Extractor fan question

ezra_

Hi guys,

We are getting a new cooker in out kitchen. There wasn't previously an extractor fan, so the whole place smoked up and got quite dirty. As we are moving in, we want to install one.

The plan originally was that;
since we are plasterboarding over an old exterior door, we could run the ducting through the plasterboard and then through the door. However, when in B&Q, the lady told me partner that you don't need to vent externally.

I'm skeptical of this, and we are talking of a compromise that we vent into the cavity created between the plasterboard and the old door. there is a lot of air coming through this door at the moment.

Will this just result in gunk building up on the old door / plasterboard? Would doing something like u-bending the ducting at all behind the plasterboard help?

Thanks!

BryanF

This: http://www.besthoods.co.uk/2011/10/essential-questions-about-recirculation-cooker-hoods/

Or this http://www.environ.ie/en/Publications/DevelopmentandHousing/BuildingStandards/FileDownLoad,1647,en.pdf

You duct/ vent to the outside. Do not terminate a duct/ vent into a cavity or an attic space.

dodzy

ezra_ wrote: »

Hi guys,

We are getting a new cooker in out kitchen. There wasn't previously an extractor fan, so the whole place smoked up and got quite dirty. As we are moving in, we want to install one.

The plan originally was that;
since we are plasterboarding over an old exterior door, we could run the ducting through the plasterboard and then through the door. However, when in B&Q, the lady told me partner that you don't need to vent externally.

I'm skeptical of this, and we are talking of a compromise that we vent into the cavity created between the plasterboard and the old door. there is a lot of air coming through this door at the moment.

Will this just result in gunk building up on the old door / plasterboard? Would doing something like u-bending the ducting at all behind the plasterboard help?

Thanks!

The lady was talking sh1te. Vent outside, end of.

dpofloinn

She wasn't necessarily talking sh1te she may have been talking about re-circulation extractor hoods they don't vent externally

biketard

If you have an easy solution to venting outside, take it. Recirculating vent hoods are a (pretty decent) compromise when venting outside is... complicated, but in your case that's not a problem.

Calahonda52

ezra_ wrote: »

The plan originally was that;
since we are plasterboarding over an old exterior door, we could run the ducting through the plasterboard and then through the door. .

I'm skeptical of this, and we are talking of a compromise that we vent into the cavity created between the plasterboard and the old door. there is a lot of air coming through this door at the moment.

Will this just result in gunk building up on the old door / plasterboard? Would doing something like u-bending the ducting at all behind the plasterboard help?

Thanks!

WTF:mad:
Is the above for real or are you lining up the white stuff with a cc or just taking the micheal?

ezra_

Calahonda52 wrote: »

WTF:mad:
Is the above for real or are you lining up the white stuff with a cc or just taking the micheal?

Not quite.

If the fan is able work and not be vented (as per the girl) then why not vent the smoke into a space that is exposed to the outside by an old door that isn't airtight?

Of course, if the fan isn't really able to work without a vent, then my idea doesn't work. But that is the point of the thread.

dodzy

Please ensure you use insulated board over that door. No harm sealing up the draught areas also before boarding. This will help with heat retention later. Then vent straight thru it. Venting into the cavity will be far less efficient compared to going right out. The inner wall of the board will be destroyed over time with grease and moisture.

lgk

If you go for the recirculating hoods as the lady in B&Q was most likely referring to, you need to factor in the cost/hassle of replacing of the charcoal filters every so often.