• 83.00 General137
• 83.10 Ventilation29
• 83.20 Heating11
• 83.25 Automatic heater4
• 83.30 Air conditioning95
• 83.40 Air conditioning (automatic)61
• 83.55 A/C compressor29
• 83.65 Refrigeration units1
• 83.70 Auxiliary/supplementary heater36
• 83.80 Fragrance system4