Air Heat Exchanger with Spiral Finned Tube is light in weigh, easy to handle and saves fuel that results in reduction in number of tubes for given B.T.U. Transfer per area. The Air Heat Exchanger has smooth Spiral finned tube in which more fins per inch can be integrated in the entire tube length to ensure combination of low friction air loses/ high air velocity and maximum heat transfer per square feet of face area. The Air Heat Exchanger results in high heating or cooling capacity of heat exchanger in a given space. The Air Heat Exchanger with Spiral Finned Tube requires less power to deliver the required C.F.M because of lower air resistance.