Well, not strictly true. The old chimney that goes downstairs to the
original "airing cupboard/boiler room" Redundant due to combi on outside
wall.

Cupboard is to house manifold for upstairs (living area / kitchen etc)
UFH, but due to having very low ventilation in the downstairs
bedrooms/bathroom as half is built into the hill (Windows only on one
side of house) I was wondering if there would be a worthwhile case for
some form of low speed extraction or induction fan over the original
hole in the chimney (Flue) which is about 12" square?

Being in the cupboard I thought it could provide fresh air into the
house even slightly warmed due to the heating components housed therein.

Any thoughts appreciated.
Ta.

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