Patent ID: 8517719

Claim:
A swirl register [ 1000 ] for use in a furnace with a windbox comprising: a first side plate [ 1110 ] being generally flat; a second side plate [ 1120 ] being generally flat; a plurality of swirl blocks [ 1150 ] having at least four walls enclosing a space, the swirl blocks [ 1150 ] spaced apart from each other and connected between the side plates [ 1110 , 1120 ] so as to cause the side plates [ 1110 , 1120 ] to be fixed generally parallel to each other, and to create a plurality of air ducts [ 1155 ] between the swirl blocks [ 1150 ]; a plurality of vane rods [ 1160 ] each having a first end and a second end, the first end of the vane rods [ 1160 ] extending generally perpendicularly through the second side plate [ 1120 ]; and a plurality of vanes [ 1130 ] each attached to the first end of each vane rod [ 1160 ] and positioned within the air ducts [ 1155 ], such that the vanes [ 1130 ] are allowed to move between a closed position in which the vanes [ 1130 ] close the air ducts [ 1155 ] and at least one open position in which the air ducts [ 1155 ] are at least partially open when the vane rods [ 1160 ] are rotated.