I arrived at our clients home for a duct cleaning estimate. I proceeded into the attic and found all 3 attic units all from 2003. I opened the cabinets to all 3 units to assess the level of dust accumulated in the duct work and also on the blower motors. The upstairs and main area unit motors have evidence of oil leaking from the motors and a significant amount of dust accumulated on them. I included removal and cleaning the blower wheels to the estimate for all 3 systems. Our client is aware that the motors may fail after the cleaning due to the age and stress caused by the dust build up.