Abstract: A waterless vaporizer has a casing containing a heating module that causes vapors to be emitted from a refill pad that is impregnated with menthol and eucalyptus oil by slightly heating the pad and producing a thermally induced convective air flow through the pad. A top member of a casing has a planar pad-receiving surface with holes in it on which the pad can be placed in any selected position between a "low" output and a "high" output position on the surface. A pivotable and vertically displaceable chimney member fits over the pad. The chimney member has a pad retainer/holder portion, the top wall of which provides an alternative position for the pad. A power switch and an indicator lamp facilitate use of the vaporizer. All electrical components are highly durable and fully insulated. The vaporizer is assembled without any screws or equivalent fasteners.