I'm currently doing a research project that involves a bunch of electrical components that generate a certain amount of heat in a cast-iron explosion proof box. There is a sensor inside of the box that has a maximum operating temperature of 113 °F, and we are planning to deploy this device out in 100 °F weather. The box will be covered with a reflective tarp, so I want to neglect heating from the sun in my estimate. We may also be able to use a large industrial fan to cool the outside of the box. We are assuming that we are operating the device for 8 hours. How do I go about calculating a rough estimate of the maximum temperature inside the enclosure? I know the dimensions of the box and the maximum power loss of each of the components inside of it. Any help, even a start is appreciated! Thanks!