Determine and perform the correct NFPA 211 inspection level (I, II, or III) for a chimney venting system

Steps

1. Confirm you are referencing the current edition of NFPA 211, Standard for Chimneys, Fireplaces, Vents, and Solid Fuel-Burning Appliances, via nfpa.org/product/nfpa-211-standard
2. Perform a Level I inspection as the baseline for any chimney in continued service with no system changes: assess readily accessible portions of the chimney, appliance connections, and structural soundness
3. Escalate to Level II when the standard's triggering conditions apply (system/appliance changes, fuel-type change, relining, or an event affecting the chimney) — include internal flue surfaces via video scanning per the standard
4. Escalate to Level III when a Level I or II inspection reveals a suspected hidden hazard that cannot be evaluated without accessing concealed areas, which may require removal of components such as the crown or an interior wall
5. Document findings against each level's defined scope so the client and any downstream contractor have a clear record of what was and was not inspected
6. Cross-reference any deficiencies found against manufacturer listings and applicable mechanical/building code before recommending repair or replacement