The U.S. Embassy in Mexico City requires a contractor to remove and replace a rooftop HVAC unit and three air handling units at a government residential property in Mexico City. The project aims to improve energy efficiency, operational reliability, environmental compliance, and long-term serviceability. A site visit will be scheduled, with details provided in the solicitation once it is launched. Offerors must be registered in SAM.gov with an active account at the time of proposal submission to be considered responsive. No budget amount or specific submission timeline is mentioned in this description.