Consequently, the brainstorming sessions were conducted to identify the major critical factor that makes an impact on the shell and heat exchanger effectiveness. It is clear that, the convective heat transfer area is less and identifies the best solutions for improving the convective heat transfer area were gathered through brainstorming sessions. Subsequently, various solutions were identified namely, increase in volume of the shell, increase in surface area of the tube, decrease in the flue gas velocity [3] and increase in a number of passes. The strict investigation reveals unanimously that, increase in surface area of the tube by implementing fins over bare tubes. This implementation shows that, the improvement on overall efficiency of the furnace by enhancing the effectiveness of shell and tube heat exchanger