Hatzel & Buehler began their relationship with Chester County Hospital in 2012, with the construction of a new 93,000 square foot patient tower. As Chester County Hospital celebrates 125 years of service, it is also embarking on its largest expansion. When the expansion is completed, the hospital will gain 250,000 square feet of space, including a beautiful new main entrance and Emergency Department with ten additional rooms and support space. In addition, fifteen modern/hybrid operating rooms, four high-tech labs, areas for non-invasive cardiology and pre-admission space will all be included in the new construction. The new space will be supported with a new 35kV electrical service distribution system that will back feed the hospital’s existing electrical distribution and supply power to a new 1500kVA duel ended substation. This will be backed up by a new 2Meg diesel generator that will take care of the critical and life safety power for this expansion. For smooth transition of power Hatzel & Buehler will be adding a 500kW Flywheel UPS to the critical isolation panels in the ORs.