 The goal of this study was to create a criterion equation for predicting the heat output of heat transfer from multiple pipes stacked vertically in order to determine the amount of heat being transferred from each pipe. To do so, the researchers used computational data from ANSYS Fluent Software and created a criterion equation for a single tube. They then derived criteria equations from the data they had collected and processed it mathematically. Finally, they used the least squares approximation method to calculate the criterion equations. This article was authored by Andrei Kaptur, Josef Husver, Branislav Dorek, and others.