Specifications include, but are not limited to: Replace the existing Rooftop Air Handling Unit with a new unit and install a new Indoor Air Handling Unit to serve the Isolation Cells as indicated on the drawings. Work includes connecting to existing BAS Controls System (BAS) and all piping and ductwork and all required accessories for a complete and functioning system.; CUTTING & PATCHING: Cutting: Cut in-place construction by sawing, drilling, breaking, chipping, grinding, and similar operations, including excavation, using methods least likely to damage elements retained or adjoining construction. If possible, review proposed procedures with original Installer; comply with original Installer's written recommendations.; 1. In general, use hand or small power tools designed for sawing and grinding, not hammering and chopping. Cut holes and slots as small as possible, neatly to size required, and with minimum disturbance of adjacent surfaces. Temporarily cover openings when not in use.; 2. Finished Surfaces: Cut or drill from the exposed or finished side into concealed surfaces.; 3. Concrete or Masonry: Cut using a cutting machine, such as an abrasive saw or a diamond-core drill.; 4. Mechanical and Electrical Services: Cut off pipe or conduit in walls or partitions to be removed. Cap, valve, or plug and seal remaining portion of pipe or conduit to prevent entrance of moisture or other foreign matter after cutting.; 5. Proceed with patching after construction operations requiring cutting are complete.; C. Patching: Patch construction by filling, repairing, refinishing, closing up, and similar operations following performance of other Work. Patch with durable seams that are as invisible as possible. Provide materials and comply with installation requirements specified in other Sections.; 1. Inspection: Where feasible, test and inspect patched areas after completion to demonstrate integrity of installation.; 2. Exposed Finishes: Restore exposed finishes of patched areas and extend finish restoration into retained adjoining construction in a manner that will eliminate evidence of patching and refinishing.; a. Clean piping, conduit, and similar features before applying paint or other finishing materials.; b. Restore damaged pipe covering to its original condition.; 3. Floors and Walls: Where walls or partitions that are removed extend one finished area into another, patch and repair floor and wall surfaces in the new space. Provide an even surface of uniform finish, color, texture, and appearance. Remove in-place floor and wall coverings and replace with new materials, if necessary, to achieve uniform color and appearance.
