I did use feldons as a rough estimate. I think I ended up with about 100sq in for the opening. 24x24x24 firebox.Looks good! I'm finally picking up a 125 gal vertical propane tank today. What size did you make you FB/CC opening? Did you use feldons calculator for this build?
I’m a newbie at this but have been reading everything I can here before starting my own build, but hoping I can help anyway. Your fab work and welding looks awesome too, you did a beautiful job!OK guys, I got this thing all finished up and have been using it every chance I get. But, I have concerns. I'm not sure if it's a draw issue or a poor door location but, whenever I have the firebox door open more than a couple inches, which if we're being honest is only when I am tending to the fire. I get smoke billowing out the door. I also have a temp difference of 40* across the grate, obviously higher on the fireside. It is a 120 gallon, reverse flow, non-insulated, firebox is 150% over-sized according to Feldons, 110cu in throat, 110cu in under rf plate, 110+cu in rf plate opening, 6"x44" stack. Lastly, I swapped out the firebox grate for a sheet of 1/2" plate because my coals were falling through the openings. Mind you, everything is welded into place now so there is very little I can easily change but just to know for nest time would be great.
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