01Three levels, defined by how much gets examined
NFPA 211 does not leave “inspection” as a vague term: it defines three levels, and which one applies depends on the situation, not on preference.
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A Level 1 is a visual check of everything reachable without tools, appropriate for a chimney under continued, ordinary use with no reason to suspect hidden damage. It is the inspection bundled into a standard sweep. A Level 2 adds a video camera run down the full interior of the flue and is specifically called for at a change of ownership, after an appliance swap, or after any event that might have caused damage a visual check cannot see (an earthquake, a chimney fire, a lightning strike). A Level 3 goes further still, removing concealed building components when a Level 2 finds something that needs a closer look, and it is uncommon outside of a real structural concern.

