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PSG Controls Inc., 1225 Tunnel Rd., Perkasie, PA 18944; 800-782-8412 or 215-257-3621; 215-257-4288 (fax); www.psgcontrols.com
Publication date: 01/15/2007

With more than 500 pages of extensive information on such important topics as refrigeration systems, piping, ductwork, motors, compressors, fans, pumps and more, this "answer book" is one of the most complete HVAC/R professional references available.
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