Document ye7G65aooN437gBzDkjQOLZ2

American Society of Heating and Ventilating Engineers Guide, 1926-27 to a room whose heat loss is 9000 B.t.u. or above. (See Figs. 51 and 52 which show that high temperatures are necessary if rooms of more than 9000 B.t.u. requirement are heated by stacks in 4 in. studding), should be run within 6 in. studded walls or should have multiple stacks. Stack 12 American Society of Heating and Ventilating Engineers Guide, 1926-27 WARM-AIR REGISTERS The registers used for discharging warm-air into the rooms should have free or net area not less than the area of the leader in the Same run of piping. The free area should be at least 70 per cent of the gross area X Id Q < td Uz XH DO X >< i )i Xob. o Id Cd .w(ux< oz H < X(d o sections, wherever possible, should be changed from the thin rectangular to the more nearly square shape. Stack heads should have upper end curved to provide easy flow of warm air to the room. Splitters in the upper end of the duct increase the air discharge. 148 * 1 4