CBRE- Johnson Controls

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Demolition of a large cooling tower on the roof

Case Studies/Data Center Decommissioning

A data center down, and a cooling tower off the roof

When Johnson Controls retired an aging data center in Westminster, CBRE brought in Quantum for the asset recovery, the interior demolition, and the removal of a gargantuan rooftop cooling tower — finishing broom-swept.

Johnson Controls data center decommissioning in Westminster, Massachusetts by Quantum Technology

Client
CBRE (for Johnson Controls)
Location
Westminster, Massachusetts
Timeline
2 WeeksDecommission & demolition
Result
Broom-SweptDown to bare floor & walls

The Challenge

An aging data center JCI chose to retire

In April 2019, Gina Zastrow, a Project Manager for CBRE in New England, was part of an account team dedicated to Johnson Controls International (JCI) and assigned to decommission the JCI data center on Simplex Drive in Westminster, Massachusetts. The data center had exceeded its useful life, and JCI decided to demolish it.

JCI didn’t have in-house capabilities to do the demolition, so Gina hired Quantum Technology to do the asset recovery and interior demo of the data center — and the demolition of a large cooling tower on the roof.

The Johnson Controls data center before decommissioning

Our planning philosophy

“Give me six hours to chop down a tree, and I will spend the first four sharpening the ax.”

Attributed to Abraham LincolnThe project took about four months to plan — and a short, clean window to execute

The Approach

Clear roles, careful rooftop work

The work was tightly coordinated. Gina’s general contractor pulled the demo permits, did the electrical shut-off and drained the chilled water system, while Quantum provided the crane, riggers, steel roll-offs, rigging equipment, materials and labor — with CBRE facilities manager Mark Hussey providing hands-on supervision. To take down the gargantuan rooftop cooling tower, Quantum laid down material to protect the roof, then disassembled and removed the tower and its frame without causing damage. The data center was taken down to bare floor and walls — broom-swept condition.

9,000 SFRaised floor removed

From 9,000 SF of raised floor to a rooftop cooling tower, Quantum stripped the facility down to bare floor and walls.

What We Removed

From the floor to the roof

The full data center plus its rooftop cooling plant.

✓9,000 SF raised floor
✓6 Liebert chilled water units
✓1 Exide UPS & batteries
✓22 Dell server racks
✓6 Liebert condensing units
✓Rooftop cooling tower & frame
✓All feeders & conduit
✓Roof protected during tower removal

The Outcome

Planned long, executed clean

Months of planning paid off in a short, damage-free execution.

Down to broom-swept

The data center was stripped to bare floor and walls and handed back in broom-swept condition.

A tower off the roof, cleanly

The gargantuan rooftop cooling tower and its frame came down with the roof protected and undamaged.

Coordinated to the detail

Permits, shut-offs and rigging were sequenced across the GC, CBRE and Quantum — the result of four months of planning.

Your project could be next

Decommission plus rooftop demolition?

We recover the assets, strip the interior and take down rooftop plant — cranes, riggers and roof protection included — and plan every step before we start.

Skills

Posted on

October 16, 2026

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