Is it mandatory for every oil furnace to have a barometric damper?

The necessity for a barometric damper in oil furnaces is dependent on specifics such as installation practices and local building codes rather than a blanket mandate for every furnace. A barometric damper is used to regulate the draft in the flue, ensuring proper operation and efficiency of the furnace. However, it is not a universal requirement for all oil furnaces. Some modern designs or innovations may have built-in mechanisms that eliminate the need for an additional damper. Additionally, variations in local regulations and individual installation guidelines further influence whether a damper is required. Hence, the answer accurately reflects that not every oil furnace is mandated to have a barometric damper, emphasizing the importance of understanding specific requirements and regulations related to HVAC installations.