick The coupling 1 further comprises connectors (7, 9) which connect the adaptors (3, 5) to an air transfer duct (11). The arrangement of the connectors (7, 9) and air transfer duct (11) is such as to enable the orientation of at least one adaptor (3, 5) to be (10) varied relative to the air transfer duct (11) so that in use of the coupling (1) the lateral spacing between the adaptors (3, 5) can be varied whilst maintaining the adaptors (3, 5) in a desired orientation.</p> |
