| HVAC/R | Heating, Ventilation, Air Conditioning, and Refrigeration 
| Others |
| HVACR | Heating ventilating air conditioning and refrigeration
| Others |
| HVACR | Heating Ventilating And Air Conditioning Refrigeration
| Others |
| HVACR | Heating Ventilation A C and Refrigeration
| Others |
| HVACR | Heating Ventilation Air Conditioners and Refrigeration
| Others |
| HVACR | Heating Ventilation Air Conditioning and Refrigeration
| Others |
| HVACR | Heating Ventilation Air Conditioning Refrigeration
| Others |