A forced draft fan pushes air into a system. An induced draft fan pulls exhaust gas, fumes, hot air, or flue gas out of a system. That is the basic difference, but it is not enough for correct fan selection. In many boilers, furnaces, dryers, scrubbers, bag filters,...

A forced draft fan in a boiler system supplies controlled combustion air into the furnace under positive pressure. In practical plant operation, the FD fan is not just an air-moving device. It affects combustion stability, fuel burning, furnace draft balance, steam...

Choosing the right forced draft fan is not only about buying a fan with enough motor HP. A good FD fan selection starts with airflow, static pressure, duct resistance, air temperature, dust load, operating duty, impeller design, material of construction, and the way...