Official classification context
Industry overview This class comprises establishments that do not come under general piping work and are primarily engaged in installing co oling and heating equipment, temperature and humidity regulating devices, ventilation devices, air-conditioning devices, drying devices, freezing and refrigerating devices, ice-making devices, cooling towers and other work.
Major group context This Major group comprises establishments primarily engaged in direct contracts with the orderers for completing electric structures, telecommunication signal facilities, air -conditioning equipment, water supply -drainage with sanitary equipment, elevator systems, and other machinery and equipment, or the establishments engaged in comple ting similar work by self -construction (construction for the establishment itself) as well as those engaged in subcontracting installation work as a part of work for these machinery and equipment.