Vent - suitable for extractor?

chou-chou

I'm looking at getting a vent (for an external wall) for a new extractor over a gas hob. Lots of them say 'not suitable for use with a gas appliance' but I'm not sure if that would be OK for this purpose - it' snot a gas appliance (electric extractor) but it is over a gas appliance (gas hob).

Can anyone advise?

Link to the kind of thing I mean.

Belenus

If you mean that this vent cover will be fitted to an outside wall with a cooker hood and fan internally and a suitable conduit through the wall, then it is fine.

I have a similar vent cover in my own house and I have had them in previous houses where the cooker hood vents to the outside.

I suspect that 'not suitable for use with a gas appliance' means you can't use it if you are venting hot combustion gases from a gas fire or boiler etc through the wall. The heat would melt the plastic and possibly be a fire risk.

A cooker hood should only vent warm air well below the melting point of the plastic as the hot air from the hob burners is mixed with a lot more air at ambient temperature.

I checked mine once with 4 hob burners on full and the air coming through the vent outside was barely warm.

chou-chou

Belenus wrote: »

If you mean that this vent cover will be fitted to an outside wall with a cooker hood and fan internally and a suitable conduit through the wall, then it is fine.

Thanks Belenus, that's exactly what I mean. I thought that would be the case but wanted to sense check with someone else. Will go ahead and order it now

FreeBear

One of those flappy vents are more than adequate for an extractor hood. Just make sure it is sited in a sheltered position and not facing prevailing winds.

If you want something a little more discrete - https://www.selcobw.com/manrose-slimline-airbrick-204-x-60mm
I used something similar when putting an extractor in for my hob. You'd be hard pushed to see it

Belenus

FreeBear wrote: »

One of those flappy vents are more than adequate for an extractor hood. Just make sure it is sited in a sheltered position and not facing prevailing winds.

I suspect that the positioning is already determined by the position of the hob and hood inside the kitchen.

In my current house our cooker hood vents to the outside precisely where the wind whistles down between our house and next door but it still works just fine.

Our bedroom is immediately above the vent and, at night in very high winds, we can occasionally hear the plastic flaps of the vent cover flapping against each other but that isn't a problem as there is so much other wind noise going on anyway.