While some have not had the luck of a 5K unit doing it's job, you will find brands do make a difference.Some brands just do not blow cold air and some do, just like some auto AC's blow super cold air and others not so much.
Mine is a Perfect Aire® 5,000 BTU Window AC/Model Number: 3PNC5000 and it blows really cold air not just semi cold.Bought at my local Ace store originally for my 30ft trailer in the bedroom, in which it did a great job.
Draw is 4.8 amps max, so my Honda 2K really likes it without the loud surges.
As to the opp and the question,I would not do it that way as it does throw alot of hot air out the back of the AC unit.They are so light I see no need to permanently mount mine and I only take it as needed.The 10" O2 fans do a bang up job into the lower 80's in keeping a person cooled down.Above 80-85 I throw in the AC but it does really cool down in the hills around here at night.I have seen 95 in the day and 30's at night.That makes a difference in AC needs.
