Customer has 15 y/o Lennox system that operates for main level that is not cooling properly due to damaged return ductwork. Dirty filter. Numerous failing components. Dirty condenser coils. Dirty evaporator coil. Customer also has 17 y/o Lennox system that operates for upper level that was not operating due to low batteries. Replaced customer supplied batteries. Noticed several issues and failing components as well for system. Dirty condenser coils. Overall condition of both systems are poor. Advised customer to seek options for system upgrades. Customer declined at this time.