File:Cyclopedia of heating, plumbing and sanitation; a complete reference work (1909) (14595662207).jpg

Identifier: cyclopediaofheat02ameruoft (find matches)
Title: Cyclopedia of heating, plumbing and sanitation; a complete reference work
Year: 1909 (1900s)
Authors: American School (Chicago, Ill.)
Subjects: Heating Plumbing Sanitation Ventilation
Publisher: Chicago American School of Correspondence
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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mputing pipe sizes. As the indirect heaters are placed in the basement, care must betaken that the bottom of the radiator does not come too near thewater-line of the boiler, or the condensation will not flow back prop-erly; this distance, under ordinary conditions, should not be less than2 feet. If much less than this, the pipes should be made extra large,so that there may be little or no drop in pressure between the boiler 100 IIEATIXG AND VENTILATION 91 TABLE XXVIndirect Radiating Surface Supplied by Pipes of Various Sizes SQfARE Feet of Indirect Radiation which will be Supplied with Sizi of Pipe \ Pound Drop in 200 Feet \ Pound Drop in 100 Feel \ Pound Drop in 100 Feet 1 in. 28 40 57 M 51 72 105 H • 67 95 170 2 185 262 375 2J 335 475 675 3 540 775 1. 105 3i 812 1, 160 1,645 4 1, 140 1,625 2, 310 5 2, 030 2, 900 1, 110 6 3, 260 1. 660 (i. 600 7 4, 830 (;. 900 9, 810 8 6,800 9,720 13,860 and the heater. A drop in pressure of 1 pound would raise thewater-line at the heater 2.4 feet.
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Pig. 76. General Form of Direct-Indirect Fig. 77. Section through Radiator ShownRadiator. in Fig. 76. Direct=Indirect Radiators. A direct-indirect radiator is similarin form to a direct radiator, and is placed in a room in the same 101 92 HEATING AND VENTILATION manner. Fig. 76 shows the general form of this type of radiator;and Fig. 77 shows a section through the same. The shape of thesections is such, that when iii place, small Hues are formed betweenthem. Air is admitted through an opening in the outside wall; and,in passing upward through these Hues, becomes heated before enter-ing the r< i. A switch-damper is placed in the duct at the base of the radiator, so that the air may be taken from the room itself instead« I from out of doors, if so desired. This is shown more particularlyin Fig. 76. Fig. 78 shows the wall box provided with louvre slats and netting,through which the air is drawn. A damper door is placed at either end of the radiator base;and, if desired, when thecold-

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