Quote Originally Posted by firebird77clone View Post
In theory, I you mount the fan as a pusher, in the clean air indeed, then you should be good. The fan motor could only cause ah ignition if it were placed in the outfeed air path.
Mounting the fan as a "pusher" creates some challenges with a large bank of inlet filters to keep the dust down without restricting flow. Not that it cannot be done, but exhausting the air is much more efficient, just like pulling air through a radiator works better than pushing.