Document L9LOzJmw12k6VpnDbBJbbdQd

American Society of Heating and Ventilating Engineers Guide, 1928 to a room whose heat loss is 9000 B.t.u. or above (See Figs. 4 and 5 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 OWS Q <WJ uzas OS < > ou & b) zV < US X rp O U-i 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. 202