Document OE8DJG7dE69VqJj88pB04y5o1

PREFACE TO THE 13th EDITION THE ambitious plans of the Guide Publication Committee, embodying several innovations to extend the usefulness of this reference volume, have been, incorporated in this 13th annual edition of The American Society of Heating and Ventilating Engineers Guide. The process of reviewing, revising and reconstructing the Technical Data Section and then coordinating the complex subject matter of the 41 chapters has engaged the attention of over 200 members so that The A.S.H.V.E. Guide 1935 will appeal to an increasing number of readers and give them comprehensive data that are authoritative and practical. Basic and fundamental data have been retained from previous editions and in those divisions where changes-in practice have been observed modifications have been made in the text to bring the material up-to-date. The text of The Guide 1935 now comprises two major divisions: the subject matter of chapters and a supplementary section of the problems and answers. These problems and their solutions presented as an appen dix to each chapter represent the interpretation of the text by a com petent engineer whose analysis has been carefully reviewed by the Guide Publication Committee. It should be understood, however, that for certain general questions, more than one answer can be made so that the addition of these questions which represent problems in practice greatly broadens the scope of The Guide and generally enhances its usefulness. As developments in the manufacturing field have produced new appa ratus and new applications of equipment for automatic heat and air conditioning to improve comfort, those chapters of The Guide which discuss such equipment as controls, air washers, unit conditioners, oil burners, stokers, etc., have been reviewed by representative committees of engineers from manufacturers' associations so that the latest develop ments in their respective fields could be included. The original conception of The Guide outlined by its founders has been carefully safeguarded and the aim of the Guide Publication Com mittee is to have The Guide 1935 maintain its leadership, and continue in its role, as the recognized authority in the fields of heating, ventilating and air conditioning. Thousands of engineers, architects, contractors and students have come under the influence of The Guide since its first appearance in 1922 and they have found the data authoritative for their work in design, specification writing, installation or operation of appa ratus and systems. The Catalog Data of manufacturers is nearly 40 per cent greater' in this current edition indicating that The Guide is also recognized as an effective advertising medium for promoting the use of modern equipment. The Guide 1935 contains 150 pages more than the preceding volume and the Guide Publication Committee release this 13th edition of 10,000 copies, as a major contribution by the Society toward the general advancement of the engineering profession and its allied industries in the field of heating, ventilating and air conditioning. GUIDE PUBLICATION COMMITTEE W. L. Fleisher, Chairman John Howatt G. L. Larson S. R. Lewis E. N. McDonnell W. M. Sawdon J. H. Walker iv i EDITORIAL ACKNOWLEDGMENT IT is with a profound feeling of pride that the Guide Publication Committee acknowledges the assistance and cooperation of the many contributors to the Technical Data Section which appears in The Guide 1935. T. N. Adlam Prof. A. B. Algren -H.-L.-Alt -- H. H. Angus W. R. Appeldoorn O. W. Armspach. F. F. Bahnson A. E. Beals E. H. Beling Pauline Blackshaw J. J. Bloomfield Bernard Bock C. A. Booth D. S. Boyden J. J. Braun Albert Buenger C. A. Bulkeley E. K. Campbell M. L. Carr R. E. Cherne L. A. Cherry ' P. D. Close J. F. S. Collins, Jr. R. P. Cook W. E. Cranston A. A. Criqui J. M. DallaVallk M. I. Dorfan S. H. Downs T. F. Dwyer Prof. E. O. Eastwood Louis Elliott John Everetts, Jr. Prof. M. K. Fahnestock F. H. Faust W. G. Frank Hugo Fricke W. F. Friend S. L. Goodwin Dr. F. E. Giesecke W. A. Grant _ . Dr. Leonard Greenburg Herbert Herkimer J. R. Hertzler L. W. Hildreth Dr. E. Vernon Hill H. G. Hill Prof. J. D. Hoffman J. H. Holton F. C. Houghten Lloyd Howell Prof. C. M. Humphreys H. F. Hutzel J. W. James H. B. Johns R. E. Jones M. G. Kershaw D. D. Kimball Dr. V. O. Knudsen S. Konzo Prof. A. P. Kratz C. E. Lewis E. C. Lloyd G. W. Martin J. S. M. Mathewson P. F. McDermott John McElgin William McLeish . H. B. Meller . R. A. Miller Dr. C. A. Mills D. L. Mills F. W. Morse O. W. Motz H. C. Murphy Prof. D. W. Nelson A. J. Nesbitt P. Nicholls .Prof. L, S. O'Bannon G. E. Olsen G. H. Osborne J. S. Parkinson ' Albert Pelletier E. C. Rack W. C. Randall P. L. Reed -W. N. Rich Prof. T. F. Rockwell -C. Z. Rosecrans -Prof. F. B. Rowley -E. B. Royer S. S. Sanford "J. H. Scarr L. W: Schad W. G. SCHL'ICHTING F. E. Sedgwick J. G. Shodron W. C. Smith W. H. Smith W. E. Stark C. W. Stewart D. J. Stewart A. G. Sutcliffe D. L. Taze L. A. Teasdale C. A. Thinn W. W. Timmis C. L. Toonder R. N. Trane Walter Tusch Prof. G. L. Tuve W. M. Wallace, II ' F. W. Wandless i Perry West Prof. C. P. Yaglou Special mention is due the several Committee members who acted as division chairmen and who devoted long hours and gave generously of their knowledge without thought of compensation other than the satis-. faction of contributing to the advancement of the profession. The work f J-. L. Blackshaw as technical assistant in the detailed work of com pilation was worthy of special acknowledgment. GUIDE PUBLICATION COMMITTEE