What is the purpose of a condensate drain in an HVAC system?

The purpose of a condensate drain in an HVAC system is to remove excess moisture produced by the cooling processes. When air is cooled, humidity in the air condenses into water as part of the refrigeration cycle. This moisture must be properly drained away to prevent issues such as water damage, mold growth, or reduced efficiency in the system. The condensate drain plays a crucial role in managing this excess moisture, ensuring that the cooling process can operate effectively without interruptions or problems related to accumulated water.

While there are other important components in HVAC systems, such as those that deal with refrigerant flow and air filtration, these functions do not pertain to the specific role of the condensate drain. The drain does not collect water from freezing units and is not meant for filtering air or regulating refrigerant, underscoring its dedicated function in moisture management.