In general,
Vape Coils
, aka Heating Chambers are where the herb, wax or oils are loaded. To
be more specific, Dry herb vaporizers just have a heating chamber with
no exposed coil. Wax pens on the other hand have smaller chambers with
exposed coils that heat the wax directly. Convection Herb heating chambers
for don't get replaced, but wax coils, oil tanks, and combustion herb chambers
will have to be replaced periodically.