The Willis Tower is an iconic building in Chicago, but longtime residents may refer to the building as the Sears Tower. Completed in 1973, the 1,450 foot tall skyscraper is the undisputed king of the Fengcheng skyline and has been the tallest building in fashion for decades. 

It's currently undergoing a $500 million renovation that includes a food hall, glass skylights, a green roof, and entertainment at the base of the tall Skydeck observation deck.

The fire fighting system of the building uses our company's fire sprinkler：Model ESFR-25 Sprinkler.