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Topic
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Does ventilation of an internal bathroom need to be 24/7?
Multi-level strata, nearly 100 units, internal bathrooms – building manager claims nothing in the building code requires 24/7 ventilation. There is no link to light switch. The extractor fan ventilation is currently not operational over night time (about 10pm to 6am).
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Depends on the building type. Ours have negative pressure ventilation with optional switched fan to assist it. We find the negative pressure works well so have disconnected the fan.
I am in a townhouse with an entirely internal bathroom. We have a conventional extractor fan that does not prevent mirror fogging and general dampness.
We have stopped using the extractor fan in favour of running a portable desiccant dehumidifier just while showering and drying off. This is far more effective – no more mirror fogging and much less overnight condensation on windows elsewhere in our unit. It consumes about 730W, which, in a small room, is enough to also be useful warming in a Canberra winter. Without the fan running, that heat stays in the room.