Regular HVAC equipment maintenance is crucial to prevent Legionella growth in adjacent irrigation systems. Poorly maintained HVAC equipment can generate excessive heat, which can contribute to warm stagnant water in irrigation systems, creating an ideal environment for Legionella growth. Additionally, HVAC equipment can introduce contaminants into the irrigation system through condensate drainage or other means. Regular maintenance, including cleaning and inspecting HVAC equipment, can help minimize these risks and reduce the likelihood of Legionella proliferation.