Industrial and commercial HVAC firm,Team Mechanical Inc.(TMI) is working on a $4.5 million project for Children's Memorial Hospital's new research facility in Chicago. As part of the project, TMI and its subcontractors are installing a complex, stainless steel exhaust system to carry carcinogenic and potentially contagious bacteria from research laboratory fume hoods through central sterilization and filtration equipment. After undergoing the purification process, the sterile air is discharged from high velocity stacks at the roof of the building.