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SEER2 Minimums Explained: What Texas Homeowners Need to Know

SEER2 is how today's air conditioners are rated for efficiency, and federal rules set the minimum you can buy in Texas. Here's what the number means, the Texas floor, and how to pick the right efficiency level without overpaying.

By Mike Dodge, Owner Updated June 17, 2026 6 min read

Reviewed by Mike Dodge, Owner of MLD Services (licensed TACLA37761C).

When you shop for a new AC, you'll see a "SEER2" number on every unit — and a price that climbs with it. Understanding what that number means (and the legal minimum for Texas) helps you buy the right efficiency for your home instead of the most expensive one on the floor.

What SEER2 measures

SEER2 (Seasonal Energy Efficiency Ratio 2) measures how much cooling a system delivers per unit of energy across a season — higher is more efficient. It replaced the older SEER rating in 2023, using a tougher, more realistic test (higher external static pressure that better reflects real ductwork). Because the test is stricter, a unit's SEER2 number is a little lower than its old SEER number — same equipment, more honest rating.

The Texas minimum

Efficiency minimums are set by region, and Texas sits in the DOE "South" region. Under the 2023 standards:

Split-system central ACs (South): minimum 14.3 SEER2 (≈15 on the old SEER scale).
Heat pumps (national): minimum 14.3 SEER2 / 7.5 HSPF2.

These DOE minimums are periodically revised, so we confirm the current figure for your install before relying on it. The practical effect: a contractor can't sell you a brand-new system below the regional minimum, so that's the efficiency floor for any new install.

SEER2 efficiency scale

14.3 SEER2 — the South-region legal minimum that applies in Texas.
Higher SEER2 — more efficient to run, more to buy up front.

SEER2 is a measured rating, not a marketing number. Texas sets a legal floor; the right number for your home balances up-front budget against how long you plan to stay and run it.

How efficiency affects price and bills

Higher SEER2 = lower running cost. In our long cooling season, efficiency gains show up on the bill every month.
Higher SEER2 = higher up-front cost. Premium-efficiency systems cost more to buy.
There's a sweet spot. Beyond a certain level, the extra up-front cost outpaces the monthly savings for many homes.

We help you find that sweet spot for your home and runtime — not just sell you the biggest number. Pair this with New AC Cost to see how efficiency moves the price.

SEER2 and the bigger picture

Efficiency rules work alongside the 2025 refrigerant change — together they shape what new equipment looks like in 2026. And like any new install, your system should be permitted and inspected. None of this should be used to pressure you; it's just the landscape your next system lives in.

How we help

MLD Services has matched Leander-corridor homes to the right efficiency level since 2009. We size properly, explain the real monthly difference between options, and quote a flat, written price — so you choose efficiency with eyes open, never under pressure. We're a Factory-Authorized York dealer with NATE- and EPA-certified technicians.

What to do next

See how efficiency affects price in What a New AC Costs.
Lowering bills on your current system first? Read Why Your Summer Bill Is So High.
Have a high-SEER upsell quote? Get a free second opinion.

Call 512-528-4258 to find your efficiency sweet spot.

Want a second opinion before you spend a dollar?

Send us another company's quote, or just ask a question. A licensed MLD Services pro will give you the honest, repair-first answer — with zero pressure.

Get a Free Second Opinion Call 512-528-4258

Quick Answers

Frequently asked

What is SEER2?

SEER2 is the current efficiency rating for air conditioners and heat pumps — it measures cooling output per unit of energy over a season. It replaced the old SEER rating in 2023 using a more realistic testing method (higher external static pressure), so SEER2 numbers run a bit lower than the old SEER for the same equipment.

What's the minimum SEER2 in Texas?

Texas is in the DOE 'South' region. As of the 2023 standards, split-system central ACs sold in the South must be at least 14.3 SEER2 (about 15 on the old SEER scale), and heat pumps must meet 14.3 SEER2 nationally. These minimums are periodically updated by the U.S. Department of Energy, so we confirm the current figure for any new install.

Is a higher SEER2 worth the extra cost?

Often, in our long Texas cooling season — a higher-efficiency system uses less energy every month it runs, so the savings add up. But there's a point of diminishing returns. We help you find the efficiency level where the monthly savings justify the up-front price for your home.

Does SEER2 affect what I can buy?

Yes. New equipment sold in Texas must meet the regional SEER2 minimum, so below-minimum units aren't available new. That sets a floor on efficiency (and price). Call 512-528-4258 and we'll match you to the right level.

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