Heat Pumps in Austin and Central Texas: The Complete Homeowner's Guide

Heat Pumps in the Texas Hill Country: The Complete Homeowner's Guide

By Greg White, HVAC Service Manager, Lantz Home Services. Updated July 2026.

If you're replacing an AC, tired of propane bills, or just heard the term "heat pump" and wondered whether it survives a Texas summer, this guide covers it. We've heated and cooled Highland Lakes homes since 1972, and heat pumps have become the best comfort-per-dollar technology we install. Here's everything we tell our own neighbors, with no sales pitch attached.

In this guide:

What is a heat pump and how does it work?
The types of heat pumps (and which fit Hill Country homes)
Why our climate is nearly perfect for heat pumps
What the efficiency numbers actually mean
Operating costs: heat pump vs propane, gas, and electric heat
The freeze question, answered honestly
Why sizing makes or breaks a heat pump
Maintenance: what you can do and what we should
Warning signs your heat pump needs repair
Repair or replace? The honest framework
Rebates and incentives: the current truth
FAQ

1. What is a heat pump and how does it work?

Bottom line: a heat pump is an air conditioner that can run in both directions.

Your AC doesn't create cold. It moves heat, pulling it out of your indoor air and dumping it outside. A heat pump does exactly that in summer. In winter, a component called a reversing valve flips the refrigerant flow, and the system moves heat from the outdoor air into your home instead.

"Heat from cold air" sounds like a trick, but even 30-degree air contains usable heat energy, and refrigerant is engineered to absorb it. Because the system moves heat rather than generating it by burning fuel or running electricity through coils, it delivers two to three units of heat for every one unit of electricity it consumes. That ratio is the entire reason heat pumps win on operating cost.

One system. Heating and cooling. No gas line, no propane tank, no flame.

2. The types of heat pumps

Ducted air-source heat pumps. The workhorse. An outdoor unit plus an indoor air handler connected to your home's ductwork. If you have central AC today, a ducted heat pump is usually a straightforward replacement. This is the most common system we install across the lakes.

Ductless mini-splits. An outdoor unit connected to one or more wall-mounted indoor "heads," no ducts required. Ideal for homes without ductwork, garage apartments, casitas, shops, additions, and the one room that never cools down. A one-head system is single-zone (most efficient). Several heads on one outdoor unit is multi-zone, which is practical for duct-free homes, though past three heads per outdoor unit the efficiency tradeoffs grow.

Dual-fuel systems. A heat pump paired with a gas or propane furnace. The heat pump handles roughly 95% of the winter cheaply, and the furnace takes over only in the deepest cold. A strong fit for homeowners who want maximum freeze insurance or already have a newer furnace.

Ground-source (geothermal) heat pumps. These pull heat from buried tubing instead of outdoor air. Extremely efficient, but installation involves serious excavation, and in much of the Hill Country that means drilling into limestone. For most homes here, a modern air-source system delivers most of the benefit at a fraction of the install cost. We'll be straight with you if your property is one of the exceptions.

3. Why our climate is nearly perfect for heat pumps

Heat pumps get debated in Minnesota. In the Texas Hill Country, the case is unusually clean:

Cooling dominates, and cooling is a heat pump's native job. Your system will run in AC mode from roughly April through October. Modern heat pumps cool as well as or better than the best conventional air conditioners, so you give up nothing during the season that matters most here.

Our winters are mild. Heat pumps are at their most efficient exactly in the 35-to-60-degree conditions that make up almost all of a Hill Country winter. The handful of genuinely cold nights are what backup heat and proper sizing are for (see section 6).

Humidity control is built in. Variable-speed heat pumps run long, low, and steady, which wrings moisture out of your air far better than an oversized AC that blasts and stops. That's the difference between 74 degrees that feels crisp and 74 that feels sticky in August.

Propane country. A large share of the rural and lakefront homes we serve heat with propane. That's the single strongest financial case for a heat pump anywhere in this guide, and it's covered in section 5.

4. What the efficiency numbers actually mean

Equipment brochures throw acronyms at you. Here's the plain-English version:

SEER2 measures cooling efficiency across a season. Higher is better. Think of it like miles per gallon for AC mode. In a cooling-dominated climate like ours, SEER2 is the number that most affects your annual bills.
HSPF2 is the same idea for heating mode. It matters here, but less than SEER2, because our heating season is short.
COP (coefficient of performance) is the "units of heat out per unit of electricity in" figure. A COP of 3 means triple the heat per dollar compared to electric resistance heat. Useful when comparing heating costs directly.
Variable-speed vs single-stage. Single-stage systems are on or off. Variable-speed systems throttle up and down like cruise control, which improves efficiency, comfort, and humidity control. In our climate, variable-speed is usually worth the upgrade, and we'll show you the operating-cost difference in any quote.

