The Wyze thermostat doesn’t seem to be able to run the fan for a specific period of time. Our options are Auto (assuming this means it’s run at Wyze’s discretion) or Cycle (preset number of minutes per hour).
Auto will energize the fan ONLY when there is a call for Heat or A/C. Cycle (Circulate) will run default for 21 minutes every hour (this can be changed in Advanced Settings).
Unless I’m misunderstanding what you’re asking, you can specify the amount of time per hour if set to “Cycle”. For example, I have mine set to run 10 minutes per hour
Ah, now I understand. You want just a one time countdown timer for the fan, but not every hour.
You could sort of do that by setting the time per hour in the cycle function, say 15 minutes, but leaving it set to Auto until you want that 15 minutes to run in which case you would turn on cycle mode. The drawback to that is you have to remember to turn it back to auto sometime after it stops or it will run again next hour. Worse case if you forget is it would re-run your set time each hour until you remember to switch it back to auto. Certainly not what your looking for, but a workaround until they possibly add the function you’re hoping for.