The VA Pittsburgh Healthcare System requires a modular inhalation exposure system for controlled studies involving aerosolized particulates, vapors, and gaseous agents, supporting both in vivo animal models and in vitro cellular systems. The system must include a base toxicant exposure chamber, various aerosol and vapor generators, a cell exposure system, and control chambers, along with installation, training, and an annual service contract. Delivery and installation must be completed 8-12 weeks after award, with performance at the VA Pittsburgh Healthcare System Research Office Building in Pittsburgh, PA. No budget amount is specified in the description. This opportunity is for a contractor to construct, install, and validate the system, providing on-site training and ongoing maintenance.