Cyclopedia of Architecture, Carpentry and Building: A General Reference Work...

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American school of correspondence, 1907 - Architecture
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Page 221 - Fig. 38. Fig. 39. Fig. 40. Fig. 41. Fig. 42. Fig. 43. Fig. 44. Fig. 45. Fig. 46. Fig. 47. Fig. 48. Fig. 49. Fig. 50. Fig. 51. Fig. 52. Fig. 53. Fig. 54. Fig. 55. Fig. 56. Fig. 57. Fig. 58. Fig. 59. Fig. 60. Fig. 61. Fig. 62.
Page 168 - There are two methods of overcoming this difficulty : 'x'he older arrangement consists in heating the air by means of a primary coil at or near the fan to about 60 degrees, or to the minimum temperature required within the building. From the coil it passes to the bases of the various flues and is there still further heated as required, by secondary or supplementary heaters placed at the base of each flue.
Page 2 - HARRIS C. TROW, SB, Managing Editor Editor-in-Chief. Textbook Department. American School of Correspondence. American Institute of Electrical Engineers. Authorities Consulted THE editors have freely consulted the standard technical literature of...
Page 156 - The general method of computing the size of heater for any given building is the same as in the case of indirect heating. First obtain the BTU required for ventilation, and to that add the heat loss through walls, etc.; and divide the result by the efficiency of the heater under the given conditions. Example. An audience hall is to be provided with 400,000 cubic feet of air per hour. The heat loss through walls, etc., is 250,000 BTU per hour in zero weather.
Page 168 - The varying exposures of the rooms of a school or other building similarly occupied, require that more heat shall be supplied to some than to others. Rooms that are on the south side of the building and exposed to the sun, may perhaps be kept perfectly comfortable with a supply of heat that will maintain a temperature of only 50 or 60 degrees in rooms on the opposite side of the building which are exposed to high winds and shut off from the warmth of the sun.
Page 126 - Should the water in any of the radiators fail to circulate, see that the valves are wide open and that the radiator is free from air. Water must always be added at the expansion tank when for any reason it is drawn from the system. The required temperature of the water will depend upon the outside conditions, and only enough fire should be carried to keep the rooms comfortably warm. Thermometers should be placed in the flow and return pipes near the heater, as a guide. Special forms are made for...
Page 22 - Fig. 15. damper is attached, so that part of the air will pass through the heater and part around or over it ; in this way the proportions of cold and heated air may be so adjusted as to give the desired temperature to the air entering the rooms. These forms of regulation are common where a blower is used for warming a single room as in the case of a church or hall ; but where several rooms are warmed, as in a schoolhouse, it is customary to use the main or primary heater at the blower for warming...
Page 69 - ... connection for each radiator. When the return main is overhead, the risers should be dripped through siphon loops; but the ends of the branches should make direct connection with the returns. This is the reverse of the two-pipe system. In this case the lowest pressure is at the ends of the mains, so that steam introduced into the returns at these points will cause no trouble in the pipes connecting between these and the boiler. If no steam is allowed to enter the returns, a vacuum will be formed,...
Page 14 - Where the boiler is used for heating purposes only, a low steam pressure of from 2 to 10 pounds is carried and the condensation flows back by gravity to the boiler which is placed below the lowest radiator. When, for any reason, a higher pressure is required, the steam for the heating system is made to pass through a reducing valve and the condensation is returned to the boiler by means of a pump or return trap. The methods of Fig. 3. making the pipe connections between the boiler and radiators vary...
Page 11 - ... in a casing of sheet iron or brick. The bottom of the casing is provided with a cold-air inlet, and at the top are pipes which connect with registers placed in the various rooms to be heated. Cold fresh air is brought from out of doors through a pipe or duct called the

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