The convection section of fired heaters consists of finned tubes to enhance heat transfer. However, finned tubes make heat transfer in the convection section of fired heaters considerably more complex. Consequently, engineers depend heavily on correlations to determine heat transfer in the convection section of fired heaters. The problem related to the use of these correlations is twofold. First, these correlations have been developed approximately forty years ago by performing wind tunnel experiments for 1" tubes and 2" tubes, after which the results have been extrapolated to accommodate for 4" tubes. Second, industry developments led to the use of 6" tubes or even 8" tubes in the convection section of fired heaters. As a result, it should be questioned if correlations still provide accurate results for these tube sizes. This study aims to validate an entirely new way of calculating heat transfer and pressure drop in the convection section of fired heaters proposed by a recently developed analytical method. In contrast to correlations, the analytical method provides insight in the working principle of fins, is in theory applicable for large tube sizes, and ultimately has the potential to design convection banks more accurately. The latter would result in a reduction of fuel consumption, and with the focus on reducing emissions to reach climate goals, this would mean a significant improvement over existing correlation methods. Numerical models based on the realizable k-epsilon turbulence model have been developed in ANSYS Fluent to be able to validate the analytical method. The values of the heat transfer and pressure drop coefficient relative to the bare tube area have been compared with the values calculated by the analytical method and the ESCOA correlation method for one tube row and for multiple tube rows to see which method resembles the results calculated by the numerical models the closest.