The plastic-coated lining of this aluminium combi- extraction duct makes it more robust than standard extraction duct.
The outer vinyl gives it greater elasticity and flexibility which, when installed, will prevent tearing and offer a longer life.
It is also more resistant to moisture, which is not negligible when used for indoor gardening in greenhouses or hydroponic shops.
To guarantee perfect watertightness when fixing it, you can use aluminium and PVC clamps or ventilation tape.
When installing a combi-duct, limiting its length as well as the number of bends and branches reduces « pressure losses ». The straighter and shorter the duct, the more air will circulate unhindered.
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Sheaths & collars