DCM1 service 2 of 2 AC. Found multiple metal ducts in attic missing insulation, some duct have fallen From metal hanging wire causing some connection points to leak air. Supply plenum is not insulated, ducts and plenums that are not insulating are at risk of creating condensation in attic. With the lack of insulation on ducts it affect the ability to maintain hot/cool air, that is exposed to non condition attic air. Furnace flue vent is all elbows and not properly vented, this is a code violation. Due to condition of duct work, plenums and flue vent would strongly recommend replacement. We offer no charge for comfort specialist to come out and give estimate attached is AC maintenance checklist.