A forced-draft (FD) fan is a type of pressurized fan that gives off positive pressure within a system. It is mainly used in industries that employ boiler systems in order to promote boiler efficiency, but it has a wide range of applications.

What is the use of induced draft fan?

Induced draft fans or ID fans are used in systems such as steam boilers and thermal oil heaters to draw out and remove flue gases from combustion chambers, by creating a vacuum of negative air pressure (typically -10 mm Hg).

What is induced draft blower?

Fans that are used to evacuate a space or create negative air pressure in a system are referred to as induced draft fans. … The induced draft fans used in combustion systems are normally high temperature and extra heavy-duty construction.