Industrial refrigeration businesses design, install and maintain refrigeration systems used in commercial and industrial settings. Their work may include cold rooms, cold stores, blast freezers, refrigerated warehouses and central plant serving food production, distribution, laboratories and other temperature-controlled processes. Systems are selected to suit the required capacity, operating conditions and temperature range. Services commonly include assessing cooling requirements, specifying equipment and controls, installing pipework and plant, commissioning systems, and carrying out inspections, servicing and repairs. Engineers may work with refrigerants such as ammonia, carbon dioxide or synthetic refrigerants, depending on the system and its application. Customers may also use these businesses to monitor performance, investigate faults, manage refrigerant leaks and improve energy efficiency.