How much air you talking of moving? 
 
If your talking to move the moisture evapourated would think you could get by with a reality low CFM. Just do what your thinking (vent hole opposite to let in the room air in) and could use a small in-line fan such Princess Auto carries to boost furnace ducts or fab something up with a small muffin fan. 
		
	
		
		
		
		
		
	
		
		
	
	
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