Spent all morning doing testing, time that I really need to be giving to needed chores and not watching every cycle of this thing.
At this point I have run it with the chimney cap in 4 different positions:
- 3/4" (where it was set from manufacturer and between the recommended 1/2" and 1")
- 1.25" (close to max)
- removed
- 3/8"
First I want to mention that the internal fan appears to be blowing constantly (it may vary, not sure) which I believe it is supposed to do. This produces positive pressure inside the unit such that any smoke and heat are exhausting out the chimney, door and grease trap. I only mention this since there seems to be a lot of focus on the chimney and I wanted to clarify it isn't the only source of exhaust. I don't care about escaping smoke myself, my opinion being there must be plenty inside for it to escaping.
Regardless, I collected each low and high point for 6 temp swings after giving the unit a couple runs to 'stabilize'
between chimney height changes. I've reviewed the data and it is still consistently exhibiting temp swings well outside of the manufacture specs and what most others seem to post who have actually watched theirs. Chimney changes had negligible effect.
Low side averages 24 degrees below the set 225 temp. It was only within 15 degrees 25% of the time.
High side averages 50 degrees over the set 225 temp. It was never within 15 degrees, only once within 25.