While most hospitals in the United States still utilize a single, massive air handling unit to serve 6-8 operating rooms at a time, the AirTUNNEL system simplifies control via utilization of a single unit per room. Smaller air handlers mean easier, quicker maintenance of units, significantly more affordable redundancy designs, less labor-intensive installations, and the elimination of complex supply-side VAV controls. Smaller air handling units run more efficiently than their larger counterparts, and are significantly more responsive.