Draft inducers and combustion air systems move air through a combustion system to increase the intake and exhaust airflow. Draft inducers move combustion gases through the exhaust section of a combustion system and ensure they are removed from the combustion chamber. Combustion air systems move fresh air into the mechanical space in a continuous, controlled fashion. This airflow helps force combustion gases out through the exhaust and helps to ensure that there is enough oxygen for efficient combustion.