tRadiant heating panel systems provide high thermal comfort because of low noise level and few requiredequipments. These panels are installed on walls, floor, and roof in a scale room model. This study aims toinvestigate the performance of radiant panel heaters. Temperatures inside the room and on its walls wereexperimentally measured. A numerical model was also employed to study flow pattern inside the roomand to predict temperature distribution. The turbulent flow was solved by using RNG k-ε turbulent model.Heat transfer by radiation was modeled by using DO radiation model. The results showed that the usednumerical technique could accurately predict temperatures distribution in the room. The model was usedto study the effect of panel heater locations and sizes on the air flow and air temperature distributions.The heat transfer rates were also calculated numerically as well. It was found that the minimum heattransfer rates were achieved by using the heating panel on the floor, and the scale room model was ableto simulate the full-size room within a small percentage error about 20% especially in heater load andthe temperature distribution was about less than 1%.