This book is intended for individuals who are interested in modelling heat transfer problems both in academic and non-academic settings. The main focus is on the COMSOL Multiphysics Heat Transfer module; however, the fundamentals may be applied to other commercial packages such as MATLAB, ANSYS, and Abaqus. The content can be utilized in variety of disciplines including aerospace engineering, biomedical engineering, chemical engineering, civil engineering, electrical engineering, and mechanical engineering to name a few. The book takes a step-by-step approach, and helps navigate through fundamental concepts and questions related to set up and analysis of a heat transfer problem using COMSOL Heat Transfer Module.