HVAC Chart 3 Pack, R-22, R-410a and Duct Calculator

Simplify HVAC calculations with this practical 3-pack of durable, slide-chart calculators from Datalizer. The R-22 and R-410a Subcooling Calculators help determine the required subcooling temperature for TXV applications, ensuring optimal refrigerant charge and system efficiency. The Duct Calculator assists in sizing ductwork for proper airflow. Follow the straightforward instructions to measure liquid line temperature and pressure, then read the corresponding values. These heavy-duty calculators are designed for frequent use in the field, providing reliable reference tools for HVAC professionals. Keep one set in your truck and another in the shop for quick access to essential HVAC calculations.