A complete handbook for the sanitary troops of the U S army and navy . Fig. -?6.—Heating by Hot pressure. AIR AND VENTILATION 347 is provided at the highest point of the system to allow for expansionand the escape of gases. The circulation of the water is due to thedifference in weight of the columns of hot and cold water. Thewater is heated in a boiler in the basement; from the top of theboiler rises a main, with branches to all parts of the building; thesebranches terminate in radiators, and from the bottom of each radi-ator a branch return comes off, the branch returns uniting to
A complete handbook for the sanitary troops of the U S army and navy . Fig. -?6.—Heating by Hot pressure. AIR AND VENTILATION 347 is provided at the highest point of the system to allow for expansionand the escape of gases. The circulation of the water is due to thedifference in weight of the columns of hot and cold water. Thewater is heated in a boiler in the basement; from the top of theboiler rises a main, with branches to all parts of the building; thesebranches terminate in radiators, and from the bottom of each radi-ator a branch return comes off, the branch returns uniting to form amain return, which empties into the lower part of the boiler. Asthe water in the boiler becomes heated it grows lighter, and the. Fig. 22-.—Heating by Steam. Low pressure. heavier water in the returns falls and forces up the hot water, thuseffecting a circulation {\\g. 226). In the high-pressure system the pipes are completely closed; hencethere is some danger of explosion, but the water can be made hotterand circulation is more rapid. Steam heating is the same in principle as the low-pressure hot-water heating, only steam is used instead of water, and the pipesconstitute a closed system (Fig. 227 )• Radiators heated by either steam or hot water may be placed in theroom to be heated without any connection with the outside air; this isknown as the direct system; or they may be placed in the basementor some other room, enclosed in a sheet-iron box connected with afresh-air shaft, the warm air being then conducted to the room, theindirect system; or the radiator may be placed in the room to beheated and the fresh air brought directly in under it and allowed topass up between the pipes so as to be warmed, the di
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfirstaidinillnessand
