What does a draft hood do in a combustion system?

A draft hood in a combustion system serves the important function of allowing the entry of ambient air. It is designed to ensure that there is a proper airflow around the appliance, which is critical for efficient combustion and safe operation. By facilitating the mixing of combustion gases with fresh air, it helps maintain a balanced atmosphere within the flue system. This is essential for preventing the buildup of harmful gases, ensuring that exhaust is vented properly, and enhancing overall efficiency.

While it does contribute to the ventilation of the appliance, it does not actively increase ventilation as a primary function; rather, it helps maintain a balanced environment for combustion and exhaust processes. Understanding the role of the draft hood helps in comprehending the broader context of safety and efficiency in combustion appliances.