File:School architecture; a handy manual for the use of architects and school authorities (1910) (14779468004).jpg

Identifier: schoolarchitectu00bruc (find matches)
Title: School architecture; a handy manual for the use of architects and school authorities
Year: 1910 (1910s)
Authors: Bruce, William George, 1856-1949 Bruce, William Conrad, 1882- Bruce, Frank Milton, 1885- (from old catalog)
Subjects: School buildings
Publisher: Milwaukee, Johnson service company
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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ally designed for an air velocity ofsix to eight hundred feet per minute, with agreater velocity in the horizontal supply flues.A flue 2l/2 feet square, 12 feet long with 30 percent, difference in temperature, will discharge250 cubic feet of air per minute. Fresh Air Supply.—Great care must betaken to secure for every school building thebest possible air. For this reason air must al-ways come directly from the outside through asupply which ought never begin at the ground.The fresh air supply pipe ought to be run upthe side of the building about twelve feet. Whilein three story buildings this may be more; itmust not be forgotten that smoke from adjoiningbuildings may contaminate the air if the supplypipe reaches too great a heighth. The pipe isbest placed on the south side of a building bothon account of the warmth of the exposure, asalso the disinfecting qualities of the sunlight. Itshould be covered with a wire netting, loosewove, and should be proportioned to the workrequired. 177
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178 Heating and Ventilation In almost every system the fresh air intro-duced into a building must be cleaned and tem-pered before transmission to classrooms. Eitherof the systems of air washing can be used effec-tively and will determine to an extent the suc-cess or failure of fresh air supply. Where tem-pering rooms and a plenum system are installedthe problem of air cleaning and tempering isreduced to merely the correct size and locationof the cleaners and the tempering room. Theselatter, whether rooms or chambers, should be airtight, and sufficiently large to raise the air to thetemperature required. They should be white-washed several times a year, cleaned continually,and be kept perfectly empty at all times. Air-Washer.—There are a number of schoolbuildings throughout the United States that haveinstalled so-called air-washers. They are de-signed to cleanse the air from dust and soot be-fore passing into the schoolrooms. The deviceconsists of a series of baffle plates so arrange

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