Galvanised Iron Metal Ducting



Metal ducts are made from sheet metal (galvanized or stainless steel), cut and shaped to the required geometry for the air distribution system.


Since metal is a good thermal conductor, such ducts require thermal insulation, the commonest material for which is glass wool, usually in roll form (known as wraps or wrapped insulation), wrapped around the outer duct wall.Wraps incorporate an aluminium foil facing that acts as a vapour barrier.


Insulation can also be installed on the inner wall of the duct (duct liners), as glass wool duct wraps or duct slabs faced with a glass matting or mesh providing acoustic insulation and strengthening the inner face of the duct.

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