<p>The work presents an investigation into the thermo-hydraulic performance (THP) of a triangular finned solar air heating duct (SAHD) featuring a wavy profiled absorber plate. A 2D CFD modeling of the unique SAHD has been done in ANSYS Fluent-2023 R1 by varying the Reynolds numbers (<i>Re</i>) from 3,500 to 16,000, using the RNG <i>k</i>-epsilon model, while considering the steady-state conditions. The SAHD consists of inlet, test, and outlet sections. The test section is considered to be 1100&#xa0;mm in length. The heat flux of 1&#xa0;kW/m² is supplied at the top plane of the receiver surface. The computational outcomes from the current work are further used to determine the thermal performance in terms of heat transfer (HT) improvements from the receiver surface to the supply air stream. The study also evaluates the associated pressure drop penalty for various design scenarios. At <i>Re</i> = 16,000, the triangular finned SAHD with a wavy profiled receiver surface achieved the highest Nusselt number of 108.7. The thermo-hydraulic enhancement factor (THEF) is evaluated for all the designs. For a wavy profiled absorber plate with triangular fins, the current study yields the highest THEF of 1.51 at <i>Re</i> = 3,500. The outcomes show that the newly proposed configuration of the SAHD improves the heat transmission from the receiver surface to the bulk air stream while keeping the pressure drop in check.</p>