DESCRIPTION: The chulha is suitable for cooking food for a family of 3 to 5 persons. The chulha is suitable for burning wood (3 to 5 cm dia and 15 to 40 cm long), dung cakes and crop residues (including: wheat stalk, cotton-stalk, corn cobs, etc.)
MATERIALS: i) Soft lateritic mud or sandy clay without any pebbles or stones, ii) Pottery lining and tunnel made of clay, iii) Chimney pipe (7.5 cm inside dial made of asbestos cement pipe.
CONSTRUCTION: Take 4 buckets of mud (15 Litres capacity) and mix it with 1 bucket (15 litres capacity) of wheat or paddy straw and add water. Knead the mixture to stiff consistency. Allow the mixture, to stay overnight for construction of chulha platform. Locate the position of chimney pipe hole in the roof where the chulha is intended to be installed. From the centre point of the proposed hole in the roof find the location of chimney pipe hole at the bottom of the kitchen by using a plumb line. Draw the outer dimensions of the platform (44 x 50 cm) by appropriately locating the chimney pipe. Mark the position of the pot hole using a chalk or marker. Locate the pottery liner, tunnels and chimney pipe on the marked platform. Add clay mixture/prepared-mud to fix the respective position of the liner and tunnels. Carve out ash-removal, opening and soot-removal opening. Fix pottery or mild steel fabricated grate in the first pot hole at bottom. The tunnels are made of asbestos cement pipe or pottery. Make a hole (12 cm dial in the roofing and take out the chimney pipe. Allow the chulha to completely dry (3 to 5 days) before use.
SOURCE: Centre For Rural Development And Technology, I.I.T. Hauz Khas, New Delhi - 110 016