"F" wrote in message
...
On 03/06/2007 19:07 Andrew Gabriel wrote:

Have you got a sub floor space you could vent it to?

It's sitting on a concrete slab.
What does the fireplace back onto?

Another room.

Looks like I'm stuck with a vent. Is there a minimum size?


You mean available sizes or regs?

Anything will drastically improve things.
To a certain extent it won't matter much, small vents will have a faster
flow and make up for their smaller size - to a certain extent! So long as
there is flow top to bottom I doubt you will have a problem - you would
probably get away with as little as 25cm² You can get proprietory brass
grilles at that size - 5x5cm.

--
Mike W