. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. hung from the overhead floor con-struction. If this consists of wood, lag screws are used for attach-ing the hangers to the joist above. If the building is of fireproofconstruction the rods are either clamped to the lower flanges ofthe floor beams or extend into the masonry where they are pro-vided with metal plates or large washers. The lower endsof the hangers are made in the form of a hook or eye andan iron bar or piece of pipe run through for supporting theheater. 112 HEATING
. Power, heating and ventilation ... a treatise for designing and constructing engineers, architects and students. hung from the overhead floor con-struction. If this consists of wood, lag screws are used for attach-ing the hangers to the joist above. If the building is of fireproofconstruction the rods are either clamped to the lower flanges ofthe floor beams or extend into the masonry where they are pro-vided with metal plates or large washers. The lower endsof the hangers are made in the form of a hook or eye andan iron bar or piece of pipe run through for supporting theheater. 112 HEATING AND VENTILATING PLANTS Arrangement of Heater.—Fig. 74 shows a section through astack and galvanized iron casing arranged for introducing warmair into a room through a floor register. The cold-air chamberis seen at the bottom of the casing, and the air in passing through FLOOR J^EGISTER GALVANIZED IRON CASING Fig. 74. Anangement of Heater. the spaces between the sections becomes heated and rises throughthe register to the room above. With this arrangement there is no way of regulating the tem- FLOOR REGISTER. GALVANIZED IRON SUDINGCASING DOOR Fig. 75. Heater with Mixing Damper for Regulating Air Temperature. perature of the room except by closing or partially closing theregister and thus shutting off the air supply. Where indirect stacks are used in dwelling houses and similarwork, the height of the warm-air space above the sectionsshould be made at least 8 inches, while 10 or li^ inches is betterfor stacks of large size. The cold-air space is commonly made alittle less, but if there is ample room it is well to make it thesame. In schoolhouses and churches, where larger volumes of air must INDIRECT STEAM HEATING 113 pass through the heaters, these spaces should be based upon thevelocity of flow as described later. Mixing Dampers,—Fig. 75 shows a heater equipped with amixing damper for regulating the temperature of the air enter-ing the room without diminishing the volume to
Size: 2875px × 870px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectventilation, bookyear
