This is a Sources Sought Notice for market research to determine the availability of capable small businesses for a potential future contract. The anticipated contract is a Facility Support FFP/IDIQ for HVAC maintenance and repair services at Naval Submarine Base New London in Groton, Connecticut, with a total performance period not to exceed 60 months. The work involves facility investment for building systems, including HVAC, boilers, plumbing, and related components. Interested small businesses must submit a capabilities package demonstrating relevant experience with contracts of similar size, specifically citing work on projects with a yearly value of at least $1.5 million for recurring services. The government will use responses to decide if the acquisition will be set aside for small businesses.