By Jared Ebersole in Video — 23 Apr 2026

Goldman Sachs Keeps Its Headquarters Cool by Making Ice at Night

Inside Goldman Sachs' 200 West Street headquarters, cooling is not just air conditioning. It is an ice-storage strategy built around New York's energy grid.

Goldman Sachs' headquarters is a glass office tower with a secret that sounds more like a 19th-century icehouse than a modern Wall Street machine.

Every night, the building makes ice.

Not a decorative amount. Not the kind of ice hidden behind a bar. In the basement of 200 West Street, the tower's thermal storage system can make about 1.7 million pounds of ice overnight, then use that stored cold the next day to help cool one of the most demanding office buildings in New York.

Where it is

Goldman Sachs Headquarters, 200 West Street, New York, NY 10282.

The building opened around 2010 at the northwest edge of the World Trade Center site, between Battery Park City and the Hudson River. Designed by Henry Cobb of Pei Cobb Freed & Partners with Adamson Associates, it is big in the blunt corporate way: roughly 2.1 million square feet, about 740 feet tall, and built to consolidate Goldman's New York workforce into one headquarters.

Its public face is controlled and quiet. The western facade curves toward the Hudson. The lower floors hold the trading areas. The building keeps most of its drama inside, which is exactly where the cooling problem begins.

Trading floors are heat factories.

They concentrate people, monitors, lighting, networking equipment, and technical infrastructure into enormous open rooms. The point is speed, visibility, and proximity. Teams need to see one another, communicate quickly, and process information constantly. That creates a workplace where the mechanical systems are not background comfort. They are part of the building's ability to function.

A conventional office tower often pushes cold air from ceiling diffusers. Cold air drops, warm air rises, and the system works by overpowering the room until enough conditioned air reaches the people below. It is familiar, but it can be wasteful, especially in deep office floors packed with equipment.

Goldman's headquarters uses a different logic.

One of the building's environmental features is raised-floor air distribution. Instead of forcing conditioned air down from above, the system supplies air from below, closer to the occupied zone where people actually sit and work. Warm air naturally rises toward the ceiling and can be extracted higher up.

That sounds simple because the physics is simple. The engineering is not.

Raised-floor systems require careful coordination with power, data cabling, furniture, fire protection, access panels, maintenance routines, and tenant changes. But for a headquarters built around large, flexible, technology-heavy floors, the approach makes sense. Cool the human zone first. Let buoyancy help move the heat away.

The ice system solves a different problem: timing.

Electric demand is not constant across the day. Hot afternoons are expensive and stressful for the grid because offices, apartments, stores, transit systems, and data rooms all want cooling at once. A chiller running at full tilt during those hours is buying electricity when the system is under pressure.

Thermal storage shifts some of that work to the night.

Goldman's plant runs chillers during off-peak hours to freeze water in storage tanks. During the day, when the building needs cooling, the ice melts and chills water for the air-conditioning system. The building still needs mechanical equipment, pumps, controls, and cooling towers, but some of the energy-intensive cooling work has already been done while the city was sleeping.

That is why the building's basement matters as much as its facade.

AIChE described the system as one of the nation's largest thermal storage installations, with 92 storage tanks and 1.7 million pounds of ice made nightly. Fresh Meadow Mechanical, which worked on the building's mechanical systems, describes a 5,000-ton ice storage system paired with chillers and cooling towers.

The result is not magic. Ice storage does not eliminate energy use. It changes when that energy is used, reducing peak daytime demand and taking advantage of lower-cost, off-peak power. In a city where summer cooling loads can strain infrastructure, that shift can be valuable.

It also fits the building's character.

200 West Street is a headquarters designed around risk control, redundancy, and optimization. The architecture is not flamboyant from the outside, but internally it is full of systems meant to make a giant corporate machine run smoothly: wide trading floors, security, connectivity, mechanical resilience, and controlled comfort.

The irony is that one of its cleverest ideas is ancient.

Before electric refrigeration, cities harvested winter ice, packed it in insulated houses, and used it later. Goldman is doing a high-tech version of the same thing: making cold when conditions are favorable, storing it, and spending it when the day gets hot.

In a normal office tower, air conditioning is invisible until it fails.

At 200 West Street, it is part of the story of the building. The tower is not only cooled by machines. It is cooled by timing, physics, and a basement full of frozen water waiting for the workday to begin.