Sign 2 comfort control cci maintenance plan. Complete 2 heating maintenance in Lilburn. Change both filter, check safety and operations. Find upstairs 3 year old Amana gas furnace operating with in manufacturer spec. Suggest water protection for upstairs system in attic. Find downstairs 15 year old heil gas furnace operating with in manufacturer spec. Minor ware on ignition and need to keep check. Gas line not up to code and no water protection. Find customer have 17 year old hot water tank, suggest to upgrade tank due to age.