The Department of the Interior, through the National Park Service, is soliciting bids for the replacement of four failing HVAC units at the Hubbell Trading Post National Historic Site in Arizona. This project, identified under solicitation number 140P1525Q0037, involves the removal of existing HVAC units ranging from 1.5 to 5 tons and the installation of new units, adhering to specific guidelines outlined in the Statement of Work. The work is critical for maintaining the site's operational efficiency and comfort, with a total small business set-aside established under NAICS code 238220 for Plumbing, Heating, and Air-Conditioning Contractors. Contractors must submit sealed bids by March 6, 2025, with project completion expected within 90 days of the Notice to Proceed, and are required to comply with Davis-Bacon wage rates and provide performance and payment bonds for contracts exceeding $35,000. For further inquiries, interested parties can contact Kimberley Greist at kim_greist@nps.gov or call 202-897-7403.