Okay, but how do I estimate the inside cabinet temperature with given heat sources and airflow?

To estimate the inside temperature, quantify the heat you generate and compare it with what the cabinet can remove through ventilation. Start by listing every heat source in the cabinet (the router and any connected devices) and capture each device’s power draw in watts. Note the ambient site temperature and the cabinet’s ventilation characteristics (openings, gaps, and any fans). Then apply a simple heat-balance approach or use a temperature logger to see how hot the inside gets under typical load. If you have a rough rule of thumb for your enclosure, you can estimate the temperature rise by combining the heat load with the cabinet’s airflow. The most practical method is to place a small temperature sensor inside the cabinet and monitor during peak operation, so you can tell if you’re staying below the router’s operating temperature range. If the measured temperature or rise is too high, you’ll likely need to improve cooling, adjust the layout to improve airflow, or consider a larger cabinet. Comset can review the current cabinet layout and advise on changes for cooling, grounding or easier access.