This U.S. Census Bureau NAICS-based industry comprises establishments primarily engaged in manufacturing air-conditioning (except motor vehicle) and warm air furnace equipment and/or manufacturing commercial and industrial refrigeration and freezer equipment.

Cross-References. Establishments primarily engaged in--

• Manufacturing heating boilers, heating stoves, floor and wall mount furnaces, and electric wall and baseboard heating units--are classified in U.S. Industry 333414, Heating Equipment (except Warm Air Furnaces) Manufacturing;
• Manufacturing portable humidifiers and dehumidifiers--are classified in U.S. Industry 335211, Electric Housewares and Household Fan Manufacturing;
• Manufacturing household refrigerators and freezers--are classified in U.S. Industry 335222, Household Refrigerator and Home Freezer Manufacturing.