Abstract: A plenum device and a plenum system, the plenum device includes a body section having a first opening at a first end and a second opening at a second end defining a curved air flow channel therebetween, the second opening having an aperture; a fixing bracket moveably coupled to the exterior of the body section and configured to secure the plenum device to a ceiling void space; and an adjustment mechanism arranged at the second opening of the body section and configured to vary the size of the aperture. The first end is configured to be coupled to an air duct and the second end is configured to be coupled to an inlet/outlet port. The fixing bracket is configured to be moveable relative to the body section between a plurality of positions and includes an adjustable engagement mechanism arranged to secure the fixing bracket in one of the positions.

Abstract: Disclosed are various aerosol provision devices that may inhibit or prevent the accumulation of condensation, during use, in a conduit that connects the device's heating chamber to the device's exterior. In devices according to one aspect, the interior surface of such a conduit is heated during a session of use. In devices according to another aspect, the interior surface of such a conduit is heated, such that at least a portion of its interior surface attains a temperature greater than or equal to 85° C. In devices according to another aspect, a portion of the interior surface of such a conduit has a thermal conductivity greater than or equal to 1 W/m/K. In another aspect, the interior surface of such a conduit is heated such that at least a middle portion of the interior surface attains a temperature greater than or equal to 70° C.