Official definition

This U.S. industry comprises establishments primarily engaged in (1) manufacturing air-conditioning (except motor vehicle) and warm air furnace equipment and/or (2) manufacturing commercial and industrial refrigeration and freezer equipment. Illustrative Examples: Air-conditioning and warm air heating combination units manufacturing Air-conditioning compressors (except motor vehicle) manufacturing Air-conditioning condensers and condensing units manufacturing Dehumidifiers (except portable electric) manufacturing Heat pumps manufacturing Humidifying equipment (except portable) manufacturing Refrigerated counter and display cases manufacturing Refrigerated drinking fountains manufacturing Snow making machinery manufacturing Soda fountain cooling and dispensing equipment manufacturing Cross-References. Establishments primarily engaged in--