Unless otherwise permitted, a mechanical system lawfully in existence at the time of adoption of the Mechanical Code ____.

Unless otherwise permitted, a mechanical system lawfully in existence at the time of adoption of the Mechanical Code ____.

• A. May have its use continued
• B. Must be evaluated for conformance
• C. Shall be abandoned
• D. Must be identified to meet the current code requirements

Answer: (A)

When a new Mechanical Code is adopted, systems that were lawfully installed before that adoption are allowed to continue in use. This grandfathering approach prevents the need to upgrade every older installation to meet the new code just because the code changed. The code typically requires that new work, repairs, or alterations comply with current requirements, but ongoing operation of existing, lawfully installed systems is permitted unless the authority having jurisdiction permits or requires changes for safety or other approved reasons.

When a new Mechanical Code is adopted, systems that were lawfully installed before that adoption are allowed to continue in use. This grandfathering approach prevents the need to upgrade every older installation to meet the new code just because the code changed. The code typically requires that new work, repairs, or alterations comply with current requirements, but ongoing operation of existing, lawfully installed systems is permitted unless the authority having jurisdiction permits or requires changes for safety or other approved reasons.