Identify exactly which real-world conditions require a NFPA 211 Level II chimney inspection

Steps

1. Reference the current edition of NFPA 211 for the defined Level II triggering conditions rather than relying on secondary summaries
2. Confirm property-transfer triggers: NFPA 211 calls for a Level II inspection at the sale or transfer of real property
3. Confirm appliance/system-change triggers: a change in fuel type, a change in the flue's shape or lining material (e.g., relining), or addition/replacement of an appliance with a dissimilar type, input rating, or efficiency
4. Confirm event-based triggers: an operational malfunction or an external event (chimney fire, building fire, seismic event, severe weather) reasonably likely to have caused damage
5. Scope the Level II inspection to include everything in Level I plus accessible interior spaces (attic, crawlspace, basement) and an internal video scan of all flue liners
6. Provide the client a written report distinguishing the Level II trigger reason, since insurers and buyers often require that documentation