Do I Need to Reline My Chimney Now That I Removed the Old Furnace?

Level I Inspection

• The first level of inspection is limited to areas of the chimney that can be reached and inspected without a ladder or special tools. When an old furnace is replaced by one similar in type, and venting requirements have not changed, a cursory inspection of appliance connections and a positive determination of the absence of flue obstruction is all that is required. The chimney must be relined only if damage warrants a fix.

Level II Inspection

• If you have replaced an old furnace with a high-efficiency model or have converted to a new fuel source, a level II inspection is needed. All conditions of the level I inspection must be met. In addition, attic, crawlspace and rooftop accessible areas of the chimney must be examined. Level II inspections may necessitate the use of ladders and simple tools. If damage is found that could pose a safety hazard, a chimney relining may need to be done.

Level III Inspection

• If a hazard is suspected as the result of a level I or II inspection, a level III inspection may be required. This process may involve the removal of some of the chimney to better assess what fixes may be needed. Level III inspections often are triggered by incorrectly installed heating appliances or damage to a chimney caused by a windstorm or other climactic event. A chimney liner may be required if the inspection process mandates a fix.

Chimney Liner Options

• Older homes may have clay liners that have deteriorated due to moisture and creosote accumulation. If repair is warranted, you may choose from one of three options: A stack that exhibits considerable deterioration, both inside and out, may require a complete chimney rebuild. An old, cracked, clay liner may be replaced with one built of new concrete walls. If your new furnace mandates the use of a stainless steel liner, you can install either a flexible or rigid steel model.