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Effex® from A. O. Smith is the most efficient and advanced conventional vent product on the market, says the company. The patented air intake system turbocharges the combustion process to produce the highest efficiency available for a standard atmospheric product.
A. O. Smith's ProMax® is an energy-efficient residential water heater designed for households, providing long-lasting value and exceptional performance, says the company.
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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