Does a kitchen extractor fan also need an air inlet?

HomerSimpson · 5 Sep 2006

I'm about to fit a large 540m3/hr extractor unit over the cooker and the intallation manual says that I need to have a 500cm2 air inlet in the room to balance the pressure. I understand the theory of this and would be happy to do it if necessary but I just wondered if anyone actually bothered in reality? Does this also apply to small bathroom fans aswell?

JohnD · 5 Sep 2006

You can let it suck air from the rest of the house, ans advantage of this is that the airflow prevents smells from drifting out of the kitchen or bathroom.

If you do put a vent in, have airflow in mind, and put it right at the opposite end of the room so that steam and smells are cleared.

Gasguru · 5 Sep 2006

If you have any open flued gas appliances such as the boiler or gas fire you can cause serious flue prroblems for these.

nstreet · 5 Sep 2006

likewise, if you have a coal or wood fire in the lounge, you may find you end up with a house full of smoke as the air will flow through the route of least resistance, i.e down your chimney

ChrisR · 5 Sep 2006

Wouldn't mind a quid for every time someone complained about their bathroom fan, where the thing was trying to suck from a closed room...

Commonest answer - trim the bottom off the internal door

Rob · 5 Sep 2006

ChrisR how does the fan act when this happens, i know i go to loads where the fan is making an incredible noise

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Does a kitchen extractor fan also need an air inlet?

HomerSimpson

JohnD

Gasguru

nstreet

ChrisR

Rob

DIYnot Local

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