Required with chimney sweeping; routine evaluations of venting system; replacing an appliance with a similar appliance. Limited to readily accessible portions of the venting system and accessible portions of the connected appliances.
Level II Inspection:
Required when a Level I inspection reveals the area for a more detailed inspection. Recommended when: An appliance is being replaced with a "dissimilar type, input rating, or efficiency. Prior to relining a flue, upon the sale or transfer of a property, after an event likely to have caused damage, a fire, operating malfunction, or weather event.
According to the NFPA (National Fire Protection Association) 211, "If the flue liner in a chimney has softened, cracked, or otherwise deteriorated so that it no longer has the continued ability to contain the products of combustion (heat, moisture, creosote, and flue gases), it shall either be removed and replaced, repaired or relined with a listed liner system."?