I have seen the discussion of Thermal Shock to the stove from engaging the Catalysts before the stove has warmed up. That makes sense. But I have been wondering about the non cat stoves. I have no experience with them but if I am correct, once you get the wood burning you close the dampers, etc and it increases in heat untill the secondary burnoff begins. Does this prevent the possibility of Thermal shock occuring? Also do I have a proper understanding of Non cat stoves. is there more involved in their operation?