Periodic re-commissioning is described as identical to re-commissioning except for what circumstance?

• A. It occurs when the HVAC systems in a building were not commissioned when new, and are being commissioned for the first time
• B. It involves retrofitting energy-saving equipment
• C. It is performed only on newly constructed buildings
• D. It replaces initial commissioning

Answer: (A)

Periodic re-commissioning uses the same process and goals as re-commissioning—testing, tuning, and adjusting systems to meet intended performance—but applied when the HVAC systems were never commissioned when the building was new. In that case, you’re performing the first-time commissioning of those systems, which is what sets periodic re-commissioning apart. The other options describe activities or scopes that don’t define this scenario: retrofitting equipment, only applying to newly constructed buildings, or replacing initial commissioning.