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 yesterday at 21:04 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 22 hours ago by Russdl

[Smallholdertoo]

11 hours ago, Russdl said:

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. 

It is a AEG Series 6000 TCH74B01CB 70cm Black Electric Induction Hob With Extractor. It does have a grease and carbon filter which removes 85% of grease - leaving 15% which is why I said "slightly greasy ...air"

 

With a bit of luck the remaining grease will be removed by the grease filter within the MVHR kitchen extract grille, which is between the island and the sink!

Edited 11 hours ago by Smallholdertoo

[Tetrarch]

We've had our 900mm Neff Downdraft I98WMM1S7B for over 18 months now. Our MVHR has a double extract (almost) directly above the hob.

 

The outlet vents through an open vent in the plinth, it has a 90-degree vent on floor level but isn't even ducted to the opening. I took the picture attached just now and took the opportunity to remove the vent and check the opening. There is absolutely no presence of any grease build-up or residue there. The MVHR vent is also grease-free as far as I can tell

 

Regards

 

Tet

 

[Smallholdertoo]

47 minutes ago, Tetrarch said:

We've had our 900mm Neff Downdraft I98WMM1S7B for over 18 months now. Our MVHR has a double extract (almost) directly above the hob.

 

The outlet vents through an open vent in the plinth, it has a 90-degree vent on floor level but isn't even ducted to the opening. I took the picture attached just now and took the opportunity to remove the vent and check the opening. There is absolutely no presence of any grease build-up or residue there. The MVHR vent is also grease-free as far as I can tell

 

Thanks for the reassurance. Looks like I was worrying when I didn't need to.