I  would love to be positive about this little A/C unit, but unfortunately, it does not cool enough for my little shop.  I originally thought that according to the ratings on the reviews, I should have been able to use a 5,000 BTU unit, but wanting to be sure of the cooling I went with the 8,000 BTU Unit.  This unit does a really good job if you are standing directly in front of it but it does not want to cool my entire shop.  The bigger units are too large for my 3x3 windows so I guess I will just have to leave this unit running until it burns up from exhaustion.  Is it possible that you did the testing of these units somewhere nearer the North Pole?