| 
	
		
		
		
		 I'm no expert but a buddy of mine just did this. He bought a register with a fan in it....that is safety CODE. Has some sort of safety feature that will shut the register if there is a fire. I think it was relatively cheap in price as well....like less than $200. He swears by it and wishes he had done it sooner. It's not huge either....fits in between the rafters and needed to be hard wired....maybe 3 or 4 inches in width. 
		
		
		
		
		
	 |