The heat exchanger is nothing more than a pipe with a small opening at one end and a larger opening at the.
													
																	Diy wood fireplace heat exchanger. 
									
	
		
	
																	Begin by bending each of the pipes into equal size c shapes. 
																	Requires welding to assemble. 
																	K16gr diy fireplace heat exchanger kit. 
																	Purchase comes with unassembled parts shown and assembly video 16 wide 16 tall not including the 3 adjustable legs 16 deep bottom 13 deep top when fully assembled you can use a cardboard box of this size to test the fit. 
															
													
									
	
		
	
																	You can get this at almost. 
																	Now we will create a box that will take the air from the fan which is normally a rectangle. 
																	Build your own fireplace grate with our do it yourself kit. 
																	I used 2 5 inch diameter pipe that was 6feet long from advanced auto parts. 
															
													
									
	
		
	
																	Allow a longer section on the bottom of. 
																	Wire up and. 
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