Anyone here have a canny cowl that will stop back draughts into my bathroom extractors.
The fans are really very effective, super quiet and actually have a built-in anti-draught device which is adequate most of the time. But when the wind is up - I live by the sea, so this is is often enough - the antidraught device rattles really noisily.
The fans vent vertically through to a pitched slate roof and are capped with what looks like a traditional grey plastic dome.
Chimney cowls seem to have a range of solutions for draughts, but is anything available for 100mm vents?
Or what keywords I might use to discover a suitable product?
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