The plasticized lining of this aluminium combi Extraction sheath makes it more robust than standard sheaths.
The exterior vinyl gives it greater elasticity and flexibility which, when installed, will prevent tearing while offering a longer life span.
It is also more resistant to humidity, which is not insignificant when it is used for indoor gardening in greenhouses or hydroponic tents.
To guarantee a perfect airtightness when fixing it, you can use clamps or aluminium and PVC 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 without obstacles.
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Sheaths & collars