Thermal devices are tools designed to manage heat transfer, either by generating, transferring, or dissipating heat. Common examples include heaters, coolers, and thermostats. These devices are used in various applications, from maintaining comfortable indoor temperatures to preserving food and regulating industrial processes. Many thermal devices operate based on principles of thermodynamics, which is the study of heat and energy. For instance, refrigerators use a refrigeration cycle to remove heat from their interiors, while radiators distribute heat throughout a room. Understanding how these devices work helps improve energy efficiency and comfort in everyday life.