150mm ducting rigid and flexible plastic ducting for use with:

• Kair KHRVWH2000 - Big Bertha - Whole House Heat Recovery Ventilation System
• Kair KAKOR
• other 150mm or 6 inch compatible supply or extract ventilation systems including cooker hoods

1. The length of ducting and number of bends will effect performance and should therefore be kept to a minimum.
2. Long runs of flexible duct are not recommended for use on cooker hoods.
3. Ducting components have a simple push fit connection. Flat channel can be easily cut to length using a hacksaw.
4. When installing a rectangular to round adaptor, it is important that the flat side is fixed uppermost. The flap operation of a grille/fan would otherwise be obstructed.
5. When installing a circular through-the-wall duct a core drill can be used.
6. Ducts passing through an unheated roof void should be insulated to minimise condensate formation and must include a condensation trap and means of running off condensate. 
7. Vertical ducts should be fitted with a condensation trap and a weather proof cowl of sufficient free area for the air volume.
8. Horizontal ducts should fall away from the fan unit.

Unless stated all products are supplied in white. Other colours and material, such as galvanised and stainless steel, are available for some parts - please contact us on 08456 44 6001 to discuss your own requirements.