Establishments primarily engaged in manufacturing refrigeration equipment and systems and similar equipment for commercial and industrial use; complete air-conditioning units for domestic, commercial, and industrial use; and warm air furnaces. Establishments primarily engaged in manufacturing soda fountains and beer dispensing equipment and humidifiers and dehumidifiers, except portable, are also classified in this industry. Establishments primarily engaged in manufacturing household refrigerators and home and farm freezers are classified in Industry 3632, and those manufacturing electric air-space heaters and portable humidifiers and dehumidifiers are classified in Industry 3634.

• Air-conditioners, motor vehicle
• Air-conditioning and heating combination units
• Air-conditioning compressors
• Air-conditioning condensers and condensing units
• Air-conditioning units complete: domestic and industrial
• Beer dispensing equipment
• Cabinets, show and display: refrigerated
• Cases, show and display: refrigerated
• Cold drink dispensing equipment, except coin-operated
• Compressors for refrigeration and air-conditioning
• Condensers and condensing units: refrigeration and air-conditioning
• Coolers, milk and water: electric
• Counters and counter display cases, refrigerated
• Dehumidifiers, except portable: electric
• Electric warm air furnaces
• Evaporative condensers (heat transfer equipment)
• Fountains, drinking mechanically refrigerated
• Furnaces: gravity air flow
• Heat pumps, electric
• Humidifying equipment, except portable
• Ice boxes, industrial
• Ice making machinery
• Lockers, refrigerated
• Refrigeration compressors
• Refrigeration machinery and equipment, industrial
• Room coolers, portable
• Showcases, refrigerated
• Siphons, soda water
• Snow making machinery
• Soda fountains, parts, and accessories
• Tanks, soda water