Document ppzKy8d1ZRVjwZQ9O8zdNgmOX

Copyright, 1922, by American Society of Heating & Ventilating Engineers ^ TW. PREFACE N issuing this, the First Annual Edition of The Guide, a distinctly Inew service is rendered by the Society, not only to its membership but to the heating and ventilating industry at large. The purpose of this new addition to the Society's publications is to provide the engineer, the architect and the contractor alike, with a useful and reliable reference data book relating to the art of heating and ventilat ing. A wide range of data within the scope of the field is presented and every effort has been made to present the material in a practical and usable manner. In addition, the Catalog Data Section provides a means whereby manu facturers may inform the users of heating and ventilating equipment of the most modern and advanced equipment available, suggesting the proper applications of such equipment. The data presented in the Catalog Data Section forms riot only a compend of reliable information, but a collection of related data which will permit more intelligent selection and comparison of modem equipment. The American Society of Heatirig and Ventilating Engineers, being an. institution for the advancement of the arts and sciences connected with its field, publishes this volume to render a service to the industry and to form a cooperative basis for closer contact between the maker and user of equipment. Any funds which may accrue from the activity will be devoted to research, which will react to the mutual advantage of the entire profession, as well as the trade. All Catalog Data presented have been carefully edited in an effort to eliminate exaggerated claims or statements. However, it must be borne in mind that publication of manufacturers' data does not imply the Society's endorsement or approval, and that the Society cannot assume responsibility for statements made in catalog data or in papers presented. The data appearing in the General Data Section are based' upon the most reliable information obtainable and represent the actual practice of the most prominent and successful engineers in the filed. As rapidly as possible the Research Bureau will investigate these data and standardize them for the general use of the profession and the trade. The findings of the Research Bureau will be published in future editions of The Guide and thus made, annually and continuously, available to the profession and the trade. The Guide Publication Committee realizes that this, the first edition of The Guide, is imperfect in many ways. It represents, however, the most 5