We have seen systems that need to be changed at 12 years old and some that are running strong at 17 years old. The name brand will have a very small impact on equipment longevity. One of the main attributing factors to a systems long life is cleanliness and being properly maintained. Clear Comfort will properly maintain and repair any name brand system. We not only will prolong your systems life but also keep it running at its designed efficiency. We can advise you on equipment that will best fit your needs and give you an evaluation on which equipment is performing better to date.