I am installing a chimney cooker hood with an extraction rate of 480m/hour. Ducting runs 50cm vertically above the fan itself then horizontally 150cm to vent through an exterior wall.
The manufacturer recommends using 125mm pipe ducting (fan outlet connector is 120mm) but I want to use flat ducting.
Obviously I would prefer it as small as possible whilst maintaining extraction efficiency so is 110 x 54mm sufficient or would 150 x 70mm or even 204 x 60mm be best?
The manufacturer recommends using 125mm pipe ducting (fan outlet connector is 120mm) but I want to use flat ducting.
Obviously I would prefer it as small as possible whilst maintaining extraction efficiency so is 110 x 54mm sufficient or would 150 x 70mm or even 204 x 60mm be best?