Patent ID: 6976529

Claim:
A heat exchanger coil assembly comprising: a plurality of heat transfer tubes, the plurality of heat transfer tubes being positioned into at least one row, and the plurality of heat transfer tubes being disposed substantially parallel to one another; a plurality of fins in contact with the plurality of heat transfer tubes, the plurality of fins being disposed substantially perpendicular to the plurality of heat transfer tubes and substantially parallel to one another; each fin of the plurality of fins having a predetermined pattern for each row of heat transfer tubes, the predetermined pattern having a substantially sinusoidal shape, the predetermined pattern comprising seven discrete segments, each segment of the seven discrete segments being disposed with respect to a predefined reference shape; and wherein, at least one segment of the seven discrete segments is disposed at an offset of a first distance from the predefined reference shape and at least one other segment of the seven discrete segments is disposed at an offset of a second distance greater than the first distance from the predefined reference shape.