While refurbing a bedroom I'm taking the opportunity to fit a vent in the bricked-up fireplace. How big should this be? I was thinking of a half-brick size, covered with one of those white plastic brick vents. Adequate? (the horrible way the bricking up seems to have done makes a full-brick size a bit awkward)
Thanks David
Why not fit it outside then your room will be warmer.
-- Mike W
You mean in the back of the chimney breast? Considered that, but decided the neighbours might be a bit pissed off (we live in a semi...)
David
Ah, so do I but chimneys on the other side :-)
-- Mike W
I've found the draw on a chimney is so huge just about any size will do.
-- Mike W
I suspect it's not so critical for a chimney which is not on an outside wall. Chimneys on outside walls are much more of an issue. I used a full air brick at the bottom and half a brick cut out of the flue into the loft, and that has kept a chimney on an outside wall dry, which was wringing wet before it had full ventilation (originally had just half an air brick at the bottom only, and capped/sealed at the top).
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