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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sible, they shouldboth be located in the same side of the room. Figs. 2,3, and f showcommon arrangements. The vent outlet should always, if possible, be placed in an insidewall; otherwise it will become chilled and the air-flow through it willbecome sluggish. In theaters and churches which are closely packed,the air should enter at or near the floor, in finely-divided streams; andthe discharge ventilation should be through openings in the ceiling.The reason for this is the large amount of animal heat given off fromthe bodies of the audience; this causes the air to become still furtherheated after entering the room, and the tendency is to rise continuously 22 HEATING A\D VENTILATION 13 from floor to ceiling, thus carrying away all impurities from respirationas fast as they are given off. All audience halls in which the occupants are closely seated shouldbe treated in the same manner, when possible. This, however, can-not always he done, as the seat- are often made removable so that the
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OOTS/D£ WALL OUTSIDE WALL OUTSID£ WALL I)- Pig. 3. g. 4. Diagrams Showing Relative Positions of Air Inlets and Outlets as Commonly Arranged.floor can he used for other purposes. In cases of this kind, part ofthe air may he introduced through floor registers placed along the outeraisles, and the remainder by means of wall inlets the same a- for school-rooms, Idie discharge ventilation should he partly through registersnear the floor, supplemented by ample ceiling vents for use when thehall is crowded or the outside temperature high. The matter of air-velocities, size of Hues, etc., will he taken upunder the head of Indirect Heating. HEAT LOSS FROM BUILDINGS A British Thermal Unit, or B. T. I., has been defined as theamount of heat required to raise the temperature of one pound ofwater one degree F. This measure of heat enters into many of thecalculations involved in the solving of problems in heating and ventila-tion, and one should familiarize himself with the exact meaning ofthe te

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