I've been looking at some of the other builds in posts, and I have a question about using electric elements and digital PID's for control. Some of the builds also have a high temp air circulating fan that blows air across the electric heating element. Usually these are the finned elements. The webpages I've looked at where the elements are being sold do not mention constant airflow. Is this something that must be done to keep the element from burning out or is there some advantage in temp stability throughout the cabinet?