The need for energy in industries is growing daily, with space heating and process applications appearing to be the main uses of energy. Solar technology, especially air collector, contribute a lot in meeting these energy demands and are widely being used for various applications. Any improvement in the performance of such collectors will contribute a lot in terms of energy that is conserved. Solar air collector generally comprises of rectangular cross section having two separate sections having upper and lower section in which upper portion is exposed to solar radiation. The study's findings show that rectangular channel of the upper surface is made efficient by adding artificial roughness on it which is used to increase the heat transfer coefficient of the flowing fluid as well as improve the overall performance of the system. The configuration with artificial roughness shows a remarkable enhancement in terms of thermal performance showing a maximum improvement over the plain configuration.