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The wireless thermostat can be used for commercial and residential applications, noted Mark O’Donnell, regional sales manager, Digital Appliance/HVAC Division.

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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