In ventilation standards, the term informative appendix refers to which of the following?

• A. Appendices that describe test procedures only.
• B. Appendices that are mandatory and enforceable.
• C. Appendices that provide useful information but are not part of the standard.
• D. Appendices that define enforceable minimums.

Answer: (C)

Informative appendices are non-binding guidance within ventilation standards. They provide useful information, background, examples, or rationale to help you understand and implement the standard, but they are not part of the enforceable requirements. Because of that, they aren’t mandatory to follow and cannot establish enforceable minimums or testing procedures that must be met for compliance. You may consult informative appendices for context, but compliance rests on the normative parts of the standard, not the informative sections.