Heat exchangers are a crucial component in many industrial applications. To enhance heat transfer in a heat exchanger, fins are commonly employed. Although many types of conventional fins are available, they have limitations in terms of surface area density and compactness. Recent advancement in manufacturing technology, such as additive manufacturing or 3D printing, has led to the capability of manufacturing complex shapes and using them as fins in the heat exchangers. Among them, lattice structures have come out to be a viable option due to their high compactness. In this study, two new lattice structures are proposed and their performance is compared with conventional Simple Cubic-Body Centered Cubic (SC-BCC) lattice structure. This numerical study is carried out using OpenFOAM. Subsequently, feasibility of 3D printing of new lattice structures has been studied. The accuracy of the printed part is checked using a microscope. Lastly, a parametric study is performed on the SC-BCC and newly modelled lattice structures by varying the lattice length and porosity. The results reveal that all the lattice structures outperform the SC- BCC lattice structure in terms of heat transfer. However, they also exhibit a higher pressure drop than the SC-BCC lattice. Therefore, different lattice structures can be utilized as fins based on specific applications required. The parametric study reveals that both lattice length and porosity significantly impact the performance of the lattice structures.