1. A louver for directing airflow in a refrigerated display case, the louver comprising: a plurality of fins positioned to define a plurality of channels therebetween through which the airflow is directed substantially in a first direction, each fin being elongated in a second direction substantially orthogonal to the first direction to define a length, each fin having an inlet end and an outlet end in a cross-section taken along the length; and an inlet profile defined by the inlet ends of the plurality of fins, the inlet profile having a width perpendicular to the second direction and being non-linear across its width and a linear outlet profile defined by the outlet ends of every other fin in the plurality of fins, with the outlet ends of the intermediate ones of the plurality of fins being recessed in the first direction relative to the linear outlet profile.

2. The louver of claim 1, wherein each of the plurality of fins increases in thickness from the inlet end to the outlet end.

3. The louver of claim 1, wherein each inlet end of the plurality of fins is offset a distance in the first direction from an adjacent inlet end, and wherein the offset distance between adjacent inlet ends decreases from a lowermost fin to an uppermost fin.

4. The louver of claim 1, wherein the inlet profile includes a substantially parabolic shape.

5. The louver of claim 1, wherein each fin includes a width extending in the first direction, the length of each fin being greater than the width of each respective fin.

6. The louver of claim 1, wherein the plurality of fins are substantially horizontal and a spaced a vertical distance apart, and wherein the vertical distance is substantially constant.

7. The louver of claim 6, wherein the inlet ends of the plurality of fins are spaced a horizontal distance apart, and wherein the horizontal distance decreases from a bottom of the louver to a top of the louver.

8. The louver of claim 1, wherein each of the plurality of channels includes an inlet and an outlet, and wherein a lowermost channel has the largest inlet and is adapted to receive the greatest portion of the airflow and an uppermost channel has the smallest inlet and is adapted to receive the least portion of the airflow to provide a tapered velocity profile to the airflow out of the louver, such that the portion of the airflow out of the uppermost channel is slower than the portion of the airflow out of the lowermost channel.

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