i am installing a whole house fan and want have a countdown timer installed with it. At a previous home we had a manual switch wired to a timer like pictured. So i can press 30 minutes or 60 minutes and the fan will turn off at the end of the time.
Are there any smart switches that can accomplish this, that i can turn on the timer from an app. I dont need any other functionality like scheduling or anything like that. Just a countdown timer.