shilo kinarty wrote:yes/
but you can more easily do a bigger barrel.
bigger how?
taller, which would affect the gap at the top of the riser?
or wider? which would affect the csa of the exhaust part of the barrel (the outer downdraft part) - assuming the heat riser stays the same diameter.
I'm guessing you mean surface area of the barrel - so either? - in which case it won't work for me as I only have a limited area in which to build the heater part. ie, an area 44in tall x 38in x 36in