this part was their answer
It is not correct. When controller want to reduce the heat, it is better to have a 0 output. The larger the daynamic of the change, the easier it can cable. The smoke generator can rise the conbinate temperatre by 40 F. It become more difficult for low temperature control when smoke generator is on. Also, if you want it to be on all the time, just plug the generator directly to the wall outlet.