Abstract: A hot water shrink tunnel includes a heat chamber that has no flue or vent into the heat chamber, an inlet opening and spaced therefrom an outlet opening. Each opening is closed by an end closing device, such as a curtain. A conveyor carries a product through the heat chamber from the inlet opening to the outlet opening. A duct is mounted adjacent each end opening, where the duct includes a shroud of a size and design to capture hot water vapor that issues from the heat chamber when a product passes through the end closing device of the non-flued/unvented tunnel.

Abstract: A hot water shrink tunnel (10) includes a housing (11) in which there is a heat chamber. The heal chamber housing (11) has an inlet opening (12) and spaced therefrom an outlet opening (13). Each opening (12/13) is closed by an end closing device (21) in the form of a curtain and through which product can pass. A conveyor (14) enables product to be conveyed through the heat chamber from inlet opening (12) to outlet opening (13). An external duct (17) is mounted adjacent end opening (12) and similarly a duct 19 adjacent end opening (13). Each duct includes a shroud (19) of a size and design to capture hot water vapour which, in use of the shrink tunnel, issues through the end opening (12/13) when product passes through the curtain. The heat chamber does not require a flue or venting to atmosphere.