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1-Year Unlimited Access

GBES UNLIMITED - Access Everything


This offering includes a full year (12 months) of unlimited access to all GBES study tools AND continuing education for 9 different career-advancing credentials.

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Terms & Conditions


Guide to Commissioning for Existing Buildings

No Expiration


This course provides an overview of the retro-commissioning process and discusses the benefits and costs of providing retro-commissioning services within commercial buildings. This course will provide valuable assistance to building owners and operators in understanding the retro-commissioning process and identifying the best applications in their buildings.

Learning Objectives

  • Define the term retrocommissioning
  • Explain the commissioning process
  • Describe several examples of how retrocommissioning has improved building performance and saved building owners money
  • Cover typical processes and forms that a commissioning authority might use

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