STAR HVAC Mastery STAR HVAC Mastery now covers heat pump commissioning procedures and refrigerant phase-down compliance—shifts driven by EPA 2024 regulations. Technicians preparing for this exam must grasp how low-GWP refrigerants perform differently in existing systems, plus the documentation requirements for retrofit installations. These regulatory pivots reshape field troubleshooting approaches.
| Exam Name | STAR HVAC Mastery |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
