hi gang.
Im starting the work on my kitchen island this week, more specifically the downdraft hob.
As my floor is suspended, (UFH in biscuit on 170mm PIR) i have left an opening where the hob is to go so i can bring the ducting up into the cabinet from the outside wall. Its a 2m straight run from the double airbrick so i can simply pass a 2m 220x90 duct through from outside, my joists go in the right direction, no biggy. But it just dawned on me that this duct should be insulated as it will be pulling hot air down into the cold void below the insulation.
Am i overthinking this or should i be looking to insulate the rectangular duct? if its at a slight dowanward angle away from the entry point under the cabinet then would it matter that there is condensation?
- should i insulate the ducting somehow? https://domusventilation.co.uk/catalog_products/megaduct-220x90-insulation-1m/
- should i be putting a shutter or butterfly inline somewhere to stop backdraft into my warm house?
Be interested in what other people have done here.