ASPE and ASHRAE codes and standards play a crucial role in shaping the design and installation of irrigation systems in HVAC applications. ASPE’s plumbing engineering standards provide guidelines for piping, fittings, and valves, while ASHRAE’s standards focus on the thermal performance and energy efficiency of HVAC systems. By following these codes and standards, HVAC professionals can ensure that irrigation systems are designed and installed to optimize water usage, reduce energy consumption, and minimize environmental impact.