The present invention is directed towards a heat exchanger incorporating integral fin and turbulence enhancement features which are designed to improve hydraulic efficiency and heat transfer rates. The heat exchanger device comprises a top surface, a bottom surface, a front surface, a back surface, and two opposing side surfaces to define a main body unit. The heat exchanger device further comprises a plurality of laminar elements, or plates, having surface configurations to provide for to fluid flow therein. In order to increase heat transfer rates through the mixing of fluid, the heat exchanger device in accordance with the present invention contains features which enhance and increase flow turbulence and heat transfer surface area, referred to as out-of-plane structures. In one embodiment, the heat exchanger device contains features which form vertical out-of-plane structures. Alternatively, the heat exchanger device contains features which form horizontal out-of-plane structures.