Having a kitchen extension built with downdraft induction hob on island (Elica Switch model), which ducts out the building. The spec of the duct should be 6" round or equivalent rectangular ducting. I was told by Elica this must not be reduced in size. The builder was given this information and kindly sourced some ducting and installed it at build stage. The duct runs in between the concrete slab and wooden floor and out the side of the house. The floor structure was sort of designed to...
Downdraft Extractor Ducting - Incorrect size
Downdraft Extractor Ducting - Incorrect size