Acknowledgments The author and publisher would like to thank the following companies, organizations, and individuals for their contribution of resource material, images, or other support in the development of Heating and Cooling Essentials. 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 DiversiTech Corporation Dunham-Bush DuPont Elf Atochem Emerson Climate Technologies The Energy Conservatory ESCO Group Fasco Fastenal Fluke Frigidaire Fuller Co. Fujitsu General America, Inc. Goodman Manufacturing Company, L.P. 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 JB Industries Johnson Controls, Inc. Johnstone Supply John Walker J. W. Harris Co., Inc. Klein Tools, Inc. Kramer LaRoche Chemicals Lau Lennox International LoLo Building Products Lucas-Milhaupt vi