Aloha from hawaii,
I'm about to redo my Hell’s forge 8” square tube forge. im going for more efficient and hotter temps. it came with 1”wool. i’ve worked that lining pretty hard and recoated with refractory many times. its old and tired now so... my question is if i put 2” of wool on the sides and 3”on top 2”on the bottom i get something like 3.5* 3 inches hole size, will that mess up my forge heat in any way? i’ve seen mini forges with small chambers, but would a 3*3.5*18” chamber be a bad size? thanks very much, i tried to search for similar questions, sorry if this is a repeat