What is the purpose of a draft inducer in a furnace?

The purpose of a draft inducer in a furnace is primarily to enhance flue gas extraction. This component aids in creating a consistent airflow through the furnace's heat exchanger and into the flue or chimney, ensuring that combustion gases are effectively removed from the combustion chamber.

By facilitating the removal of flue gases, the draft inducer helps maintain the appropriate pressure within the system, which is critical for optimal furnace operation. Efficient extraction of flue gases not only supports safe operation by preventing the accumulation of harmful gases within the furnace but also contributes to overall efficiency by allowing the combustion process to operate under optimal conditions. Keeping the combustion chamber free from excess pressure helps in achieving a balanced combustion process, which is vital for both performance and safety.

Options such as assisting in combustion air supply or improving fuel efficiency relate to other aspects of furnace operation but do not directly address the primary role of the draft inducer. While preventing backdrafts is important for overall safety, the draft inducer itself is more specifically associated with enhancing flue gas extraction rather than preventing backdrafts directly.