Don't buy the biggest number reflexively. The jump from mid-tier to top-tier efficiency sometimes costs more than it will ever return in a home with older ductwork. This is exactly the kind of tradeoff a proper in-home estimate settles.

5. Operating costs: heat pump vs propane, gas, and electric heat

The honest comparison, based on what we see across our service area:

Heat pump vs propane. The heat pump wins, usually by a wide margin. Propane is one of the most expensive ways to heat a home, its price swings with winter demand, and you're managing tank levels on top of it. If you heat with propane today, a heat pump is very likely the single best efficiency upgrade available to you. This describes a huge share of Highland Lakes homes.

Heat pump vs electric resistance (heat strips, baseboards, space heaters). Not close. A heat pump delivers the same warmth for roughly one-third the electricity. If your January electric bill makes you wince, this is the fix.

Heat pump vs natural gas. The closest race. Gas is cheap per unit of heat, and for some gas-connected homes a dual-fuel setup or even keeping a newer furnace is the right call. What tips it toward the heat pump: you're replacing the AC anyway, your furnace is old, or you value dropping the second system. We quote this comparison with real numbers rather than a blanket answer.

Cooling costs. Often overlooked: replacing a 12-year-old AC with a modern high-efficiency heat pump usually cuts summer cooling costs on its own. In our climate, that summer savings does a lot of the financial lifting before winter is even considered.

6. The freeze question, answered honestly

Every heat pump conversation in Texas eventually arrives at February 2021. Good. It should.

What's true: heat pumps lose some capacity as outdoor temperatures fall, and older or bargain-grade units leaned hard on expensive backup heat strips in real cold. Some homeowners with poorly spec'd systems had a rough week in 2021, and that experience drives most of the skepticism we hear.

What's changed: modern cold-climate rated heat pumps maintain strong output well below freezing and keep producing heat at temperatures colder than anything the Hill Country records. The technology that made heat pumps viable in New England winters is now standard equipment on quality installs here.

What actually protects you is the spec, not the brochure:

Sizing for freeze conditions, not the average January day.
Backup heat strips or a dual-fuel furnace as insurance for the coldest 2% of hours.
Commissioning, so the defrost cycle and staging actually work as designed.

Our rule at Lantz Home Services: every heat pump we install must be able to carry the home through a multi-day hard freeze. If a company quotes you a heat pump without raising freeze performance themselves, that tells you something. Get a second opinion.

One more freeze note: a heat pump doesn't need water, so unlike your pipes, it isn't the thing you should be worried about when the forecast turns. It may be the most freeze-resilient part of your home's mechanical systems.

7. Why sizing makes or breaks a heat pump

More heat pump complaints trace back to sizing than to any brand or model choice.

Oversized systems short-cycle. They blast, satisfy the thermostat, and shut off before completing a real cycle. That wears out compressors early and, critically for Texas, never runs long enough to dehumidify. The result is a house that's cool, clammy, and expensive.

Undersized systems run forever and lean on backup heat. Your "efficient" system quietly becomes an electric resistance heater every cold night, and the savings evaporate.

The fix is a Manual J load calculation: a room-by-room measurement of what your specific home needs, accounting for insulation, windows, orientation, ceiling heights, and duct condition. It takes real time during an estimate, which is why rushed quotes skip it and copy the tonnage off your old unit's nameplate, faithfully reproducing whatever mistake was made 15 years ago.

If you take one thing from this guide: don't accept a heat pump quote from anyone who didn't perform a load calculation.

8. Maintenance: what you can do and what we should

Heat pumps in Texas never get an off-season. Your system works twelve months a year, which makes maintenance matter more here than in climates where equipment rests half the year.

Homeowner tasks (easy, do these):

Change filters every 1 to 3 months. The single highest-value habit. A clogged filter strangles airflow and is behind a shocking share of the repair calls we run.
Keep the outdoor unit clear. Two feet of clearance, and rinse cedar pollen, cottonwood fluff, and grass clippings off the coil with a garden hose (gently, water only, system off).
Don't yo-yo the thermostat. Heat pumps are most efficient held steady. Big setbacks force the system into backup heat to catch up, which erases the savings.
Glance at the outdoor unit in winter. Light frost that clears itself is normal. Heavy ice is not (see section 9).

