What is the difference between Natural Draft and Forced Draft Burners.

Difference between Natural Draft and Forced Draft Burners.

Natural Draft and Forced Draft burners differ in the way they create airflow. They are used in a variety of industrial applications 

that require the use of heat to achieve and utilize controlled combustion for a specific heating process. Natural Draft and 

Forced Draft burners are process heating equipment used in the production, transportation, and refining of many everyday 

products. Both have unique capabilities in controlling and generating the required heat and maintaining the exact temperature 

for each specific application.

How Do Natural Draft and Forced Draft Burners Work?

When looking at natural draft and forced draft burners, the word "draft" describes the difference between atmospheric pressure 

and the existing pressure in the gas passage or combustion chamber, which causes the gas and air to move. Fire tubes and 

chimneys are usually built in a cylindrical shape to provide the best structure for air flow. Both natural draft and forced draft 

burners are used to mix fuel and air to maintain a safe, stable, and efficient flame. They operate as part of a complete system that 

contains the burner, secondary air control, pilot, orifice, fuel actuator, and burner management system controller. The substance 

being heated can include fluids, gases, or recycled materials. Natural draft burners use the difference in density between hot and 

cool air or flue gases to create pressure to move fluid through the combustion chamber. Flue gases are a mixture of gases produced 

by burning fuel or other materials. Forced draft burners use electricity to create mechanically assisted air pressure within the system 

to move air or flue gases. This allows for a greater level of consistency and control. Both types of burners are available in a variety of 

sizes and have a variety of industrial uses.


Industries that use natural draft and forced draft burners include:

  • Oil and Gas

  • Power Generation

  • Mining

  • Biotech

  • Petrochemical and Refining

  • Renewable Energy

  • Landfills

  • Agriculture

  • Municipal

  • Food and Beverage

  • Construction and Infrastructure

  • Pulp and Paper