What are the three phases for construction HVAC commissioning?

• A. Planning, design, and construction
• B. Construction, acceptance, and post-acceptance
• C. Commissioning, validation, and handover
• D. Initiation, execution, and completion

Answer: (B)

The main idea is that construction HVAC commissioning follows three distinct phases that align with the lifecycle of the installed system: during construction, the focus is on preparing the system for testing and ensuring installation work is ready for validation; in the acceptance phase, formal testing and verification of performance are conducted to confirm the system meets design intent and all deficiencies are resolved; and in the post-acceptance phase, the system operates in real conditions after formal acceptance, with seasonal checks, ongoing performance monitoring, and closeout activities such as training and warranty tracking. This sequence reflects moving from installation readiness to formal validation, then to real-world operation and long-term performance. The other options describe broader project phases or combine elements that aren’t the typical three-phase commissioning lifecycle.