... heating, air heating, heating a surfaceCeramic shellCeramic shell, with wire and ceramic insulationLow cost, small bulk, insulating shellNot ... very small bulk, low powerPlastic shellPlastic shell, with wire and plastic insulationLow cost, small bulk, insulating shellNot ... of PTC, air heater, hair straightener, hair curler, drink warmer, water heater, vapor generater, read other pages in ...