Memorial Hermann Health System, Houston’s largest health system, opened a new 17-floor critical care tower at its Texas Medical Center hospital.

Memorial Hermann-Texas Medical Center’s new tower, dubbed the Susan and Fayez Sarofim Pavilion, began accepting emergency room patients effective Feb. 20, according to a hospital spokesperson.

Susan and Fayez Sarofim, the billionaire behind Houston-based investment firm Fayez Sarofim & Co., donated $25 million for the project — the largest gift Memorial Hermann had ever received when it was announced in February 2018. The Sarofim Pavilion was part of a roughly $700 million renovation and expansion project at Memorial Hermann-Texas Medical Center, according to Memorial Hermann.

“The Sarofim Pavilion enables Memorial Hermann to stay ahead of the fast-growing advances in medicine, keep pace with the extraordinary growth of the greater Houston metropolitan region and, most importantly, meet the health needs of our community for years to come,” David Callender, president, and CEO of Memorial Hermann said in a news release.

The new 17-floor tower has more than 140 patient rooms; 24 operating rooms, including three hybrid ORs; a 335-seat cafeteria dubbed the Arboretum Café; and 900 new parking spots. Sarofim Pavilion also is the new home of the Red Duke Trauma Institute at Memorial Hermann-TMC — one of two adult Level 1 trauma centers in Houston.

Operations for Memorial Hermann’s air ambulance service, Life Flight, moved on top of the new tower. The new John S. Dunn Heliport is 10,000 square feet larger than the old helipad and is capable of handling the weight of a Black Hawk helicopter.

“As the Houston community is growing by leaps and bounds, the need for access to quality health care increases exponentially,” Susan Sarofim, chair of the Memorial Hermann Foundation board between 2015 and 2017, said in the release. “Memorial Hermann has stepped up to the plate to deliver a new facility with greatly increased patient capacity and state-of-the-art equipment. Fayez and I are so proud to support Memorial Hermann as the health system continues to deliver award-winning, innovative care to the Houston community.”

Construction began on the Memorial Hermann-TMC expansion in 2015. The building of Sarofim Pavilion took over 5,500 workers and 3.5 million man-hours, according to Memorial Hermann. Houston-based Vaughn Construction served as the project’s general contractor.