This is a compact unit that is very good at cooling our garage.  It keeps the temps at the preselected level and is really quiet.  I would have liked to see a better description on this item.  Example  When in cool mode does this unit need to drained to the outside.  It does not.  It was easy to install except for the hose to the window slider.  That was a little tricky for me because I am not strong, but did it and it is more secure than the unit we had previously.