Tankless Water Heater Installation & Repair in San Antonio, TX

If you’re tired of running out of hot water or paying to keep a full tank heated around the clock, a tankless water heater might be exactly what your home needs. Hunter Service Group installs and repairs tankless water heaters for San Antonio homeowners looking for a more efficient and reliable hot water solution.

We’re a family-owned and operated company serving this community since 2015, and we’ll give you honest guidance on whether a tankless system is the right fit for your home before we ever recommend one.

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What your neighbors are saying about us

Patrick was very professional! I cannot recommend him highly enough, and whatever company he is working for. I very much liked their maintenance plan. He explained it very well and we purchased it. I highly recommend this plan, this company and this technician.

We absolutely love Hunters for all our electrical needs. We had originally called them out bc someone redoing our floors had burned up an outlet. Christopher was very knowledgeable and polite. He explained all recommendations that he had in a way that I understood. They are the only company I will use for all our electrical needs and upgrades.

I am very pleased with the service I've received from Hunter Service Group. Stacy was kind, respectful of my home, and professional. The install was performed in a timely fashion and I couldn't be more pleased. I will use Hunter Services for any future needs that I have within your scope! Thank you!

I highly recommend Hunter Service Group. We have recently worked with Noe Garcia and Tony Ruiz to help my in-laws find the right home generator for them to add some peace of mind if the power goes out. Installation should take place in the next few weeks. It has been a great experience so far.

Is a Tankless Water Heater Right for Your Home

Tankless water heaters are a strong option for many San Antonio homeowners, but they’re not the right fit for every situation. The best way to know for sure is to have a plumber assess your home’s hot water demand, gas or electrical capacity, and existing setup.

A tankless system tends to work well for households that run hot water in multiple areas at the same time, want to reduce energy waste from a constantly heated tank, or are replacing an aging unit and want a longer-lasting alternative. They’re also a practical choice for homes with limited utility space since the units mount on a wall and take up significantly less room than a traditional tank.

That said, homes with very high simultaneous hot water demand may need more than one unit to keep up, and older homes sometimes require gas line or electrical upgrades before installation can move forward. Our plumbers will assess your home honestly and tell you what’s involved before any work begins.

Benefits of Switching to a Tankless Water Heater

Upgrading from a traditional tank to a tankless system comes with several meaningful advantages, especially given how much San Antonio homeowners use hot water year-round. Benefits of making the switch include:

On-demand hot water that never runs out, regardless of how many people are using it.
Lower energy bills since the system only heats water when it’s needed rather than maintaining a full tank all day.
A longer lifespan compared to traditional tank units, often 20 years or more, with proper maintenance.
Reduced risk of water damage since there’s no large tank that can corrode and leak over time.
More usable space in your utility area with a compact, wall-mounted unit.
Better performance in San Antonio’s hard water conditions when paired with a water softener to reduce mineral buildup.

Signs Your Tankless Water Heater Needs Professional Repair

Tankless water heaters are reliable, but they’re not maintenance-free. San Antonio’s hard water is one of the biggest factors affecting tankless system performance, as mineral scale builds up on the heat exchanger over time and reduces efficiency. Watch for these signs that your unit needs attention:

You’re getting cold or inconsistent water temperatures during use.
The unit is displaying an error code on its control panel.
Hot water flow has slowed noticeably at your fixtures.
The system is making unusual noises during operation.
Your energy bills have crept up without a change in usage.
The unit is shutting off on its own before you’ve finished using hot water.

Our Tankless Water Heater Installation and Repair Services

Hunter Service Group handles the full scope of tankless water heater work for San Antonio homeowners. Whether you’re ready to make the switch from a traditional unit or your existing tankless system needs repair, our licensed plumbers have the training and experience to get it done right.

Our services include:

Tankless water heater installation for both gas and electric models.
Assessment of your home’s gas line and electrical capacity ahead of installation.
Heat exchanger cleaning and descaling to address mineral buildup from hard water.
Error code diagnosis and component repair or replacement.
Venting inspection and repair for gas-powered units.
Full system diagnostics for units that are underperforming or shutting down unexpectedly.

Why Choose Hunter Service Group

Hunter Service Group has been trusted by San Antonio homeowners since 2015 for plumbing work of all kinds, and tankless water heater installation and repair is no exception. We take the time to understand your home’s specific needs, recommend the right equipment without any pressure, and install it with care and attention to detail.

We offer flat-rate, upfront pricing on every job so you know what to expect before we begin. Our plumbers wear floor protectors, keep your space clean throughout the visit, and won’t leave until the system is running properly and your questions are answered. Because we also handle HVAC, electrical, and generator work, we’re the complete home service team San Antonio homeowners rely on.

Frequently Asked Questions

How long does tankless water heater installation take?

Most installations are completed in three to four hours. If gas line work, venting changes, or electrical upgrades are needed, the timeline may be longer, and we’ll let you know upfront before we begin.

How does San Antonio's hard water affect a tankless water heater?

Hard water causes mineral scale to build up on the heat exchanger, which reduces efficiency and can eventually cause the unit to overheat or fail. Annual descaling and pairing the system with a water softener are the best ways to protect your investment and extend the life of the unit.

How much can I save on energy bills with a tankless water heater?

Savings vary depending on your household’s usage, but tankless systems are generally 20 to 30 percent more energy-efficient than traditional tank units because they only heat water on demand. Homeowners who switch often notice a meaningful reduction in their monthly utility costs.

Can a tankless water heater supply hot water to my whole house?

For most San Antonio households, yes. The key is choosing a unit with the right flow rate for your home’s demand. In larger homes with very high simultaneous usage, two units may be recommended. Our plumbers will assess your needs and recommend accordingly.

How often does a tankless water heater need maintenance?

Annual maintenance is recommended, which typically includes descaling the heat exchanger to remove mineral buildup. In San Antonio, where hard water accelerates that buildup, staying on top of annual service is especially important for keeping the system running efficiently.