What is a good SEER rating?
What SEER means, the new SEER2 minimums, and how high is worth it in Texas.
By The T.A.P. Team · April 2024 · 6 min read
SEER (Seasonal Energy Efficiency Ratio) measures how efficiently an AC turns electricity into cooling — higher is more efficient. Since 2023, new systems in the South must be at least 14.3 SEER2 (the updated test standard), and a "good" efficient system today lands around 16 to 18 SEER2. Because Texas runs its AC so many hours a year, a higher SEER pays back faster here than almost anywhere.
- SEER = cooling efficiency (higher = more efficient)
- Southern minimum: 14.3 SEER2 (2023+)
- Good, efficient range: 16–18 SEER2
- Premium: 18–21+ SEER2
- Higher SEER pays off fastest in hot climates like Texas
What SEER (and SEER2) actually mean
SEER is cooling output over a season divided by the energy used — like MPG for your AC. As of 2023 the industry switched to SEER2, a more realistic test, and raised minimums. In the southern US (including Texas), new split systems must be at least 14.3 SEER2. Higher numbers mean lower running costs for the same cooling.
What counts as "good"
Entry-level new systems sit at the 14.3–15 SEER2 minimum. A solid, efficient choice for most Texas homes is 16–18 SEER2, and premium variable-speed systems run 18–21+. The higher tiers add comfort features — variable-speed operation, better humidity control — on top of efficiency.
How SEER affects your bill
Going from an old 10 SEER unit to a 16 SEER2 system can cut cooling energy meaningfully — often 30–40% — which is real money over a five-month Texas cooling season. The jump from, say, 16 to 20 SEER2 saves less in absolute terms, so there's a point of diminishing returns worth weighing against the price.
When higher SEER is worth it
The more hours you run the AC, the faster a high SEER pays back — and Texas runs a lot of hours, so efficiency matters more here than up north. If you'll stay in the home long-term, the higher tier often pays for itself; if you'll move soon, a mid-range SEER may be the smarter buy. Pair it with correct sizing to actually get the rated efficiency.
| SEER2 rating | What it means |
|---|---|
| 14.3 SEER2 | New Southern minimum (2023+) |
| 15–16 SEER2 | Solid efficiency |
| 16–18 SEER2 | Good, efficient choice |
| 18–21+ SEER2 | Premium / variable-speed |
| Old 10 SEER | Typical pre-2006 system |
A high-SEER system only delivers its rating if it's correctly sized and properly installed — right charge, good airflow, sealed ducts. A premium unit installed poorly underperforms a mid-range unit installed well. Get the fundamentals right first, then choose the SEER tier that fits how long you'll stay.
Why SEER matters more in Texas
With a cooling season that runs spring into fall, DFW homes rack up far more AC hours than homes up north, so each point of SEER translates into more real-world savings here. When we quote systems across Frisco, Garland, and Allen, we weigh the SEER tier against your bills and how long you plan to stay.
The short version
- SEER measures cooling efficiency — higher means lower running costs.
- New systems in the South must be at least 14.3 SEER2 (2023 standard).
- A good, efficient choice for Texas is around 16–18 SEER2.
- Upgrading from an old 10 SEER unit can cut cooling energy 30–40%.
- Higher SEER pays back fastest in hot climates that run the AC a lot — like Texas.
- Correct sizing and install quality matter as much as the SEER number.
SEER ratings — frequently asked questions
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