Which statement correctly describes the role of dampers in stack draft control?

Which statement correctly describes the role of dampers in stack draft control?

• A. Dampers are used to monitor flue gas composition.
• B. Dampers are used to adjust boiler feedwater flow.
• C. Dampers regulate the amount of combustion air entering the furnace, controlling draft and flue gas flow.
• D. Dampers remove moisture from flue gas.

Answer: (C)