Should I change out my working system to a more efficient system?

If your existing heating and cooling system is a few years old, you might be considering replacing it with a more efficient system. If your unit is less than ten years old, then installing a new system might not be the most economical option, especially if your existing unit has a warranty. On the other hand, if you plan to keep your home for a long time it might make sense to invest sooner than later.