As the dawn breaks, every day we come across some new technology or development in the field of science. The scope of this wide spectrum in which humans are encouraged to find a better substitute for the older technologies has made so many advancements to make day-today life easy. One such major point of focus today is to replace the electricity with the non conventional energy resourceharvesting methods. In the same way, heat can be a good source to produce power from it. The principle of Seebeck effect can be used for such applications. It was first described as long ago in 1820 by a German physicist-Thomas Seebeck. Two metals with a common contact point, where the potential is developed due to the temperature difference in the other two ends of metals, is all about Seebeck effect. Peltier module also follows the same principle. We have used TEC-12706 in our experimentations to know ways to optimise the use of a Peltier module. This review paper shows that heat harvested from different heat sources generate different amount of voltages and overall power. Experimentations also showed that using different ways to extract heat from the other side of the module made output voltage to vary accordingly.