Chimney height to improve draft

I did some calculations .My findings were to get a good draft 15 pa with a outdoor temperature 32 c or 90 f .The chimney would need to be two meters or about 6 Ft. tall . Any thoughts on this ?

Hi John, and welcome to the BrickWood forum.

I’d love to hear a little more about your calculations. How did you arrive at your findings?

(And just so you’re at ease in sharing about this, I’m not a oven designer. I’m genuinely curious.)