Design
The height of the stove was about 30 inches tall with a box shape. The front side was open, except for a decorative panel in the upper part of the box. The back of the box was to be placed a few inches away from the flue, or chimney. On the bottom panel there were several holes to allow the smoke to escape; these were connected to the chimney. These panels were bolted together with iron screws through pre-cast ears. Inside there was a small thin rectangle prism that would force the smoke into the holes. The plates were all made from iron.
Franklin's stove sold poorly. The problem lay with the inverted siphon: the smoke had to pass through a cold flue (which was set in the floor) before the smoke could enter the chimney; consequently, the smoke cooled too much and the stove did not have a good draft. The inverted siphon would operate properly only if the fire burned constantly so that the temperature in the flue was high enough to produce a draft.
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