I am a highly skilled home service professional. I recently completed a furnace replacement for a customer. The furnace was 20 years old and showing its age with lots of rust in the burner compartment and heat exchanger. The customer was not looking to replace the furnace this time, but I recommended that it be updated due to the agent's condition. The furnace is still functioning properly at this time, but I did recommend that it be updated due to the agent's condition.