... No flames, fumes or deadly monoxides. Our unique PTC design generates SAFE heat, with NO possible fire ... when it's running full time(4)Durable PTC heating element: 80,000 hours long-life heating ... . Unlike units with fragile glass lamps, our PTC elements will not be broken during shipping or normal ... No flames, fumes or deadly monoxides. Our unique PTC design generates SAFE heat, with NO possible fire ...