With conduction vaporization, the herbal material makes direct contact with the heat source to produce the vapor. Earlier desktop vaporizers utilized this method, and it is no longer as common.
Most wax and pen-style vaporizers utilize this method of vaporization. As the plant material makes direct contact with the heating element, vapor is produced and then inhaled as the user draws through the mouthpiece. Although this method of vaporization results in a quicker heat-up time, it can also lead to combustion if not properly utilized.
With convection vaporization, the herbal material does not directly touch the heat source. Instead, vaporization is achieved by passing heated air over the material, extracting the active ingredients.
There are two basic types of convection vaporizers: whip-style and forced-air. Whip-Style vaporizers require the user to inhale through a tubing system (whip), thereby pulling hot air from the heat source over your material. Forced-Air vaporizers utilize a fan that propels the hot air over the material, thereby creating a stream of vapor that is then filled into a bag or balloon system.