One feature pertains to a handheld vaporization apparatus that includes a heating element and a housing that encases the heating element. The housing includes a first end having an opening that allows heated air provided by the heating element to exit out through the first end. The housing further includes one or more air ducts on an outer surface of the housing, where the one or more air ducts allow ambient air outside the housing to enter into the housing and flow past the heating element so as to be heated by the heating element. In one example, the housing's first end has a semi-ovoid shape that presses against and seals a hemispherical-shaped bowl. In another example, the housing's first end includes an elastic ring that surrounds the opening and presses against the inner surface of the bowl to create a substantially airtight seal.