Using a Shelly to control an Extractor Fan : r/homeautomation
Kair Smart 100mm Intelligent Bathroom & Kitchen Extract Fan
GreenSun Wireless Extractor Control with Window Magnetic Contact and Radio Socket for Cooker Hood Fi Window Switch Wireless Window Contact Switch : Amazon.co.uk: DIY & Tools
Kair Smart 100mm Intelligent Bathroom & Kitchen Extract Fan
Silent Bathroom Extractor Fan Quiet Humidity Condensation Sensing with Intelligent WiFi