Patent ID: 6923643
Filing Date: 2005-08-02
Classification: F23D

Abstract:
1. A burner assembly for use in a warm air furnace comprising: a cooling air box for receiving air; a premix burner for receiving air-fuel premix, the premix burner being positioned within and spaced apart front the cooling air box; and a burner face assembly defining a front end of the premix burner, the burner face assembly having a first plate positioned on top of a second plate, the second plate positioned on top of a third plate, each plate having a plurality of burner openings, each burner opening in each plate being aligned with a corresponding burner opening in each of the other plates; wherein the burner openings of the second plate are larger in diameter than the burner openings of the third plate, and the burner openings of the third plate are larger in diameter than the burner openings of the first plate; and wherein air-fuel premix is pulled through the premix burner, air is pulled through the cooling air box to cool the premix burner, and flames are projected from each of the burner openings of the burner face assembly for transferring heat within the warm air furnace.