How often should drain lines and pans be cleaned and inspected in HVAC systems?

The frequency of cleaning and inspecting drain lines and pans depends on various factors, including the type of HVAC system, usage, and environmental conditions. As a general rule, drain lines and pans should be inspected every 3-6 months, and cleaned annually or bi-annually. However, in areas with high humidity or heavy usage, more frequent cleaning and inspection may be necessary. It’s essential to consult the manufacturer’s recommendations and local regulations for specific guidance.