File:Practical steam and hot water heating and ventilation (1908) (14578898487).jpg

Identifier: practicalsteamho00king (find matches)
Title: Practical steam and hot water heating and ventilation
Year: 1908 (1900s)
Authors: King, Alfred G. (Alfred Grant), b. 1866
Subjects: Steam-heating Hot-water heating Ventilation
Publisher: New York : N. W. Henley Pub. Co.
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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sure, with liabilityto damage by explosion. Water Connection The water connection to a hot-water heating apparatus shouldbe made by connecting into the return pipe at the rear of the boiler.Where there is no regular water supply and it is necessary to fillthe system by hand or with a pump, the connection must of neces-sity be made at the tank or the top of the system. Table of Expansion-tank Sizes The following table gives the proper size of expansion tank forany hot-water heating apparatus up to 6,000 sq. ft. of radiation. TABLE XIII Capacity. Size. 300 sq. ft. radiation 10 gal. 12X20 500 15 12X30 700 20 14X30 950 26 16X30 1,300 32 16X36 2,000 42 16X48 3,000 66 18X60 5,000 82 20X60 6,000 100 22X60 The Overhead System A style of piping for hot water which, when it has been prop-erly erected, has met with much favor, is the so-called overheadsystem. We do not hesitate to say that it is the best methodof hot-water piping in use to-day, and while it is not adaptable HOT-WATER HEATING 129
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130 PRACTICAL HEATING AND VENTILATION to all classes of buildings, there are many, such as flat or apart-ment buildings, store and office buildings, hotels or factories, wherethe character of construction, manner of dividing the space intoliving rooms, offices, etc., render the overhead system particularlyserviceable. There are many advantages to be gained by the useof this system, the principal one being that but one riser or droppipe is necessary for supplying a line of radiators, and also thatthe circulation of the water is both positive and rapid. No airvents are necessary at any point on the system, as the pipingis so arranged that all air works to the top of the system intothe expansion tank and through this to the atmosphere, thuskeeping the system free from air at all times and as the removalof air from the heating system is one of the great troubles ofthe steam fitter, much good has been accomplished by this alone. MAI NT ^BRANCH

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