This project included the replacement of the facility's thirty year old boilers with modulating high efficiency sealed combustion condensing boilers. Multiple roof top units were replaced with high efficiency gas fired roof top units with environmentally safe refrigerant. The facilities chillers were replaced and a new switchgear room was created. Due to the facility's 24 hour operation and proximity to the airport, careful phasing and coordination with the facility and the FAA had to be maintained throughout construction.