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Shower Extractor Fan
(lemdro.id)
Home Assistant is open source home automation that puts local control and privacy first. Powered by a worldwide community of tinkerers and DIY enthusiasts. Perfect to run on a Raspberry Pi or a local server. Available for free at home-assistant.io
Rather than activate the fan over an absolute humidity threshold with occupancy, I’d recommend setting the fan to turn on when the room’s humidity is a certain amount more than the ‘normal’ humidity and ignore presence.