A burner assembly for use in a warm air furnace. The burner assembly has a cooling
air box for receiving air and a premix burner for receiving air-fuel premix positioned
within and spaced apart from the cooling air box. The burner assembly also has
a burner face assembly defining a front end of the premix burner. The burner face
assembly includes a first plate positioned on top of a second plate, and a third
plate positioned underneath the second plate. Each plate of the burner face assembly
has a plurality of aligned burner openings. In the burner assembly, 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.
