When it fully blasts its a little noisy, but it really cools down our large bedroom.  I'm not a big fan of air-conditioning but it's been a necessity this summer. Watch the ratings on these things because I don't know iff they conform to government standards, but it cools in the very warm and dry environment in Central Oregon, where we spend our summers. I would say that it was a good decision to go with the 14,000 BTU, (actually 7700 by another standard) for our place.