Cyclopedia of heating, plumbing and sanitation; a complete reference work . r more registers may be connected with thesame heater if the horizontal runs of pipe are short. Fig. 50 showsa section through a heater arranged for introducing hot air into aroom through a floor register; and Fig. 51 shows the same type ofheater connected with a wall register. The cold-air box is seen atthe bottom of the casing; and the air, in passing through the spacesbetween the sections of the heater, becomes warmed, and rises to the rooms above. Different forms of indirect heaters are shown in Figs. 52 and 5,1. S
Cyclopedia of heating, plumbing and sanitation; a complete reference work . r more registers may be connected with thesame heater if the horizontal runs of pipe are short. Fig. 50 showsa section through a heater arranged for introducing hot air into aroom through a floor register; and Fig. 51 shows the same type ofheater connected with a wall register. The cold-air box is seen atthe bottom of the casing; and the air, in passing through the spacesbetween the sections of the heater, becomes warmed, and rises to the rooms above. Different forms of indirect heaters are shown in Figs. 52 and 5,1. Several sections con-nected in a single groupare called a stack. Some-times the stacks are en-cased in brickwork builtup from the basementfloor, instead of in gal-vanized iron as shown inthe cuts. This methodof heating provides freshair for ventilation, and forthis reason is especially adapted for schoolhouses, hospitals, churches, etc. As com-pared with furnace heating, it has the advantage of being lessaffected by outside wind-pressure, as long-runs oi horizontal pipe. Fie 50. Steam Heater Placed under Floor Ruta single fire. Another advan-is the large ratio betweenthe heating and grate surfaceas compared with a furnace;and as a result, a large quan-tity of air is warmed to a mod-erate temperature, in place ofi -mailer quantity heated to amuch high e r gives a more agreeablequality to the air, and rendersit less dry. 1 direct and indi-rect systems are often com-bined, thus providing the liv-ing rooms with ventilation, while the hallways, corridors, etc., haveonly direct radiators for warming. Types of Heaters. Various forms of indirect radiators are shownin Figs. 52, 53, 54, and .~>ti. A hot-water radiator may be used ;
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