Is it true or false that a fan-assisted draft furnace does not use dilution air?

A fan-assisted draft furnace is designed to create a more efficient and controlled combustion process by using a fan to assist in the drawing of combustion air into the furnace and to expel combustion gases. In this type of furnace, the fan helps to ensure that there is a sufficient supply of air for combustion directly from the outside atmosphere, which reduces the need for dilution air that is typically used in natural draft systems where airflow relies on temperature and density differences.

By design, fan-assisted draft systems optimize the combustion process, making it more efficient and reducing the excess air that would normally be necessary to dilute flue gases in a natural draft scenario. Therefore, the statement that a fan-assisted draft furnace does not use dilution air is accurate because it relies on a controlled air supply, negating the need for additional dilution air to maintain proper combustion efficiency.

Overall, the role of the fan in such systems allows for effective venting without the complications associated with dilution air, further supporting the notion that these furnaces do not utilize dilution air in the same manner as their natural draft counterparts.