Complete 2 heating tune up inspection special In Lilburn. Find upstairs 19 year old furnace operating with poor duct system, no filter rack kit, evaporator coil badly rusted, worn ignition, worn flame sensor and blower not balance and making noise. System operating with no water protection in attic and furnace under-fire. Customer need consultation visit. Find downstairs 7 year old Lennox gas furnace operating with high oxygen level, and weak flame sensor. Find under system poor. Customer need consultation visit for duct system.