Case study - Client: Panduit Corporation


Courtesy of Wahaso - Water Harvesting Solutions

Project: Rooftop rainwater to flush toilets. Panduit is a leading, world class developer and provider of innovative networking and electrical solutions. The company planned a 280,000 square foot new world headquarters building in Tinley Park, IL. (2008-2009)

Challenge: To realize energy savings and to provide a healthy workplace and planet, the company wanted to achieve Leadership in Energy and Environmental Design (LEED) Gold certification with the 5-story building. President Tom Donovan explained that the company planned “to reinforce our commitment to the environment and sustainability.” Part of that plan was to incorporate a rainwater harvesting system to support the flushing of the 60 toilets and 37 urinals in the building.

Solution: The initial rainwater harvesting system design was modeled from the Center on Halsted building project. This helped reduce engineering costs, while still allowing for the unique needs of the building. Both rainwater and groundwater from basement sump pumps are captured, filtered and then stored in two 1,000 gallon tanks housed in the basement utility area. Chlorine sterilization was selected to eliminate any pathogens and to keep the water clear.

Results: The system was installed and commissioned in 2009 and supports approximately 50% of the building’s water needs for flushing toilets and urinals.

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