My home had a 20 year old system of yours. In the past, I had it serviced and was extremely satisfied. I asked your service man this time to inform me if I needed to repair or replace my unit. The two men who came to my home were very informative and understanding....I had recent surgery and could lift or move anything. I had just had rugs cleaned and items were in the way for do their. Job. They kindly moved what was needed to examine my unit. They discussed the efficiency that my current unit operated at and what it would be with a new unit. I felt no pressure but decided to update my 20 year old unit and have the recommended unit installed and to take advantage of your maintenance plan to assure my unit is properly care for in the future.