The Department of Defense, specifically the Department of the Air Force, is seeking vendors capable of performing an upgrade to Honeywell HVAC building controls at Ellsworth Air Force Base in South Dakota. This sources sought announcement is intended for market research to determine the availability of qualified firms that can meet the requirements outlined in the attached Statement of Work (SOW). The selected vendors will play a crucial role in enhancing the efficiency and functionality of HVAC systems, which are vital for maintaining optimal building environments. Interested parties must submit a capabilities package by 1:00 PM MST on March 31, 2025, to Nicholas Harold at nicholas.harold@us.af.mil, as no proposals or cost data are to be submitted at this stage.