What is the purpose of a draft inducer in an HVAC system?

The purpose of a draft inducer in an HVAC system is to improve combustion efficiency and help the furnace start safely. A draft inducer is a fan located within the furnace system that creates a negative pressure. This negative pressure draws the combustion gases out of the furnace and ensures that fresh air is supplied for the combustion process. By facilitating this airflow, the draft inducer plays a crucial role in maintaining the proper balance of air and fuel, which is essential for efficient combustion.

Additionally, this mechanism enhances safety by preventing the buildup of harmful gases within the heat exchanger and minimizes the risk of backdrafting, where exhaust gases flow back into the living space. In summary, the draft inducer not only helps achieve optimal performance of the furnace but also contributes significantly to the safety features of the HVAC system, ensuring that the indoor environment remains healthy and the equipment operates effectively.