| Aspect | 90001 | 90002 |
|---|
| Required Certifications | HVAC Certification, EPA Certification | HVAC Certification, EPA Certification |
| Work Environment | Residential and commercial HVAC systems | Residential and commercial HVAC systems |
| Industry Usage | Commonly used in heating, ventilation, and air conditioning services | Commonly used in heating, ventilation, and air conditioning services |
Both 90001 and 90002 roles typically require similar certifications and work in comparable environments within the HVAC industry. The main difference lies in regional or employer-specific job classifications, but generally, they serve similar functions in maintaining and repairing HVAC systems.