The authors express their sincere thanks to the many organizations and manufacturers who cooperated so generously in supplying the technical information and many of the photographs used in this textbook. Any omissions from the following list are purely accidental. Acknowledgments Aeroquip Corp. Alco Alfa Laval Inc. Allied Signal American Electric Co. American Tool Companies, Inc. Amprobe Amtrol Bacharach, Inc. Baltimore Aircoil Company Beckett Big Blu Bitzer Bohn Heat Transfer Browning Calumet Refining Co. Carlin Combustion Technology, Inc Carrier Corporation ClimateMaster CooperTools Copeland Corp. Cutler-Hammer Danfoss Delavan Dunham-Bush DuPont Elf Atochem Emerson Climate Technologies The Energy Conservatory ESCO Group Fasco Fastenal Fluke Frigidaire Fuller Co. Grasslin Controls Corporation Halstead Hartford Compressors, Inc. H.B. Fuller Co. Henry Valve Co. Home Heating Systems Inc. Honeywell Hussmann Corporation Imperial Eastman ITW Ramset J. B. Industries John Walker Johnson Controls, Inc. Johnstone Supply J. W. Harris Co., Inc. Klein Tools, Inc. Kramer LaRoche Chemicals Lau Lennox International LoLo Building Products Lucas-Milhaupt Mac Tools, Inc. Malco Products, Inc. Manchester Tank The Marley Cooling Tower Company Mastercool Inc. Maytag Corporation McQuay International Metal Products Milwaukee Electric Tool Corp. Mobil Oil Corporation Mueller Industries, Inc. National Refrigerants Nibco NuTone, Inc. Paragon Electric Co. Penn Pikes Peak Community College Prest-O-Lite Ranco RB&W Corporation RCD Corporation Reed Manufacturing Co. Refrigeration Technologies The Ridge Tool Company Ritchie Engineering – YELLOW JACKET Products Division Robinair Mfg. Corp. Sealed Unit Parts Co., Inc. Simpson Electric Co. Smith Equipment, Division of Tescom Corp. Spectronics Corporation Sporlan Division - Parker Hannifin Corporation Standard Refrigeration Company Star Expansion Company State of Ohio Suntec Industries, Inc. Tecumseh Thermal Engineering Thermodyne TIF Instruments, Inc. Trane Triumph Twist Drill Co. United Refrigeration Uniweld Vaco Products Van Steenburgh Engineering Laboratories, Inc. Vermont American Vilter Mfg. Co. Virginia KMP Watsco Westermeyer Industries, Inc. Westwood Products, Inc. White-Rodgers Division, Emerson Climate Technologies York Zero Zone, Inc. v Copyright Goodheart-Willcox Co., Inc.