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Heating, Lighting, and Refrigeration: Smoke

Chimneys - To Prevent Smoke. - Build a long, narrow flue 4 or 5 inches deep and 15 to 18 inches wide, thus having an opening of 60 to 90 square inches. Let the flue open into an air chamber in the chimney of twice its size, i. e., an area of 120 to 180 square inches or 11 to 16 inches square, but this may be reduced toward the top of the chimney if desired. Carry the chimney as high above the roof as good taste will permit, and let the flue approach the chimney at an angle, or, if possible, by a number of turns.