If you have the room to fit it, an EB Pabst brand German fan stays silent even when the blades get gunked up. Bearings in this fan are huge. I also agree with Landyacht's choice of fan.
Older big rigs used to come with encased in wire fans that vibrate so bad they would snap rivets on a Peterbuilt cab. Squirrel cage fans are not easy to clean. And they are death with small motors and bushings instead of ball bearings.
Anything greater than 150 CFM (more or less) may disturb flame pattern on stove top burners.