"He who marches out of step hears another drum." ~ Ken Kesey
Nice thing about my M&R dryers. You shut them off. They cut the burner, and then blower runs until the temp is 150. Never a worry.
I have an Economax II. When I hit the stop button it turns off the panels while the belt continues to run. When it cools to 300, it shuts down completely. I have never had to replace a belt, but I imagine they are expensive. It takes about 12 minutes from the time I hit stop till it turns off. Yep, fans help.