The Department of Energy, through Battelle Energy Alliance, is seeking Expressions of Interest (EOI) from qualified vendors for the replacement and upgrade of HVAC systems at the Idaho National Laboratory's CFA-608 and CFA-609 facilities. The project aims to replace outdated fuel oil-powered steam boilers with electric boilers and install global building controllers to enhance integration with the site-wide network, ensuring improved environmental control and operational reliability in laboratory spaces. This initiative is critical as the existing systems are past their useful life and increasingly difficult to maintain. Interested vendors must submit their EOIs, including company details and relevant HVAC capabilities, by May 1, 2026, to Chase Egbert at Chase.Egbert@inl.gov, as only selected respondents will be invited to participate in the subsequent Request for Quote (RFQ) process.