A system for determining and displaying in a graphical user interface one or more of air temperature, pressure, or velocity in an information technology (IT) room including an IT equipment rack comprises a processor configured to receive an input comprising airflow resistance parameters through the rack, an IT equipment airflow parameter, a heat-dissipation parameter, an external pressure, and an external temperature, to run the input through a flow-network solver that solves for airflow velocities through at least one face of the rack and a rack air outflow temperature based on the input, provide an output including the airflow velocities and the rack air outflow temperature, and generate, based on the output, a display in a graphical user interface of the system illustrating one or more of air temperatures, air pressures, or airflow velocities within the IT room.