Thanks for the details Boomer. Looks like the top of your throat is about 3” or so above grate level. Mine is right at grate level. I suspect that is a contributing factor. I would guess the heat would leave the FB through the throat at the top and travel over the top of the baffle instead of being redirected upwards sharply to accelerate convection. Just guessing but plan on testing.hogaboomer wrote:I think the firebox height difference may have made this not work for me. My firebox is a lot higher than Dave's.