Need to be to start to go on fire or cause a problem? I really fired up my insert as I am still learning the ins and outs of it, what it is capable of doing and what it is not. Using my ir thermometer, I took temps of 133 degree on a small part of a tv cabinet and 150 degrees on a small part of wood flooring nearest my insert. So what would be the degree that you really need to be concerned about something dangerous happening?....