Abstract: A burner including a cyclone shaped housing divided by a baffle plate into an upper cyclone chamber and lower chamber, the walls of the chambers are formed to resist heat and corrosion, the baffle plate extends across a major portion of the width of the chamber and is positioned above an inlet to the lower chamber, the upper cyclone chamber having a tangential air inlet near to a cover plate which extends across the upper chamber and which has an outlet from the chamber centrally situated therein, the arrangement being such that in operation a particulate fuel is blown into the upper chamber via the tangential inlet to then fall and burn around the outer edge of the baffle plate in the chamber into which additional air is blown from below to assist burning in the chambers, the heat produced and exhaust gases exiting from the outlet, for use, as required.