I thought metal elemnts were suppose to give off toxins once over a certain temp. I know the steel element in my now dead vapor daddy use to glow red hot and I imagine it was 2 or 3 times hotter than the air that was getting drawn over the herb. But the element use to keep a real constant temp and never burnt the product and heated up real fast. So far my limited experience with a ceramic heating rod is that they take a while to get up to temp and have a tendency to burn the product coz they get so hot. I'm still waiting for my replacement unit so I'm limited to the VG. I am looking forward to learning my new vap when it arrives and getting the ceramic heating rod temp sussed.