The purpose of this work is to develop a mathematical model that describes the steady state behavior of a pusher type slab reheating furnace, and to compare the calculated results with experimental results found from literature. Numerical solutions for a 3‐zone pusher type heating furnace were obtained and the results agree closely with experimental values obtained by other investigators. It has been found that the size of the subzones can not be too large, otherwise significant deviations between calculated and experimental results will occur. Close agreement between calculated and experimental results justifies the validity of the model developed in this work.