The purpose of this study is to evaluate the performance of premixed type industrial burner with producer gas, in terms of emission, axial and radial flame temperature. The developed burner was a concentric tube type where the air supplied through a central tube, which is surrounded by another one. It having 150 kWth capacity and tested on open core downdraft type gasifier. The burner consists of swirl vane for mixing the air and producer gas, mixing tube and bluff body for flame stabilization. Swirl angle and bluff body diameter was kept constant throughout the study. Burner was evaluated with open core downdraft type gasifier. In order to understand the qualitative differences in the temperature profile and emissions during combustion of producer gas, an experiment was conducted on three-flow rate and air-fuel ratio. Study shows low NOx and CO emission at 125 Nm(3) h(-1) as compared to that of 75 and 100 Nm(3) h (1). Maximum flame temperature (753 degrees C) was recorded at of 10 cm axial and 10 mm radial distance. (C) 2011 Elsevier Ltd. All rights reserved.