2825 Manufacture of non-domestic cooling and ventilation equipment

282511 Heat exchange units and machinery for liquefying air or other gases 282512 Air conditioning machines 282513 Refrigeration and freezing equipment and heat pumps, except household type equipment 282514 Machinery and apparatus for filtering or purifying gases n.e.c. 282520 Fans, other than table, floor, wall, window, ceiling or roof fans 282530 Parts of refrigeration and freezing equipment and heat pumps