100 Pearl St. in Hartford. Photo courtesy of Google Maps.

The Hartford HealthCare hospital system will be the new occupants of six floors at downtown Hartford’s 100 Pearl St. tower following the signing of one of the city’s biggest commercial leases in recent months.

System President and CEO Jeffrey Flaks called the move “a major investment in our community” in a statement, and the company indicated it would be part of a large expansion of its presence in the city, but declined to release further details about the timing or about its future space requirements.

“This space in the heart of downtown Hartford will be used to drive innovation, create greater efficiencies, and better meet the needs of people statewide who depend on our growing system of care,” Flaks’ statement said. “While many details are still being finalized, we are proud of this transformative project for the City of Hartford. We are planning a major announcement on the impact we expect this, and other emerging initiatives, will have in our capital city.”

Hartford HealthCare was represented internally in the deal by Thomas Vaccarelli, vice president of facilities, construction and real estate. The company has engaged New York- and San Francisco-based MBH Architecture and Farmington-based FIP Construction to design and build its offices.