In boiler operations, which measurement indicates the strength of the draft?

The strength of the draft in boiler operations is best indicated by pressure. Draft refers to the difference in pressure between the inside of the boiler and the outside atmosphere or the flue gases. A strong draft ensures that combustion gases are efficiently removed from the combustion chamber and not allowed to escape into the workspace, which is crucial for both efficiency and safety.

When measuring the strength of the draft, technicians often use a manometer to measure the pressure differential. A sufficient draft ensures that there is enough negative pressure to draw in the necessary combustion air while expelling exhaust gases, which helps maintain proper combustion conditions.

Understanding the pressure in the draft system is essential for optimal boiler performance, as insufficient draft can lead to incomplete combustion, increased emissions, and operational issues, while excessive draft can lead to excessive heat loss and energy inefficiencies.