Boiler Draft & Flue Gas Exhaust

Boiler fan systems are primarily arranged as forced-draft or induced-draft equipment, with each serving a different position in the boiler air and flue-gas path.

Forced-draft fans supply combustion air to the boiler or furnace system. The fan provides the airflow required for combustion and maintains the required air supply through the connected air duct system.
Applications include industrial boilers, combustion systems, heating equipment, and other thermal systems requiring controlled combustion-air supply.

Induced-draft fans extract flue gas from the boiler system and move the gas through downstream equipment and flues toward the discharge point.
The fan can operate with dust collectors, filters, desulfurization equipment, ducts, chimneys, and other components forming part of the flue-gas path.

Boiler exhaust systems can include high-temperature and dust-containing gas streams, particularly where solid fuels or other particulate-generating combustion processes are involved.
The fan is installed as part of the complete gas-handling system and must remain compatible with the downstream equipment and operating conditions.

Forced-draft fans operate on the combustion-air side, while induced-draft fans operate on the flue-gas side.
The complete system can include air ducts, burners, boilers, dust collectors, flues, dampers, chimneys, and other gas-handling equipment. Fan arrangement and configuration are confirmed according to the position and function within the boiler system.