Refrigerant Piping Design (RPD) is a free utility designed for Windows that simplifies the process of refrigerant piping calculations. Utilizing data from the ASHRAE Handbook – Refrigeration, it supports various refrigerants including R-22, R-134a, and R-717. The program allows users to size suction lines, hot gas discharge lines, and liquid lines, accommodating both comfort cooling and low-temperature applications with ease. The user-friendly interface requires minimal input to generate accurate piping designs.

RPD automatically adjusts calculations based on system operating conditions, ensuring precise results through data interpolation. Additionally, users have the flexibility to manually specify pipe sizes to assess the resulting pressure drops. This combination of automatic adjustments and manual input options makes Refrigerant Piping Design a versatile tool for professionals in the refrigeration and HVAC industries.