Why is draft carefully controlled in a burner system?

Controlling the draft in a burner system is essential to ensure that the fuel is burned completely. A well-controlled draft allows for the proper mix of air and fuel, which is critical for efficient combustion. If the draft is too strong or too weak, it can lead to incomplete combustion of the fuel, resulting in unburned hydrocarbons and potentially harmful emissions, as well as lower thermal efficiency. Adequate draft also helps maintain an optimal flame temperature, contributing to efficiency and safety in the burner operation. Therefore, the primary reason for controlling the draft is to ensure that the burning process is complete, which maximizes energy output and minimizes pollutants.