A heat exchanger is provided including a fluidly coupled first heat exchanger slab and second heat exchanger slab. The first heat exchanger slab includes at least one first tube segment and the second heat exchanger slab includes at least one second tube segment. The second heat exchanger slab is arranged downstream from the first heat exchanger slab relative to airflow. A plurality of first fins having a first fin density extends from the first heat exchanger slab. A plurality of second fins having a second fin density extends from the second heat exchanger slab. The first fin density is different than the second fin density.
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