Official classification context
Industry overview This class comprises establishments primarily engaged in executing all w ork related to cooling 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 thermotic facilities and water supply & drainage and sanitation equipment installation.
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.