Heat transfer mechanisms plays vital role in functioning of any heater or making decision about best suitable heating system for your application. Majorly heat transferring is classified in 3 categories: Convection Conduction Radiation Convection: Convection is categorized as transfer of heat by moving masses of matter, as by retreats and movements of gasses or fluids, transported on by differences in width and the activity of gravity. At the point when a difference in width happens, the mass of the precise unit volume changes carrying about a change in weight. At the point when air is heated, its thickness changes in that its form gets to be less every unit volume. When air cooperates with a hot surface, it heats and becomes lighter. Because of the change in mass, the heated, lighter air climbs up. Very simple form of heat transfer by convection is the old potbellied stove, or in more advanced times, the finned tube utilized as a part of private high temp water heating