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Fin and tube heat exchangers are widely used in the chemical industry, power plants, automotive industry, refrigeration, and air conditioning. An improvement of fin and tube heat exchanger performance needs to be done to obtain competitive heat exchanger products in the market. This performance can be enhanced by increasing the value of the convection heat transfer coefficient. One way is to generate longitudinal vortex using the vortex generator. Therefore, the purpose of this study is to determine the effect of the use of vortex generators on increasing heat transfer coefficients and pressure losses of air flow through heated tubes in a rectangular channel. The experimental method is to compare the use of vortex generators with no vortex generators (baseline), vortex generators include concave delta winglet pair vortex generators (CDWP VGs) and delta winglet pair vortex generators (DWP VGs) with angles of attack was set at 15o and airflow velocity was set from 0.4 m/s to 2.0 m/s. Inlet, outlet, and surface tube temperatures were measured using thermocouples. From the results of the study, it was found that the use of vortex generators increases the convection heat transfer coefficient and pressure loss compared to those without vortex generators. When using DWP and CDWP VGs, convection heat transfer coefficient is increased by 44.91% and 84.68%, respectively, at Re = 11,101 to 11,272 compared to that without vortex generators and pressure losses increased by 3.51% and 8.20%.