What is a barometric damper used for?

A barometric damper is a crucial component in venting systems, specifically designed to regulate draft. Its primary function is to maintain the proper amount of air flow within a furnace or boiler's flue gas vent. By adjusting to changes in atmospheric pressure, the barometric damper ensures that combustion gases are effectively vented outside while preventing backdrafts that could hinder performance or pose safety risks. This regulation is essential for the efficient operation of gas appliances, thereby promoting safety and efficiency.

In contrast, increasing pressure in gas lines or controlling gas flow to appliances would involve different mechanisms, such as regulators or control valves. Preventing gas leaks is a vital safety concern typically addressed through proper installation and maintenance of gas lines and appliances, rather than through a barometric damper. Therefore, recognizing the specific function of a barometric damper in regulating draft is critical for understanding its role in gas venting systems.