Tankless Water Heater Installation in Austin, TX
If you've ever had to think about how much hot water is left, tankless might be one of the most satisfying upgrades you make as a homeowner.
Once it's in, continuous hot water is the new normal. Our licensed Austin plumbers install tankless water heaters sized, vented and set up to deliver that, and to last.
Why Homeowners Love Tankless
- Endless hot water. It heats on demand, so you don't run out mid-shower.
- Efficiency. A tankless gas unit is more efficient than a tank gas or electric heater, and condensing gas models are the most efficient water heaters made. The Department of Energy puts tankless at 24 to 34 percent more efficient for a typical household.
- Long life. A well-maintained unit lasts 20 years or more.
- Space. It's compact and wall-mounted, freeing up the floor space a tank takes.
- Less waste. Away on vacation with no hot water demand? It doesn't run.
You may fall in love with your tankless water heater.
The Endless Hot Water Experience
Picture running a load of laundry, the dishwasher and two showers, back-to-back or all at once, without anyone waiting. Picture setting the temperature exactly where you want it.
You can even create a hot water loop without a dedicated return line: modern tankless units can use your cold-water line as the return, circulating water so it stays hot near the taps you use most. With a loop, no one waits for the heater to catch up.
That experience is the real reason people switch. The rest of the benefits are the bonus.
What Our Customers Say
How a Tankless Water Heater Works
There's no storage tank. When you turn on a hot tap, cold water runs through the unit and a gas burner or electric element heats it on the way, so you get a constant supply without waiting for a tank to fill.
Austin's relatively warm incoming groundwater helps because a gas tankless unit hits strong flow rates without working as hard as it would in a freezing climate. So, it keeps up with a busy household.
A note on electric tankless: we usually steer homeowners away from it. A single electric tankless unit can need more than 100 amps at 240 volts, and many homes only have 100 to 200 amps of total service. Gas is almost always the better path.
Tankless in Austin's Hard Water
Here's the honest part most manufacturer brochures and salespeople skip. A tankless heater can last 20 years or more, but because of Austin's hard water, that long life requires maintenance.
Scale builds inside the unit's narrow heat exchanger, and left alone, it chokes the flow, drops efficiency and can cut the unit's life to a fraction of its potential. This type of neglect can void the manufacturer's warranty.
Two items help keep a tankless heater healthy: descaling and a whole-home water softener.
Descaling flushes the scale out of the heat exchanger. A softener stops the minerals before they ever reach the unit, which protects the heat exchanger, keeps the warranty intact and stretches the time between descaling from months to years.
Pair a tankless heater with a softener and you get both the endless hot water and the long life, not just one of them.
What the Warranty Covers
We mainly install Navien. Their warranty currently runs 15 years on the heat exchanger and 5 years on the unit itself, and we back our installation with a 1-year parts and labor warranty on top of that. Skipping descaling is one of the things that can void manufacturer coverage, which is another reason a softener earns its keep.
Tankless or Tank?
It comes down to performance versus cost. A tankless unit costs more up front and needs adequate gas supply and venting. You'll always get an upfront quote before we start, and we offer financing. Typical installed ranges:
| Option | Typical installed cost |
| Tankless conversion, from an existing tank | $4,500 to $6,500, depending on site complexity |
| Gas tank water heater replacement, standard installation | $2,200 to $2,700 |
| Electric tank water heater replacement, standard installation | $2,000 to $2,500 |
| Tankless descaling flush | $325 |
If your home runs a lot of hot water at once or you're tired of running out, tankless usually wins. If budget is the priority or the gas supply won't support it, a high-efficiency tank is the smart call.
Are Tankless Water Heaters Worth It?
What's in this video:
We walk through the benefits and drawbacks of tankless water heaters and how to tell whether one makes sense for your home. Worth watching if you're facing a replacement and weighing whether to switch.
Why Homeowners Trust Efficient with Tankless
From North Austin to Round Rock, Georgetown and Lakeway, homeowners choose Efficient AC, Electric & Plumbing because we:
- Size the unit and the gas line correctly, and vent it to code, which is where most tankless problems start
- Install Navien as our primary tankless line, so we know the units we put in your home
- Install tankless in our own homes, so we speak from experience
- Can set you up with a softener and a descaling schedule to protect your investment
- Offer financing so the upfront cost is easier to manage
- Back our work with a 1-year parts and labor warranty
Tankless Water Heater FAQs
Converting from a tank to tankless runs $4,500 to $6,500, depending on how complex the site is. See the pricing table above for tank comparisons and descaling costs.
Usage is mostly the same, with two small things to know:
1. You set the temperature once at the unit, so hot water comes out at your chosen temp every time.
2. Because a tankless fires up only when enough water is flowing, a bare trickle can run cold, so open the tap fully and you'll have steady hot water.
Yes, when it's sized for your home's peak demand. A tankless heats water to a set flow rate, so the key is matching the unit to how much hot water your household uses at the same time. We size yours to handle the showers, laundry and dishwasher running together, so no one gets left in the cold.
Explore Other Plumbing Services
- Water Heater Installation & Repair covers conventional tank units if tankless isn't the right fit for your home.
- Water Filter & Water Softener Installation & Repair is what stretches the years between descaling flushes.
- Gas Line & Leak Troubleshooting & Repair handles the line upsizing a tankless conversion often depends on.
- Faucet Installation & Repair sorts out the fixture when the slow hot water is the tap, not the heater.
- Drain Cleaning clears the clogs and recurring backups on the drain side of the sink.
- Emergency Plumbing answers 24/7 when a heater or supply line fails without warning.
- Plumbing Services covers the rest of what we handle for homes and businesses.
Serving Greater Austin & Central Texas
We serve homeowners and businesses across Travis, Williamson, Hays, Bastrop, Bell, Llano and Comal counties in the Greater Austin area, including Allandale, Barton Creek, Bastrop, Bee Cave, Brushy Creek, Buda, Canyon Lake, Cat Hollow, Cedar Creek, Cedar Park, Clarksville, Del Valle, Downtown Austin, Driftwood, Dripping Springs, Elgin, Georgetown, Granger, Great Hills, Horseshoe Bay, Hudson Bend, Hutto, Hyde Park, Jarrell, Jollyville, Jonestown, Killeen, Kingsland, Kyle, Lago Vista, Lakeway, Leander, Liberty Hill, Lost Creek, Manor, Mueller, New Braunfels, North Austin, Oak Hill, Pemberton, Pflugerville, Rollingwood, Round Rock, San Marcos, South Congress, Spanish Oaks, Spicewood, Steiner Ranch, Sun City, Tarrytown, Taylor, Temple, Travis Country, Travis Heights, Wells Branch and West Lake Hills.