[Wharf Rat]

You might also want to look at fans that are designed to mount on the wall and exhaust gas appliances such as water heaters. You aren't burning gas, of course, but it's set up to mount on the side wall.

You need to make sure that there is a source of fresh outside makeup air. If you exhaust without makeup air, you might lower the pressure in the basement. Then, if you have gas appliance or a fireplace, they won't draft right. That's potentially dangerous.