What does mechanical draft involve?

Mechanical draft involves the use of fans or mechanical devices to assist in the movement of air within a system, particularly in relation to combustion processes in furnaces or boilers. This method can enhance the efficiency of air distribution by actively supplying or removing air as needed, which often results in improved combustion efficiency and better control over the firing process.

In contrast to natural draft, which relies solely on buoyancy and temperature differences to draw in air, mechanical draft allows for more precise control over airflow, making it easier to optimize the combustion process. The use of fans can also accommodate changes in the combustion system or external conditions that might otherwise impede natural draft. This understanding is crucial in the design and operation of heating systems, ensuring they function safely and effectively.