The project consisted of replacing nine two pipe air handlers with water source heat pumps, installing a new heat pump loop including new pumps, a plate and frame heat exchanger, piping into the existing cooling tower piping, replacing two existing two pipe air handlers with four pipe air handers, installing a new hot water heating piping loop and air handling equipment, adding a new water cooled chiller and boiler, installing new stainless steel flue pipe from the lower level mechanical room out through the roof to a new natatorium roof mounted unit, new duct-sox installed in the pool, separating the ice rink chiller plant from the central plant, and installing a new DDC control system. All of this work was performed while the building remained in operation.