O EF

Apparatus for lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, water cooling, freezing and sanitary purposes; lighting, heating, steam generating, cooking, refrigerating, drying, ventilating, water supply, water cooling, freezing and sanitary installations; air freezing apparatus and installations; cool rooms [refrigerating or freezing apparatus for]; deep freezing apparatus and installations; refrigerating enclosures for freezing; reverse osmosis elements for reducing the salt content of water; apparatus for heat exchange, central heating, removal of condensate, removal of exhaust and flue gases; heat exchangers for transferring heat between fluid streams; shell heat exchangers; ventilators for heat exchangers; air cooling apparatus; chiller units being parts of water cooling installations; water purification, desalination, cooling, treatment and conditioning equipment and installations; air purification, cooling, treatment and conditioning equipment and installations