Not sure how many CFM ? Not indicated anywhere on the unit or package, and that is the reason for a 4 rating. It looks very nice and ended up being quiet, but it took some figuring out. If the grated are not properly secure its very noisy. After they were in place with no room to rattle, the fan started to run quietly. Much quieter than my previous one that cost four times much. I decided to get a new one because the manual switch broke, and when i looked up the part to purchase, it was more expensive that the this new unit. The military time does not bother me at all. I find it very "tres chic"