Patent ID: 7597857

Claim:
An apparatus comprising: a first enclosure containing a gas/smoke/vapor generating device; at least one inlet to allow air to pass into the first enclosure; a first enclosure outlet to allow air to pass out of the first enclosure; a second enclosure separated from the first enclosure by a partition; and a fan located in a fan enclosure, wherein the fan enclosure is located within the second enclosure and is provided with an inlet, the fan enclosure inlet comprising an opening in the partition and wherein the first enclosure outlet is in connection with the fan enclosure inlet, and wherein an outlet of the fan enclosure comprises a tapering enclosed portion which tapers towards an outlet in a wall of the second enclosure; whereby the fan causes air to pass from the at least one inlet through the first enclosure, the fan enclosure and fan outlet, the air at least partially entraining smoke/gas/vapors emitted from the smoke/gas/vapor generating device.