How small are we talking? Mine is 62" tall and I have everything up top. I vent out the top, pretty simple. Tent is pretty cool, 75-80. People who run 4' tall tents will sometimes put the fan ontop.
Heat rises,exhaust on top. Imo if room is small your just going to heat the room until it matches your tent if you cant control temp in room.better to vent into diff room best to vent outside