I am moving my kitchen to a small internal room, (around 11 cubic
If I have a gas hob I believe I need an extractor fan.
What if I have an electric ? Does anyone know the building regs ?
Basically it took me 1.5 days to drill a flue hole I don't wanna have
to repeat it for a ventilation hole.
Cheers in advance.
A room without windows or ventilation with a gas appliance is a big NO !!!
Even with electrical cooking appliances and no ventilation you run the risk
of condensation problems with a the steam that is produced. So either way
you'll need some sort of venting into the room.
You will need some sort of inlet and outlet ventilation because you can't
extract anything if nothing is coming into the room. The whole point of
proper ventilation is to create air change at a set rate for the size of
room and this then varies according to appliances that are used in it.
One way around ventilation problems is to vent one room into another which
already has permanent vents. But this can also cause the transfer of smells
and moisture into other areas of the property where you don't really want
them to be.
Remembering that this is an internal room, so no matter what system you use
to extract air from it, you'll also need to allow air to flow back into it.
So to create a proper flow and properly vent the room, you'll need to set up
Big Wallop is basically correct. You will need at the least an extractor
system whose size is defined in the regulations for the size of room and
its intended purpose.
I am not clear as to what the flue hole was for, but there is a chance
you could extract into that.
ou proably need at least a 6" fan.
As far as ingress goes, again teh regulations are specific. There needs
to be a way for fresh air to enter the room. This may be a vent in an
outside wall, with or withouit a dicting system, or it may under certain
circumstances which may or may not apply in your case, be some form of
internal vent or 'leaky door' between the kitchen and a room that has
If you HAVE and outside wall, teh simplest thing to do is to cut a oair
of holses in it as far apart as possible, 6" fan on one, and a grille on
the other - probably equipped with a 'hit and miss' sliding plate.
You may also need to look at fire esacpe routes from a room with no
windows - smoke alarms covering exit routes may be required.
None of this is going to be trivial.
Most fan vented rooms I've seen just have an exhaust fan. The air
comes in through the gaps around the room's door, through the other
rooms, and initially through the various draught sources in the house.
So I think it depends on your level of existing air throughflow, and
how much movement you need. If you have a well draughtproofed door and
house I'd agree with BigWallop. But those of us that live in ancient
ruins needn't worry so much about providing extra intake.
HRV passively moves heat in the outgoing air to the incoming air.
Kitchens produce a lot of heat. So if you do use a 2 tube system, the
addition of an HRV at the outside could save you a lot of heat. Theyre
quite cheap too.
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