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 that is produced during the cooling process. When an air conditioning system operates, it cools the air, and as the air temperature drops, it can no longer hold as much moisture. This results in condensation, which collects as water. If this moisture is not properly drained away, it can lead to water damage, mold growth, and decreased efficiency in the system.

The condensate drain serves to channel this water safely away from the air handling units, ensuring that the system operates efficiently and maintaining indoor air quality. It is a crucial component that prevents issues associated with excess humidity in the conditioned space.