When you replace a central air conditioner or heat pump, the equipment has to meet federal minimum efficiency standards set by the U.S. Department of Energy (DOE). The current minimums took effect on January 1, 2023, and they changed both the required ratings and how those ratings are measured.
SEER2: the current rating
SEER stands for seasonal energy efficiency ratio. It rates how much cooling a system delivers for the electricity it uses, and a higher number means a more efficient system. Since 2023, equipment is tested under a newer procedure and rated in SEER2. SEER2 numbers read lower than the old SEER numbers for the same equipment, so a 13.4 SEER2 system performs about like a 14 SEER system under the old method. Compare SEER2 to SEER2 when you shop.
Minimums depend on where you live
The DOE sets different minimums by region. Kansas is in the northern region, where split-system central air conditioners must be at least 13.4 SEER2. The southern regions have higher minimums for most sizes. Split-system heat pumps must be at least 14.3 SEER2 and 7.5 HSPF2 (the heating-efficiency rating) in every region.
What it means for you
- An existing system that was legal when installed can stay in service. The standards apply to new equipment.
- When you replace a system, the new equipment must meet the minimums for its region. Many models exceed them.
- A higher SEER2 rating generally lowers operating cost, so it is worth comparing models for the system you plan to keep a long time.
- Rating is not the only factor. Proper sizing, ductwork condition and installation quality affect how efficient a system is in your home.
A note on refrigerants
Manufacturers have been moving new residential equipment away from R-410A refrigerant toward lower-impact A2L refrigerants such as R-454B. Ask which refrigerant a system uses and what service it will need.
Replacing a system in Wichita
Midwest Mechanical can help you compare efficiency ratings, size the equipment to your home and explain your options. See our AC replacement and AC installation pages, or call (316) 226-8859 or contact us online.
Sources: U.S. Department of Energy, 2023 Central Air Conditioner Standards FAQ; U.S. EPA, Technology Transitions HFC Restrictions by Sector.

We have partnered with GoodLeap to offer flexible payment options for your project. GoodLeap uses a soft credit check until funding and the highest score from all 3 bureaus to see if you qualify. It also takes just a few minutes to get started.