Professional maintenance (annually, ideally spring): Refrigerant charge verification, electrical component testing (capacitors weaken before they fail, always in July), coil cleaning, condensate line clearing, defrost cycle testing, and airflow measurement. This is the stuff that catches a $30 part before it becomes a $3,000 compressor. Many homeowners consider our Ultimate Home Care Plan, it provides the recommended annual inspections and adds priority scheduling during the seasons when everyone needs help at once.

9. Warning signs your heat pump needs repair

Call sooner rather than later if you notice:

Weak or warm air in cooling mode. In our summers, this is the do-not-wait symptom.
Ice on the outdoor unit beyond light winter frost, or any ice in summer. Shut the system off first; running an iced unit can kill the compressor.
Cold air in heat mode that never warms the house. (A few minutes of cool air during defrost is normal; hours of it are not.)
The aux/emergency heat indicator living on your thermostat. You're paying triple for heat and something upstream is wrong.
Short-cycling. On-off-on every few minutes wears the system fast.
Grinding, screeching, or repeated breaker trips. Shut it down and call.
A bill spike with no usage change. The system is working harder than it should, and it's telling you early.

Full symptom-by-symptom breakdowns, what's normal vs what isn't, and how our diagnostic process works are on our [heat pump repair page](LINK: /hvac/heat-pump-repair/).

10. Repair or replace? The honest framework

The framework our own techs use in the field:

Under 6 years old: repair, almost always.
6 to 12 years: judgment territory. Weigh the repair cost against remaining life. A simple electrical repair, yes. A compressor, run the numbers.
12 to 15+ years: in our year-round climate, that's a full service life. Major repairs at this age usually mean spending good money on borrowed time.
Quick gut check: multiply repair cost by system age. When the product lands in new-system territory, it's time to compare seriously.
Also weigh: repeated repairs (three visits in two summers is a message), phased-out refrigerant that gets pricier every year, and whether the system ever kept you comfortable in the first place.

Because Lantz Home Services handles both repair and installation, nobody in our shop earns more by steering you either direction. You get the framework and the math, and you make the call.

11. Rebates and incentives: the current truth

Here's an area where we'd rather be accurate than exciting.

Federal: the federal 25C tax credit that covered heat pumps ended for installations after December 31, 2025. If you see a company still advertising "up to $2,000 in federal tax credits" for a new install, their marketing is out of date, and it's fair to wonder what else is.

Utility and co-op programs: electric utilities and cooperatives in our region have historically offered rebates for high-efficiency heat pump installations, and programs change year to year. When we quote your system, we check what's currently available for your specific address and handle the paperwork we can. That's a better promise than quoting a program that may have expired by the time you read this.

The good news: the core financial case in section 5 (operating cost savings, especially over propane and electric resistance) never depended on incentives. Rebates are gravy, not the meal.

Heat pump FAQ

Do heat pumps work in Texas?

Texas is close to ideal heat pump territory. Cooling is their native strength, our mild winters sit in their peak-efficiency range, and the freeze risk is handled with proper sizing and backup heat.

Is a heat pump the same as an AC?

In cooling mode, functionally yes. The difference is the reversing valve that lets it also heat your home, replacing your furnace.

How long do heat pumps last?

Typically 11 to 15 years here, where they run year-round. Annual maintenance is the biggest factor you control.

Why does my heat pump run all the time in summer?

On 100-degree days, long steady runtimes are normal and even desirable for variable-speed systems. Constant running that never reaches the setpoint, or rapid on-off cycling, is a problem worth a service call.

Are heat pumps loud?

Modern units are quieter than the older ACs they typically replace. Variable-speed models spend most of their time at low, quiet speeds.

What does a new heat pump cost?

It depends on system type, size, efficiency tier, ductwork condition, and electrical work, which is why credible pricing requires seeing your home. Our installation page breaks down what moves the number, and estimates are free.

Should I get a heat pump when my AC dies?

That's the single best moment to consider one, because you're already buying the expensive half of the system. Get it quoted both ways and compare real numbers.

For Austin homes, a modern, properly sized heat pump is usually the most cost-effective way to stay comfortable year-round, and the case is strongest of all if you currently heat with propane or electric resistance. The technology question is settled. The outcome comes down to who sizes, installs, and stands behind the system.

We've been that company for Central Texas families since 1972.

Thinking about a new system? Heat pump installation, sized for Texas heat and hard freezes. System acting up? Heat pump repair, honest diagnostics, all major brands. Or just call us: (512) 710-1132

The Complete Homeowner's Guide to Heat Pumps