It’s never a good idea to mix and match a/c components of different SEER. You might save money initially by replacing only your outdoor unit with one of the new mandated 13 or higher SEER compressors and hooking it up to your 10 or 12 SEER system. However, it just doesn’t make sense in the long run. It’s like buying a brand-new stereo set and hooking it up to your old, antiquated speakers. You’re just not going to get your money’s worth in terms of comfort and efficiency. You’re better off paying a little extra up front because you’ll be saving a lot more over time. At Princeton Air, we have the expertise to help you choose the right efficiency system for your home. For a no-obligation evaluation, call us.