Commercial and Residential Real Estate

21 Clark Street – Freshwater Group

  • Improved comfort
  • Asset renewal
  • Improved operations and maintenance
  • Maintenance cost savings

Time-sensitive infrastructure upgrades

When Tishman Speyer and the Freshwater Group decided to convert 21 Clark Street into a luxury senior living development, they turned to Ecosystem to improve the heating and cooling infrastructure. The boiler and chiller plant at the 16-story building in Brooklyn Heights, a former hotel and then Jehovah’s Witnesses residence hall, was reaching its end of useful life. In addition, because it previously supplied heat and cooling to additional buildings, it was significantly oversized for the 21 Clark Street building alone, making it inefficient and in need of a redesign. Following redevelopment into a senior living community, which has a higher energy use intensity (EUI) than other residential buildings, any inefficiency would be magnified, increasing the financial impact of wasted energy.

While the building was vacant, there was a narrow time window to install a new and efficient boiler and chiller plant without the usual challenges of managing potential tenant disruptions. Due to an aggressive redevelopment construction schedule, time was of the essence. In response, Ecosystem guaranteed not only the project cost and incentives, but the date of completion as well.

The project delivered the required asset renewal, coinciding with the existing redevelopment construction schedule, and it also provided long-term cost and operational savings thanks to the more efficient equipment and conversion from high-pressure to low-pressure steam. Increased control over heating and cooling create the optimal living conditions for tenants, required in a high-end senior living residence.

Customized Performance Measures

New boiler plant

High-efficiency chiller plant

High-pressure to low-pressure steam conversion

Project Period
Guaranteeed Incentives
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Commercial and Residential Real Estate

Real Estate leaders need results now, not just reports. Commercial real estate leaders are always looking to increase their return on investment. American cities are rapidly moving toward decarbonization. With regulations like Local Law 97 in New York City and BERDO in Boston pushing for reductions in emissions, commercial real…
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