Chimney Inspection Types
The Chimney Safety Institute of America (CSIA) has set three levels of chimney inspections. Each level is based on the condition of your system, how it is being used, and whether a change to the appliance or fuel type has occurred. Annual inspections matter for fireplaces and for gas and oil appliance chimneys.
Level 1 Inspection
Recommended for annual inspections when the appliance and fuel type have not changed. This includes fireplaces and many gas or oil appliance chimneys venting the same equipment as before. A level 1 inspection is a visual inspection of all readily accessible areas of the chimney structure, including the fireplace, smoke chamber, chimney exterior, and firebox.
Level 2 Inspection
Required when any changes are made to your chimney system, such as a change in fuel, installation of a new boiler, furnace, or water heater, or after a chimney fire. A level 2 inspection includes all the aspects of a level 1 inspection, as well as inspection of areas accessible from the attic, crawl space, and basement. A video scan of the flue is also conducted during a level 2 inspection, which is often where sizing problems or relining needs are identified.
Level 3 Inspection
Required when a level 1 or 2 inspection indicates there is a hidden hazard that needs further investigation. This may involve removing parts of the chimney or building structure to access concealed areas. A level 3 inspection is the most invasive and thorough type of inspection.