Azeotropic vs. Zeotropic Refrigerants The difference between an azeotropic vs zeotropic refrigerant is mainly about what happens to a refrigerant blend as it changes phase. ASHRAE defines an azeotropic refrigerant as a blend whose equilibrium vapor and liquid compositions are the same at a given pressure, while a zeotropic refrigerant...

12 Refrigerant Charging Mistakes That Cause Problems Many refrigerant charging mistakes happen because a technician treats refrigerant charge as a pressure-only adjustment. A system can show unusual suction or head pressure because of airflow, outdoor temperature, indoor load, metering-device behavior, a dirty coil, a leak, or a sensor problem. Adding...

Refrigerant Cylinder Sizes Explained: Ounces, Pounds, Tare Weight Refrigerant cylinder sizes can be confusing because the number printed in a product title usually describes the net refrigerant inside, not the total weight of the package you lift. A “25 lb” refrigerant product generally refers to approximately 25 pounds of refrigerant...