There are 3 levels of inspections. Level 1: A Level 1 chimney inspection is a minimum requirement if your fuel source, appliance or venting system has not changed. Example: you have not converted from wood to gas or you have not installed a new appliance i.e. wood stove insert, new liner etc. A level 1 inspection is recommended if you plan to use your system as you have in the past and you have had regular (yearly) maintenance on the system. What to expect during the level 1