Vaporization occurs through a process that takes advantage of the physical properties of the nicotine resins. These resins turn into a vapor around 380 degrees F. and the material does not start to combust until well above that, say around 450 degrees F. or so. The material is heated until the nicotine resins volatize into a thin, cool, clear oil vapor mist.
This bypasses the combustion process, leaves out all the side products and side gases of an actual self-sustaining fire. Heavy debris like ash, and obvious toxic gases like CO2 and carbon monoxide as well as several other highly noxious gases. Naturally the oil vapor is much cleaner, cooler and less irritating than the much hotter smoke, providing a more flavorful taste. Studies indicate that about 20% - 40% of nicotine is destroyed or flash-fried by hot gas lighters, leaving the transfer rate of actual nicotine in vaporizers higher than other devices of intake such as a tobacco pipe. Consequently, it is not only better for your health, but also a more efficient way to enjoy fine tobacco.