Complete 2 heating tune up inspection special in Decatur. Find Lennox Airhandler operating with badly rusted evaporator coil. Customer concern for noise in bedroom vent. Check for noise and not noise at Airhandler. Tighten vent for bedroom to help reduce noise. Suggest air purifier system to improve air quality and Oder from older evaporator coil and build up. Find downstairs furnace operating but under-fire and not efficiency, find blower capacitor not with in manufacturer spec. Suggest to do combustion calibration service and suggest to replace capacitor.