Secondary Burn Tube

California, United States   


Thanx for your article about the anatomy of the woodstove.

I have a question about the secondary burn tube. Mine kept popping off and I finally fixed it but was wondering if the direction of the holes matters?

I had them point forward, towards the opening and it seemed to blow a lot of smoke out when I opened the door to add wood. I flipped it this morning to point towards the back but have yet to light a fire to see the difference. Is there a nominal position for those holes?




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by ChimneyChick | December 11, 2015 ChimneyChick's avatar
Midland, Ontario

The position of the Secondary Burn Tubes will change slightly from manufacturer to manufacturer. I would suggest forward direction as they also work as an air-wash for the window BUT look into your manual for the exact placements of the tubes.
If you can provide me   .(JavaScript must be enabled to view this email address)  the make and model of your stove I can look it up myself if I have an available manual.

by ICC Industrial Chimney Co. | December 11, 2015
St. Jerome, Quebec

The reply from AIM Chimney is correct.  Secondary Burn Tubes can point in virtually any direction.  You’ll want to make sure that the tube is pointing in the direction intended by the manufacturer.  You might be able to tell the original direction by looking for markings or screw holes on the interior of your firebox.

However, you should likely avoid pointing the secondary burn tube holes directly at the glass for two reasons. First, if your wood stove already has an air wash, then the air from the tube would interfere with it. Second, the air from the burn tube can push fine soot against the glass at high velocity.  Over the course of years, it can actually sandblast the glass so that it becomes permanently foggy.

Like AIM, I recommend contacting the manufacturer or looking in your manual.

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