What is the purpose of the condensate drain in a high-efficiency furnace?

The purpose of the condensate drain in a high-efficiency furnace is to remove condensation produced during the combustion process. High-efficiency furnaces operate with condensing technology, which allows them to extract more heat from the gases produced during combustion. This process cools the flue gases to the point where water vapor condenses into liquid water. The condensate drain is essential in this system as it safely directs this water away from the furnace, preventing any potential damage and maintaining the furnace's efficiency. Without a proper drainage system, the accumulation of condensate could lead to issues such as corrosion or water damage within the furnace or surrounding areas.