This is a compact unit that pushes a lot of cold air. The fan is strong and the air quality is cold at 61 degrees. It has duck work or a tube to attach to the back of the unit and it needs to have a vault, ventilator, or just access outdoors for heat to go. The fan is either high or low, it has a sleep setting, and a timer if you would like. This level BTU is idea for a closed average size room but not a master bedroom or classroom.