Voltex - In-wall Delay-OFF Timer. 5m, 15m, 30m time delay. Controls a fan or a lighting load.
Manrose FAN2444 Fully Adjustable Run-On Fan Timer MANFAN2444 | Electrical Direct Ltd | New Zealand
Bathroom Fan Delay-Off Timer Switch Socket 100W
DT100W | Broan-NuTone® Exhaust Vent Fan Delay-Off Wall Control/Timer, White
Exhaust Fan with Timer and Humidity Sensor - Hackster.io
SmartExhaust™ Toggle | AirCycler
Automatic Cut Off Timer Switch for Bathroom Lights, Exhaust Fan, Switch Off After 20 Minutes, for Garage, Closet, Balcony : Amazon.in: Home Improvement
Ac100v-220v Adjustable Timer Control Relay Module Turn Off Delay Switch Board For Exhaust Fan Mr22 19 Dropship - Relays - AliExpress
Installing delay-off relay on exhaust fan : r/lasercutting