Hot-air Fur′nace.
One in which air is heated for warming houses, or for purposes of drying, usually the former. The arrangements are various, but a common kind is a form of stove in a brick chamber, the air coursing around the stove and among certain pipes and chambers in which circulate the volatile products of combustion. In the example (Fig. 2586) the furnace, with the exception of its face-plate, is inclosed in an air-chamber. The caloric current passes from the furnace A around through D E, into the auxiliary radiator G, down by the V-shaped driving flues I K L, and so to the exit. The air circulates around each of the flues in chamber F, and against the plates of the furnace. In Fig. 2587, a series of concentric annular airflues are placed above the combustion-chamber and communicate with the external atmosphere through pipes extending into each flue near its bottom. The external jacket of the furnace is filled with coalashes. A water-pan above the fire-pot is fed from an external communicating vessel. |
| Hot-air furnace. |
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| Hot-air furnace. |
