Beat the rush and save big, I have an excellent vertical airconditioner that I do not use as I prefer window fans. The unit used to belong to my roommate but he died last year and I have no use for it. I don't know the BTUs, but he had it in the living/dining room and it works great, has four speeds and although it's a bit noisy on the highest one, at least for me, it can freeze the brass monkey real fine.
Comes with a mounting bracket so no worries.