End of tether........

[John D v2.0]

Occupied heated homes don't smell mouldy.

99% of the time the smell emanates from waste pipes. Washing machines and syphoned waste traps are the biggest culprits, especially if the smell is strong and constant. It's usually too easy to overcome the smell of mould with simple occupation habits. Not so easy to rid the smell given off by dodgy wastes.

True but that wouldn't make the ops clothes smell foisty!
Our old kitchen smelt mouldy even though it was occupied and heated, that was high humidity in an old solid brick room with insufficient ventilation. Now it is a utility room with mvhr, floor insulation and no specific heating apart from exposed pipework and it's dry and fresh now.