This opportunity involves replacing critical end-of-life refrigeration equipment and outside control systems for two environmental chambers at the Hollings Marine Lab in Charleston, SC. The work includes replacing evaporator units, condensing units, and hot gas systems, along with upgrading associated controls. Site visits are available on Tuesdays, Wednesdays, and Thursdays from June 9-11 and June 16-18, 2026, at the lab located at 331 Ft. Johnson Rd, Charleston, SC 29412. The solicitation is unrestricted, with a NAICS code of 238220 and a small business size standard of $19.0 million. No specific budget amount or submission timeline is mentioned in the description.