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The Trane Company
Hand held rotating calculator used for sizing supply and return duct systems using the equal friction design method. Includes scales for friction loss per unit length, air volume, air velocity, round duct diameter, and rectangular duct diameters. One side uses English units, the other side uses Metric units. Includes a protective sleeve with ASHRAE recommended design air velocities for system components/applications. This is required for the Florida State Certified Contractor's exams for Air Conditioning A & B, Mechanical and Sheet Metal.
Your Price: $12.00