- Dec 4, 2012
 
- 5
 
- 10
 
Here's my first reverse flow build. My cooking chamber is a old expansion tank that's 36" x 84". I've got a 30"x 40" fire box. Since this was a expansion tank it has a flange on the top or front now. My question is has anyone had the need for extra fresh air after the firebox? Thanks Tom 
	
		
			
		
		
	
				
			
				
		
										