We present a novel indicator for the effectiveness of longitudinal. convecting-radiating fins to dissipate heat. Starting from an analysis of the properties of the entropy rate of the steady state. we show how it is possible to assess the efficiency of such devices by looking at the amount of entropy produced in the heat transfer process. https://www.soiebiologique.com/best-save-Scarecrow-Guide-Wilds-of-Eldraine-top-buy/