Certified HVAC Designer (CHD) The CHD now emphasizes variable refrigerant flow (VRF) system design and updated energy code compliance, reflecting 2023 standards across North America. Candidates must grasp heat load calculations under modern efficiency requirements and ductless technology integration—areas that weren’t weighted this heavily in previous iterations of the exam.
| Exam Name | Certified HVAC Designer |
| Exam Code | CHD |
| Format | PDF & Practice Test Engine |
| Target Year | 2026 Updated |
| Features | 100% Verified Q&As |
