Professional Chimney Cleaners NFPA 211 is the usual code upon which certified chimney sweeps base their services and CSIA Certified Chimney Sweeps are examined to those three ranges of inspection. Always ask for the extent of inspection that you believe can be most applicable in your chimney and venting system. Each degree of inspection covers particular items dependent on the person, equipment, and venting system. Level three – A Level 3 inspection is carried out when a hidden hazard is suspected that can not be uncovered without accessing concealed areas of the chimney assembly and flue. This inspection will include all the pieces from the Level 1 and a couple of inspections, plus an analysis of the chimney building and the concealed portions of the chimney and flue. Level 3 inspections are usually mandatory when assessing damage that has occurred to the chimney or to the constructing structure. Level 2 – If you’ve bought a new home heating appliance, made a change to any existing equipment that’s vented by way of your chimney, or for those who suspect that there’s injury to your chimney, a Level 2 inspection must be carried out. A Level 2 inspection consists of all the things in a Level 1 inspection plus an evaluation of any accessible parts of attics, crawl areas and basements. Your technician will even do an inside chimney video inspection of your chimney during a Level 2 inspection.