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Shower Extractor Fan
(self.homeassistant)
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
I'm using aqara temp/humidity sensors throughout the house. I'm not sure what the fan is, it's just a standard exhaust fan, but its controlled with a Kasa smart switch.