In the current research, heat-transfer traits of spiral-coil finned minimum tube bend radius calculator heat exchangers below dehumidifying conditions are investigated. A mathematical mannequin of Ho et al. is modified by together with fin efficiency. The derivation and answer methodologies are explained intimately. The consequences of assorted inlet circumstances of fluids flowing via the heat exchanger are discussed. The agreement of the mannequin with the experimental data is passable, with a mean error of 1.2 and 4.0% for enthalpy and humidity effectivenesses, respectively.