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This is an Addendum 2 to a sealed bid solicitation issued by the University of Southern Mississippi's Procurement and Contract Services for a Heater Chiller System supporting the Oyster Hatchery and Research Center at the Gulf Coast Research Laboratory. The procurement encompasses seventeen units of aquaculture water temperature control equipment, including three low-profile drop-in water chillers (6,000 BTUH at 115V single phase), four air-cooled reversible heat pump/chiller units (identical specifications), six medium-capacity units (5 tons/60,000 BTUH at 208-240V single phase), two large-capacity units (7.5 tons/90,000 BTUH at 208-240V three phase), and two extra-large capacity units (10 tons/120,000 BTUH at 208-240V three phase). All equipment must be new, unused, current production models with titanium heat exchangers suitable for saltwater use and low-global warming potential refrigerants such as R454B or approved equivalents. Sealed bids were due Friday, March 20, 2026, at 2:00 p.m. CDT, with delivery required FOB destination to the University of Southern Mississippi. No installation is required for any equipment specified in the bid.

The addendum clarifies critical specifications for the large heat pump units designated as HP-5, specifying that four of six units require internally installed low ambient fan controllers for operation in chill mode when ambient air temperatures are between 0-55°F, with the four units designated for the Brood Stock Holding System (BSHS) and to be externally labeled accordingly. The addendum confirms that 304 stainless steel construction is sufficient for corrosion resistance, eliminating the requirement for Tropicoat Marine Coating on the condensing units. Payment terms are established at 2% discount if paid within ten days or net payment within 45 days in accordance with Mississippi law, and the University reserves the right to reject any or all bids submitted. Interested vendors should contact Millissa Weaver, Procurement Coordinator, at (228) 818-8001 for additional information.