Efficiency Ratings Guide
SEER2 Explained for Florida Homeowners What the Rating Means and What You Need
SEER2 is the efficiency rating on every new air conditioner and heat pump sold in the U.S. from 2023 on. This guide covers SEER2 explained simply: how it is measured, why the numbers look lower than old SEER, and which rating makes sense for a Florida home.
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The Basics
What Is SEER2?
SEER2 stands for Seasonal Energy Efficiency Ratio 2. Like the original SEER, it compares the cooling a system delivers over a typical season with the electricity it uses. A higher number means less power for the same cooling.
The change took effect on January 1, 2023, when the U.S. Department of Energy updated its test procedure. The biggest difference is airflow resistance. The old test assumed very low static pressure, about 0.1 inches of water column, which is easier than what most real duct systems impose. The SEER2 test raises that to 0.5 inches, much closer to an installed system pushing air through ducts, filters and grilles.
Because the test is tougher, the same piece of equipment earns a lower number under SEER2 than it did under SEER. Nothing about the hardware changed; the ruler did.
SEER vs SEER2 at a Glance
| SEER (old) | SEER2 (current) | |
|---|---|---|
| In use | Before 2023 | January 1, 2023 onward |
| Test static pressure | About 0.1 in. water column | About 0.5 in. water column |
| Reflects real ductwork | Loosely | More closely |
| Same unit's number | Higher | Somewhat lower |
| Companion ratings | EER, HSPF | EER2, HSPF2 |
SEER2 Minimum in Florida
DOE efficiency standards are regional. Florida falls in the Southeast region, which has stricter rules for central air conditioners than northern states. These minimums apply to new equipment installed from 2023 onward.
| Equipment (split system) | Minimum for new installs in Florida |
|---|---|
| Central AC under 45,000 Btu/h (most homes) | 14.3 SEER2 |
| Central AC 45,000 Btu/h and larger | 13.8 SEER2 |
| Heat pump (national standard) | 14.3 SEER2 and 7.5 HSPF2 |
What SEER2 Rating Do I Need?
Legally, a new split AC in most Florida homes must be at least 14.3 SEER2. Practically, the right number depends on how long you plan to stay, how hard your system works, and how much you value humidity control.
Units near the minimum are usually single-stage and cost the least upfront. Moving up into two-stage and variable-speed territory raises the rating and, just as important for Florida, improves moisture removal because the system runs longer at low output. Because cooling runs for much of the year here, efficiency upgrades tend to pay back faster than in mild climates.
One caution: a high rating cannot rescue an oversized or poorly installed system. A correctly sized mid-tier unit will usually beat an oversized premium one. Our installation team sizes every system with a load calculation.
How to Find Your Current System's Rating
Check the yellow EnergyGuide label
Many outdoor units carry one listing the rated efficiency. Sun can fade it, so look closely.
Read the nameplate
The data plate on the condenser shows the model and serial number. Look the model up with the manufacturer or an industry directory.
Note the age
Older equipment was rated in SEER, not SEER2, and many units installed years ago sit at the lower end of today's scale.
Ask your technician
During a tune-up or repair visit, we can identify the rating and explain what an upgrade would change.
SEER2 and Your Electric Bill
The rating is only part of the story. Duct leaks, a clogged filter, low refrigerant or a dirty coil can drag real efficiency well below the label. If your bill has jumped, start with our page on AC-related high electric bills and our summer bill-cutting tips. Sealing leaky ducts through our duct services can help a high-SEER2 system deliver what it promises.
Before choosing a brand or tier, compare options in our Florida AC brand guide and see whether a heat pump or straight AC fits your home better.
Common Questions
SEER2 Explained for Florida Homeowners — FAQs
Why is my new AC's SEER2 number lower than my old unit's SEER?
Because the test changed, not because the new unit is worse. SEER2 is measured with much higher airflow resistance, so every system scores lower than it would have under SEER. A new 14.3 SEER2 system is roughly equivalent to a 15 SEER unit under the old method, which is more efficient than many older systems still running.
What is the SEER2 minimum in Florida?
Florida is in the DOE's Southeast region. New split-system central air conditioners under 45,000 Btu/h must be at least 14.3 SEER2, and larger ones at least 13.8 SEER2. Split heat pumps must meet 14.3 SEER2 and 7.5 HSPF2 nationwide. These rules apply to new installations, not to systems already in your home.
Do I have to replace my AC because of SEER2?
No. The standard governs new equipment. Your current system can keep running and be repaired as long as parts and refrigerant are available. SEER2 becomes relevant when you replace, because any new system must meet the minimum for your region.
What is the difference between SEER2, EER2 and HSPF2?
SEER2 measures cooling efficiency averaged over a season of varying temperatures. EER2 measures cooling efficiency at a single hot outdoor condition, which says more about peak-day performance. HSPF2 measures a heat pump's heating efficiency over a season. All three were updated with the 2023 test changes.
Is a higher SEER2 system worth it in Florida?
Often, yes, because Florida systems run so many hours that small efficiency gains add up. Higher-rated units also tend to be two-stage or variable-speed, which helps with humidity. Whether it pays off for you depends on how long you will stay, your current bills and the price difference, which we can lay out in a free estimate.
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