What is the purpose of a barometric damper?

The purpose of a barometric damper is to regulate draft pressure in the chimney. It is an essential component in oil burning systems, helping to maintain the correct balance of airflow through the system. By automatically adjusting to changes in chimney draft, the barometric damper ensures that combustion gases are expelled efficiently while preventing excessive negative pressure from disrupting the burner’s operation. This regulation is crucial for optimal combustion, allowing the burner to operate more reliably and efficiently.

The barometric damper achieves this by utilizing a weighted flap that opens or closes based on the pressure differential between the chimney and the surrounding atmosphere. When the draft is too strong, the flap opens to reduce pressure; when the draft weakens, the flap closes to maintain adequate pressure. This dynamic adjustment is key in facilitating proper air intake for combustion while removing exhaust gases from the system, thus enhancing overall safety and efficiency.

Other options, such as enhancing fuel flow or preventing backdrafts, while related to combustion systems, do not accurately represent the primary function of a barometric damper. Instead, its main role is centered around managing draft pressure, making it a vital component in maintaining the operational integrity of oil burner systems.