Ceramic heating elements can withstand higher operating temperatures than aluminum heating elements while not outgassing toxins or foul odors in the inhaled vapor. Aluminum heating elements in contact with debris during exposure to air will start to oxidize and corrode. Ceramic is resistent to oxidation from airborne particles. Over time aluminum heating elements will also have a higher failure rate than ceramic counterparts. Aluminum has a boiling point temperature of 627* while ceramic can withstand 3000* before reaching its boiling point. An example would be smoking from a aluminum pipe which leaves a harsh vapor in the smoke, and smoking with a tobacco pipe. The difference is night and day in flavor. The flavor will be more pronounced being free of foul odors. Imagine pure potent vapors free of toxins.