In the first and second reports of this committee, the purposes and objectives of air conditioning have been set forth by Yaglou,1 one of the members of this committee. The control of conditions affecting comfort, health and efficiency in an artificial space environment involves a number of physical, chemical, biologic, and even psychic factors for which tentative standards have been suggested by various more or less authoritative groups.2
"Air conditioning" is the present term adopted for covering these factors but, as commonly used, this term does not embrace other environmental conditions, such as insulation, radiation, illumination and noise, which may be important collateral factors.
The present report deals solely with the equipment designed for procuring suitable conditioning of the air. A subsequent committee report will consider the instruments and procedures suitable for examining air conditions found or produced.
The practice of air conditioning in the