The ExactCharge calculator can calculate superheat and subcooling for 28 refrigerants and other pressure and temperature correlations and displays the required suction or liquid line temperature. Also, it can be used as a duct-sizing calculator, providing a readout for round, rectangular, and flex ducts. It is designed for use in the field for diagnosing and proper charging, not strictly for analysis. The Refrigerant Charge Verification Report can be used with the calculator for logging equipment performance. By using this report over time on the same system, a performance baseline is logged. When changes occur in this data, the system can be checked and repaired.

ExactCharge Industries Inc., 795 E. Hemet Pl., Tucson, AZ 85755; 520-850-6168; www.exactcharge.com

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