160761 Lockwood BLDG. Rooftop HVAC Replacement

This solicitation calls for the in‑kind replacement of four rooftop HVAC units at the Virginia Department of Transportation’s Lockwood Building in Mechanicsville, VA. The work includes removal of existing units, replacement of roof curbs and flashing, possible structural supports, refrigerant upgrade to R454B with leak detection sensors, installation of upgraded 12‑MERV‑13 filters, integration of BACnet MSTP controls, electrical reconnections, and lightning protection system reconnections. No interior building modifications such as ductwork or VAV systems are required. • Replace four 4‑ton rooftop air‑handling units (RTUs) with new units and associated roof work. • Upgrade refrigerant system from R‑410A to R‑454B and add integral leak detection sensors. • Integrate new BACnet MSTP controls, upgrade filters to MERV 13, and handle all required electrical and lightning‑protection reconnections.