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PHYSICAL AND PHYSIOLOGIC PRINCIPLES OF AIR CONDITIONING

C. P. YAGLOU, M.S.
JAMA. 1937;108(20):1708-1713. doi:10.1001/jama.1937.92780200005008.
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Air conditioning for comfort or health is the art of controlling the physical environmental factors to suit human requirements. Great strides have been made in the past few years along purely engineering lines, but our knowledge of human requirements is still incomplete and controversial.

In the present paper an attempt is made to digest and evaluate some of the basic physical and physiologic principles involved, and to point out where data are inadequate and where research is urgently needed.

THE NEED FOR AIR CONDITIONING 

Alteration of the Atmosphere of Occupied Rooms.  —In rooms occupied by many persons the air is altered physically and chemically by the processes of body metabolism and decomposition of matter in the skin and clothing. Contrary to earlier workers, we are not at all concerned now with the changes of oxygen and carbon dioxide from respiratory processes, because they ordinarily are much too small to be

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