Heat is required to raise the temperature of the control panel, for freeze protection, reduce humidity, and prevent damage to the electronic components. As the complexity of electronics increases, the temperatures in the panel increase and it becomes even more critical to safeguard the enclosures. As a result of the higher temperatures, cooling systems are often required in many applications. When you have both heat build-up and cooling, moisture forms and causes the components to fail whether the enclosure is indoors or outdoors, insulated or un-insulated.