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Prisons are perhaps the most resource-intensive institutional infrastructures. This is largely a function of the unique nature of the building typology, which requires continuous operation, high levels of lighting (for security) and water consumption (for the inmates). Moreover, prison cells that contain toilet fixtures are required to have exhaust venting, increasing heating and cooling loads and costs. With the number of prisons on the rise in the US, new green initiatives are being explored to offset these resource hogs.