Cyclopedia of heating, plumbing and sanitation; a complete reference work . < a: 05 ou. 05 -u -J ooq 5 < T T. >« z < a. Sou 05 o 5 2 o **05« s< 3} EC o C4 fat HEATING AM) VENTILATION 33 space between them on both sides covered with tin, asbestos, or wirelath. Table IX gives the capacity of oval pipes. A (i-inch pipe ovaledto 5 means that a (i-inch pipe has been flattened out to a thickness of5 inches, and column 2 gives the resulting area. Having determined the size of round pipe required, an equiva-lent oval pipe can be selected from the table to suit the space available. Regis
Cyclopedia of heating, plumbing and sanitation; a complete reference work . < a: 05 ou. 05 -u -J ooq 5 < T T. >« z < a. Sou 05 o 5 2 o **05« s< 3} EC o C4 fat HEATING AM) VENTILATION 33 space between them on both sides covered with tin, asbestos, or wirelath. Table IX gives the capacity of oval pipes. A (i-inch pipe ovaledto 5 means that a (i-inch pipe has been flattened out to a thickness of5 inches, and column 2 gives the resulting area. Having determined the size of round pipe required, an equiva-lent oval pipe can be selected from the table to suit the space available. Registers. The registers which control the supply of warmair to the rooms, generally have a net area equal to two-thirds of theirgross area. The net area should be from 10 to 20 per cent greaterthan the area of the pipe connected with it. It is common practiceto use registers having the short dimensions equal to, and the longdimensions about one-half greater than, the diameter of the would give standard sizes for different diameters of pipe, aslisted in Table X. TABLE XSizes of Registers for Different S
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