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okay I need a little help did it to smoke today and had a very difficult time getting things up to temperature I believe my opening for my reverse flow opposite the fire box is too small agree to disagree help also occasionally has smoke coming out the inlets and yes I made butterfly valves for the inlets
What did you use to calculate the FB to CC opening, opening at opposite end of FB, stack size and length ? Sounds like you are not getting enough heat and air flow into the CC.
I don't remember it this time I got it written somewhere but it appears as though my opening up to set the fire box is smaller than my opening between firebox and cooking chamber
You should have 40 square inches from the firebox to cook chamber, under the RF plate and at the end of the RF plate where turns to enter the grate area.
You should have 40 square inches from the firebox to cook chamber, under the RF plate and at the end of the RF plate where turns to enter the grate area.
And 40 sq. in. at the end of the RF plate.... and the exhaust stack should probably be 3" or 3 1/2"... I know 2 1/2 is what is calculated.... BUT due to the surface area per volume, the friction loss is extreme.... when stuff gets smaller, the surface area to volume doesn't compute for good air flow....
And the inlet to the CC should be around 10 sq. in. ... having it divided to an upper and lower is very good... make them larger to accommodate the butterfly valve causing a restriction, if need be...