A:Answer Checking my app. There is a fan setting - On, Auto, Circulate. On - fan is always on, Auto - fan is on when heating or cooling is on, Circulate - fan runs randomly about 35% of the time. That's what the app says. I have not tried it so I can't verify it works as described. BTW, I recommend this product . It easily interacts with Alexa which is why I bought it and the iPhone app is easy to use.