The National Park Service requires a contractor to replace a 3-ton HVAC unit at the Nelson House Carriage House, located at Colonial National Historic Park in Yorktown, VA. The work includes providing all labor, materials, tools, and supervision as detailed in the provided specifications and drawings. A site visit is scheduled for June 9, 2026, at 9:00 AM EDT, with attendees meeting at 209 Read St, Yorktown, VA. The contract incorporates Davis-Bacon wage rates and Executive Order provisions. No budget amount or submission timeline is specified in this description.