This is a combined synopsis/solicitation for the replacement of critical refrigeration equipment and outside control systems at the Hollings Marine Lab in Charleston, SC. The work is a total small business set-aside under NAICS code 238220, with a size standard of $19.0 million. A mandatory site visit is scheduled for April 14-16, 2026, at the lab's location in Charleston, and offerors must contact the specified points of contact to schedule an appointment. The scope involves replacing evaporator units, condensing units, hot gas systems, and upgrading associated controls for two Environmental Challenge Rooms. Quotes must include contact information and a CAGE code, and vendors must comply with all attached terms and conditions.