On Mon, 22 Dec 2008 00:10:05 +0000, Tim S wrote:

Ed Sirett coughed up some electrons that declared:

On Sun, 21 Dec 2008 19:30:41 +0000, Tim S wrote:

Dave Plowman (News) coughed up some electrons that declared:



But I'm probably talking ********. I haven't made a concerted effort
to calculate the ventilation requirements of the various things yet so
this will come out in the wash when I do the research properly

The (flueless) gas cooker only requires that there is some sort of
opening direct to outside air. (e.g. openable window). The log burner
does not come under BS 5440 but it would be a good idea to make sure
that it has enough air.

I would suggest (unless some normative document states otherwise) that
a permanent vent to outside air of at least 50cm² should do the trick.



Excellent - thanks Ed.

I have a vent in the room already (put there for the current gas
fire/back boiler).

I'll clean it and measure it, but it looks superficially like it's
=50cm2.

I'll have to be a bit careful because there'll be a cooker hood with
exhaust to outside going in too and I'm aware this may load the vent
(reduce its effective capacity) - I'll be sure to check on that too.

Although the wood burning stove does not come under BS5440 you would do
well to treat it as if it did, unless there are regs or instructions that
state things more accurately.

In BS5440-1 (open) flues must still work even when extraction devices in
the room and adjacent rooms are set to their maximum settings. You may
find that you then need a bigger vent to get things working OK.
You would discover this when the warmed flue fails a smoke test but passes
when you open the window.

--
Ed Sirett - Property maintainer and registered gas fitter.
The FAQ for uk.diy is at http://www.diyfaq.org.uk
Gas fitting FAQ http://www.makewrite.demon.co.uk/GasFitting.html
Sealed CH FAQ http://www.makewrite.demon.co.uk/SealedCH.html
Choosing a Boiler FAQ http://www.makewrite.demon.co.uk/BoilerChoice.html