I'm living in an apartment with a Chinese roommate during the school months. During the summer he tried turning on what I think is called the house fan. You know that thing on the thermostat that says "Auto" and "Fan on". I looked it up and I read that running the house fan with the AC wastes money. He just wanted to move the air around so I told him to open a window. Now it is the summer and besides smothering me with 78 degree heat he also turns on the house fan. I'm upset enough that the apartment is 78 degrees but the fan is driving me up the wall. Does anyone know where that fan is pulling air from? Because I thought it was pulling it from outside which would mean he has the heat set super high and pulling in the cold winter air. Am I right? Let me know your thoughts please so I know what I'm talking about when I confront him soon.