Abstract: A burner utilizing a low pressure fan for atomizing oil and supplying air for combustion. The burner includes an air-tube, an air-atomizing nozzle disposed in the air-tube, a conduit for supplying oil to the nozzle, and a fan for supplying air to the air-tube. A back plate, a retention plate, and a side ring meter primary air to the nozzle and provide a chamber through which secondary air passes around the nozzle. The side ring is provided with a plurality of apertures for directing secondary air inwardly into a chamber desirably normal to the direction from which the secondary air is discharged therefrom. Also disclosed is a novel three-piece air-atomizing nozzle.

Abstract: A burner head with a central tubular chamber through which air flows has an annular chamber around the tubular chamber. Gas flows forward through the annular chamber. The end wall of the annular chamber is an annulus having five openings therethrough. Five tubular nozzles extend forward and radially inward from these five openings to direct the flow of gas toward the ignition electrode and the combustion zone within the tubular chamber. Three of the nozzles are relatively close to one another along a short arc at the upper portion of the annulus. Two of the nozzles are positioned about 120.degree. from one another along the lower portion of the arc of the annulus.