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The rear flue gas outlet shutter is a component that controls the exhaust flow of flue gases from the boiler or burner system. As an important part of heating equipment components, this shutter helps regulate draft and ensures safe evacuation of combustion byproducts. It is typically located at the rear of the unit and may be adjustable to optimize flue gas flow. Proper functioning of the flue gas outlet shutter is critical for preventing backdraft and maintaining efficient operation. In boiler maintenance and repair, replacing a defective shutter can resolve issues with poor combustion or excessive emissions. This part is a key element in the overall exhaust system, contributing to both safety and performance.