I live in a bi-level house where there is only 1 zone of heating and cooling.  Upstairs is always 5-7 degrees warmer than downstairs; winter spring summer fall.  Doesn't matter.  Didn't want a window unit and a mini-split was several thousands installed so I looked into this.   This unit is just to augment my upstairs so I can keep my thermostat set at 72-73 and not freeze to death when I'm downstairs.  So far I am pleased.  Quiet operation and decent cooling output.  I would receommend this unit over the 6000 BTU one which is much louder