DESCRIPTION: It is a cheap, durable and light weight model. The different parts of the choola viz., the two single ovens sewing as the two pot-seats, the chimney base, the links connecting them, the chimney pipes, the cowl pipes etc., are prepared separately over the potter's wheel (see illustration). Holes are provided on the side walls of the ovens to insert the link-pipes between one oven and another, and the third oven and the chimney pipe. They are then allowed to dry and then baked as earthen pots. The various parts are then assembled and each joint is plastered with mud.
ADVANTAGE: The advantage of this type of choola is that it is easily transportable and could be assembled in any convenient place. Wherever it is required as a permanent fixture, the various parts are assembled and plastered on all sides of the floor with clay.
Another important feature is the gradient provided in the flue passage between the two pot-seats. The passage connecting the first pot-seat and the second has a gradient upto the chimney base. By this design the choola has a better performance, fully utilizing the heat units and the smoke entering the chimney base has sufficient heat to raise it (against atmospheric pressure or wind currents) above the roof. There is no tendency to have a back-draft also by this arrangement. It has been found to be cheaper, handy and more purposeful, while maintaining its innate qualities of efficiency and durability.
SOURCE: Sri Muniandi, Gandhiniketan Ashram, Kalluppatti, Madurai Dist., Tamil Nadu