It’s never a good idea to mix and match air conditioning components of different SEERs. You might save money initially by replacing your outdoor unit with a unit that has SEER of 13 (now required) or higher, and hooking it up to your 10-or-12 SEER indoor unit. However, it just doesn’t make sense in the long run. 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 and save a lot more over time. At SOS, we have the expertise to help you choose the right efficiency system for your home. For a no-obligation evaluation and FREE estimate, contact us today.