Abstract
<jats:p>There is an ever-increasing demand to a device a system for drying cultivated crops in remote areas at a cheaper cost. Solar air heaters (SAH) have been satisfying this need for the past few years and different models have been developed to improve its efficiency. The increase of global warming due to fossil fuel consumption extent can be reduced. In addition to agricultural sector, SAH has been finding its application in power plants and processing industries for drying purpose and room heaters in winter season. This project deals with the fabrication and testing of an improved version of a solar air heater. The improved version has increased heattransfer area which is achieved by incorporating double pass pattern with fins on both sides. This is an existing single pass solar air heater. The absorption characteristics are improved by using a polyester coating. It is proposed to conduct a performance analysis of double pass pattern solar air heater with different inclination angles and different fin materials</jats:p>