What Is SEER (and SEER2) in Plain Terms?
SEER stands for Seasonal Energy Efficiency Ratio. It compares the cooling an air conditioner delivers over a typical season to the electricity it uses to deliver it. A higher number means more cooling per unit of electricity. In 2023 the federal test procedure changed, and ratings are now reported as SEER2. The test is stricter, so the same equipment shows a slightly lower number under SEER2 than it did under the old SEER scale.
What Is the Minimum SEER2 Allowed in Florida Right Now?
The U.S. Department of Energy sets regional minimums, and Florida falls in the Southeast region. For split-system central air conditioners under 45,000 BTU, new systems installed after January 1, 2023 must be rated at least 14.3 SEER2, which is about 15.0 on the older SEER scale. Larger split systems, at 45,000 BTU and above, have a minimum of 13.8 SEER2. Heat pumps have their own standard of 14.3 SEER2 and 7.5 HSPF2. Packaged units follow a separate category, so ask your contractor which one applies to your equipment. These figures come from the published regional standards; see the Southeast region summary at seer2.com for the table.
In practical terms, a compliant replacement for a typical home is the floor, not a target. A contractor cannot legally install a system below the regional minimum, so the real question is how far above it you want to go.
Is a Higher SEER2 Worth It on the Space Coast?
The value of a higher rating depends mostly on run time. Cooling in Brevard, Indian River and St. Lucie counties isn't a few summer weeks; systems here run for most of the year. More hours of use gives a more efficient compressor and fan more time to make a difference, which is why efficiency tends to matter more in Florida than in cooler states. The tradeoff is simple: higher-rated equipment generally costs more up front, and the savings accumulate slowly through lower electricity use over the years you own it.
| Efficiency level | What changes | Typically a fit when |
|---|---|---|
| At the regional minimum (14.3 SEER2 for most split systems) | Meets code with the lowest efficiency allowed. Lowest equipment cost of the compliant options. | You plan to move soon, the home is used seasonally, or budget is the main limit. |
| Mid-range, above the minimum | Lower electricity use per hour of cooling. Equipment generally costs more than minimum-efficiency models. | You expect to stay in the home for years and run the AC most of the year. |
| Top-tier efficiency | Highest efficiency and often variable-speed operation, with better humidity control. Highest equipment cost. | Long-term ownership, high usage, or a household that wants steadier comfort and quieter operation. |
The table shows direction, not prices. Quotes vary with the home, and a written in-home estimate is the only way to compare actual numbers.
How Does SEER2 Interact With Sizing and Ductwork?
The label tells you how efficient the equipment is when it is sized and installed correctly. It says nothing about whether the system matches your home. An oversized unit cools the air quickly and shuts off before it has pulled much moisture out, which can leave a Florida house cool but clammy; our post on why a Florida home stays humid even with the AC running covers that effect. Leaky or poorly sealed ducts can waste a meaningful share of the cooling before it reaches a room, no matter how high the rating. Efficiency, size and ductwork should be decided together.
Coastal homes add one more variable. Salt air corrodes outdoor coils, and a high-efficiency system that fails early doesn't pay back. See how to protect an AC from salt air before you decide how much to spend on the outdoor unit.
If My Unit Uses R-22, Does That Change the Answer?
It can. Older systems that use R-22 refrigerant are typically well past 15 years old, and R-22 is no longer produced for new equipment. A major repair on one of those units, such as a compressor or coil, is usually the point to compare repair and replacement side by side. Our guide to repairing or replacing an AC in Florida walks through that math. Whatever you choose, a replacement system must meet the current minimum SEER2 listed above.
What SEER2 Would We Recommend for a Palm Bay Home?
We don't hand out a single number, because the right level depends on how long you will own the home, how many hours the system runs, the condition of your ducts, and your budget. Here is how we would approach it for most Space Coast homeowners:
- Start at the legal minimum and ask what each step up adds. Get quotes at more than one efficiency level, so you can see the real price gap instead of guessing.
- Lean higher if you plan to stay. The longer you own the home and the more the system runs, the more a higher rating has time to matter.
- Fix the basics first. A correctly sized unit with sealed ducts at a modest rating usually outperforms an oversized premium unit on leaky ducts.
- Plan for the coast. If you are near the water, ask about corrosion protection for the outdoor coil.
If you are weighing a replacement, CoolWave's team handles AC installation across Brevard, Indian River and St. Lucie counties, and a maintenance visit is a good way to get an honest read on your current system first.
Frequently Asked Questions
What's the difference between SEER and SEER2?
SEER2 is the newer test method, which measures efficiency under conditions closer to real installations. It reports a slightly lower number for the same equipment, so 14.3 SEER2 corresponds to roughly 15.0 on the older SEER scale.
Does a higher SEER2 unit really lower bills in Florida?
Directionally, yes: a more efficient unit uses less electricity for the same cooling, and a Florida system runs more hours than one up north. How much you save depends on the home, the ductwork, and the actual unit, so ask for the specific rating of any system you are quoted.
Can I still repair an R-22 system?
A system that uses R-22 refrigerant can often still be serviced, but R-22 is no longer produced for new equipment, and an older R-22 unit is usually a replacement candidate when a major repair comes up. Any replacement must meet the current minimum SEER2.
Does the minimum apply to heat pumps too?
Yes. Heat pumps have their own federal standard of 14.3 SEER2 and 7.5 HSPF2, and the same installation date applies.
Is a higher SEER2 always the better choice?
No. Correct sizing, sealed ductwork, and proper installation matter as much as the label. A high-efficiency unit that is the wrong size or connected to leaky ducts will not deliver its rating.