If you’ve been hearing more about “SEER2” lately, you’re not alone. SEER2 is the updated efficiency rating system used for new air conditioners and heat pumps, and it affects what equipment can be installed, how systems are labeled, and how homeowners compare efficiency when shopping for a new HVAC system.

For homeowners across San Antonio and surrounding areas like Boerne, Helotes, Stone Oak, Alamo Heights, Schertz, Cibolo, Bulverde, and New Braunfels, SEER2 matters because our HVAC systems work hard for most of the year—especially during long, hot summers. Choosing the right efficiency level can impact your comfort and your monthly electricity costs.

Below is a clear breakdown of what SEER2 is, what the minimum requirements are in Texas, and what you should do if you’re planning to replace your AC or heat pump.

What Is SEER2 (and Why Did It Replace SEER)?

SEER stands for Seasonal Energy Efficiency Ratio. It’s essentially a measure of how efficiently an air conditioner or heat pump cools your home over a typical cooling season.

SEER2 uses the same basic concept, but the testing procedure changed to better reflect real-world conditions—especially how HVAC systems perform with the kind of ductwork resistance seen in actual homes. Because the new test is stricter, SEER2 numbers are usually a little lower than the old SEER numbers, even for similar real-world performance.

What this means for you:
A “lower” SEER2 rating doesn’t automatically mean the unit is less efficient—it often means it’s being measured with more realistic testing.

When Did SEER2 Take Effect?

SEER2 metrics became the standard for residential equipment starting January 1, 2023.

So today, if you’re shopping for a new system in San Antonio, you’ll typically see equipment labeled with:

• SEER2 for cooling efficiency

• EER2 for peak cooling efficiency (a different test condition)

• HSPF2 for heat pump heating efficiency

SEER2 Minimum Requirements in Texas

Texas falls under the Southwest region for regional AC efficiency standards. In this region, the minimum requirements depend on the system size.

Residential central air conditioners (split systems)

For systems below 45,000 BTU (roughly under 3.75 tons):

• Minimum 14.3 SEER2

• Minimum 11.7 EER2

For systems 45,000 BTU and above:

• Minimum 13.8 SEER2

• Minimum 11.2 EER2

Heat pumps (national minimums)

Heat pump minimums are generally national, not regional. For split-system heat pumps, the minimum is:

• 14.3 SEER2

• 7.5 HSPF2

Quick Translation: SEER vs SEER2 (So You Can Compare Older Systems)

Many homeowners still have older systems labeled in SEER, so it helps to know the rough comparison.

A common reference point:

• 15 SEER ≈ 14.3 SEER2

• 14 SEER ≈ 13.4 SEER2

So if you’re replacing an older system, SEER2 helps you compare apples-to-apples with today’s standards.

What SEER2 Means for Your Budget and Your Options

1) New equipment options are standardized around SEER2

If you’re considering replacing your AC or heat pump, SEER2 affects what can legally be installed and how equipment is rated. In Texas, most standard residential systems you’ll see today meet or exceed the minimums, but the key is making sure the exact system combination meets requirements.

2) Efficiency upgrades can reduce monthly operating costs

In San Antonio’s climate, your AC can run for long stretches during late spring through early fall. Higher efficiency equipment can help lower electrical usage over time—especially if your current system is older and struggling.

3) The “system match” matters (not just the outdoor unit)

A big point homeowners miss: SEER2 ratings are often based on a matched system (outdoor unit + indoor coil/air handler + sometimes thermostat setup). A mismatch can reduce performance or prevent the system from meeting required ratings. This is why working with a professional installer matters.

How to Protect Yourself When Buying a New AC or Heat Pump

If you’re shopping for a new system in San Antonio or nearby communities, here are a few smart questions to ask:

• What is the SEER2 rating of the installed, matched system?

• Does it meet the Southwest minimum for my system size?

• Will my ductwork support the airflow the new system needs?

• What comfort issues are we solving (hot rooms, humidity, airflow, allergies)?

• What maintenance steps will keep it efficient long-term?

A good contractor should be able to explain your options clearly—without pressure—and help you choose a system that fits your home, your budget, and the way you actually use your HVAC.

Don’t Want a New System Yet? Maintenance Helps You Buy Time

Even if you’re not planning to replace your HVAC system right now, SEER2 is still a good reminder to take care of what you have.

Regular maintenance can:

• Keep efficiency from dropping

• Reduce the chance of expensive breakdowns

• Help your system handle San Antonio heat with less strain

Cowboys Air Conditioning & Heating offers a yearly maintenance plan that includes an annual AC tune-up, a furnace inspection, discounts on repairs, priority scheduling, and more.

Need Help Comparing SEER2 Options in San Antonio?

If you’re thinking about upgrading your air conditioner or heat pump—or you want a professional opinion on whether your current system is worth repairing—Cowboys Air Conditioning & Heating is ready to help across San Antonio and surrounding areas.

Call (210) 495-7771 to schedule service. Cowboys AC is open 24 hours, 7 days a week and dispatches from San Antonio.