I made a cold smoker out of 2 attached webber grills, but these are not NSF or UL, and I am not clear whether they will be approved by my local health board for commercial food establishment use. I want to do this outdoors, with live wood fire. Does anyone know of a setup that would be NSF or UL (and not cost $10k)? Or of the parts that I could use that might be certified that I could put together? I am doing low temp cold smoking - below 80 degrees. Thank you!!