Ducting fumes from ventilated induction hob on a kitchen island

[Smallholdertoo]

We a have an almost complete new airtight house (0.59ACH) complete with MVHR. We will have an an induction hob with built in ventilation. The hob will be set to recirculate with most of the grease being absorbed by the carbon filter.

 

The kitchen fitter and a diagram within installation instruction seem to suggest that the exhaust air should be allowed to find its own way into the kitchen from the hobs exhaust.

Per AEG.pdf

 

I feel the slightly greasy warm moist air will do no good to the insides of the island and suggested to the kitchen fitter that it would be better if we used a 220x90mm PVC duct to connect to the hob (AEG provided the appropriate adapter with the hob) directly  to a hole through the plinth into the kitchen. I will find a grill to cover over this. The 2m of duct plus a 90degree bend will only cost £30 so to me it seems to be a no brainer. Any thoughts?

 

The diagram below shows the proposed path of the duct.

 

With duct.pdf

 

 

Edited 10 hours ago by Smallholdertoo
typos

[Russdl]

What hob is it? Our down draft induction hob has a grease filter followed by a carbon filter and then discharges to the room at floor level. 
 

I would certainly be concerned about ducting air that hadn’t been filtered for grease into the units or at floor level. At least on the floor you could clean it with ease, into the units it’ll just go rancid over time and, well…

Edited 8 hours ago by Russdl