Introduction Literature Review Gap Finding Objective Function Parameter and range selection Reference Setup CAD Design Prototype making Real scale setup construction/fabrication and installation Component of setup Constructed Setup Testing and Equipment Solar air heater from the major component of solar energy utilization system which absorbs the incoming solar radiations , converting it into thermal energy at the absorbing surface , in transferring the energy to a fluid flowing collector. The efficiency of flat plate solar air heater has been found to be low convective heat transfer coefficient between the absorber plate and the flowing air which increases the absorber plate temperature , leading to high heat losses to the environment resulting in low thermal efficiency of such collectors. Artificial roughness in the form of repeated ribs the most effective and economic way of improving the thermal performance of solar air heater. From the Literature review we conclude that the Multi V ribs with gap gave highest enhancement in nusselt number , however there was a very high enhancement in friction factor also. All the research work is done on Single pass SAH so we worked upon the Double pass SAH. From Literature review we also conclude that by providing turbulence ( Ribs ) the SAH is more efficient than Flat plate SAH. The major objective of this work is to find out the ways to improve effectiveness of SAH by integration of Artificial Roughness Solar Air Heater By Using Perforated Multi V Ribs with Double Pass Parallel Flow. The second objective is to come out with new shape and geometry to enhance effectiveness of SAH and compare it with other existing geometries and find out gaps and limitations of that shape. Equations Used are DITTUS BOELTER and MODIFIED BLASSIUS EQUATION. Parameters Used are Raynolds Number , Nusselt number , Friction factor and we have to find out variation in between these parameters with respect to other by plotting graphs. Anemometer Lux Meter Digital Thermometer Tilted U tube Manometer Mercury Manometer