Extension booms are designed to increase the reach of self-supporting arms or other exhaust products such as flexible hose drops and reels. The swinging extension boom helps access areas distant from a wall or mounting point. They can also be used to support items such as hoses, cables, or feeders. The top and bottom outlet of the boom wall mounting bracket is designed to accept a fan or duct connection. The extension beams are manufactured of heavy gauge square steel tube welded to heavy duty hinge. As a standard, all units are supplied with an inlet bracket to mount fume arms. Double pivot type extension booms are divided by a centre hinge which allows the user to reach back under the boom or just simply to reach around a corner. There are no internal mechanisms within the boom duct, this allows for a reduced noise level. All adjustment mechanisms are located on the outside of the boom. Extension booms are heavy duty products of remarkable reliability and operational life-time.