... Heating 2.Safe Heating 3.Silent heating 4.Durable PTC heating element. PTC infrared multifunction heaters SMT-06 Features:• Even Heating: ... Safe Heating: No flames, fumes or deadly monoxides. Our unique PTC design generates SAFE heat, with NO possible fire hazard. It ... the heating element. Unlike units with fragile glass lamps, our PTC elements will not be broken during shipping or normal operation ...