My oil fired boiler is mounted in a cupboard, within a WC, within a utility room (see diagram below). The cupboard is vented via louvre doors, plus a 50mm x 150mm grille to the underfloor area. The utility room also has a 200mm x 200mm vent, behind a fridge.
I would like to use the excess heat from boiler cupboard to provide some background heating to the conservatory alongside.
Is it safe to simply use a extractor fan near the ceiling, or can anyone suggest an alternative?
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