Arrived at customers residence and was greeted by the customer and was led to the thermostat and it is functioning properly at this time. Inspected 20x25x4 media filter and it is dirty and replaced media filter at this time. Inspected #35 water panel filter in humidifier and itmis clean at this time. Tape and ductwork joints are tight and neat and without any visible defects or air leaks at this time. Inspected automatic dampers and they are all functioning properly at this time. Inspected 3 in. flue pipes and they are primed ,glued and pitched properly at this time. Inspected fan powered humidifier and it is functioning properly at this time.inspected emergency shut off switch and it is functioning -to-early at this time. Inspected Activtek Eviromental Conditioning System and it is functioning properly at this time. Inspected humidistat and it is functioning properly at this time. Inspected Aprilaire zoning control board and it is functioning properly at this time. Refrigerant line