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Also know as Convection Box, Ventilation Apparatus. For demonstrating the phenomenon of convection in air and the principle of room ventilation. Consists of an enameled metal box (l x w x h), 8"x4"x4" (200x100x100mm), having a sliding glass door and two glass chimneys. When the included tea light candle is placed under one chimney and a smoldering tape or parchment paper is placed underneath the other chimney, the flow pattern of smoke dramatically illustrates the formation of convection currents. Tape or parchment paper are not supplied. Comes with two candles, Teacher Guide and reproducible Student Handout.