Tankless Water Heater Installation and Repair in Charlottesville, VA
A tankless water heater heats water on demand as it flows, rather than storing it hot in a tank, which buys hot water that does not run out, standby losses that do not exist, and a wall-mounted footprint that returns floor space. Robertson Electric installs, repairs, and maintains tankless water heaters in Charlottesville, VA and the surrounding counties.
The important consideration is sizing. A tankless unit’s output is a temperature-rise budget: it can lift so many gallons per minute by so many degrees. Central Virginia groundwater arrives cold in winter, far colder than in the Gulf South, so the same unit that showers two bathrooms in September may fall behind in January if it was sized on optimistic numbers. We size against winter inlet temperatures and your household’s simultaneous demand, which is why our installations function reliably all year.
Schedule with Robertson Electric by phone, online, or 24/7 chat, and get a tankless quote sized for your needs.

Tankless Installation
Gas units dominate for whole-home service because heating flowing water takes serious power, and the installation includes the details that decide performance: a gas line sized for the unit’s full firing rate, coordinated through our gas line services, correct venting for a condensing or non-condensing model, condensate handling, and isolation valves that make future service possible. Electric tankless serves point-of-use roles well. The work is permitted where required, photographed, and backed by the 10-Year Worry-Free Warranty, and we will tell you plainly when your household’s pattern favors a quality tank instead, priced side by side through our water heater services.
Tankless Repair and Descaling
Tankless units report their problems as error codes and behavior: temperature swings, the cold-water sandwich, ignition failures, and flow-related shutdowns. Many trace to one maintenance reality, scale. Minerals precipitate inside the heat exchanger, and on the harder well water common across the surrounding counties, they do it faster, throttling output and efficiency until a descaling flush restores them. We diagnose by code and measurement, photograph findings, and price repairs first. Annual descaling, more often on hard water, keeps the exchanger honest, and water that tests hard enough gets the source treated through our water treatment and filtration services, which protects the whole house along with the heater.

Licensed Plumbers Offering Plumbing Solutions in Charlottesville, VA and Surrounding Northern Virginia Area
And Dozens More
Qualified for All Major Makes and Models
Our team of expert technicians is trained to handle all makes and models of major brands with precision and care. From routine maintenance to complex repairs, we ensure top-notch service for all.
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Ensure optimal efficiency of all your systems
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Lower your utility costs with energy efficiency
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Extend your system’s lifespan through regular maintenance
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Keep you and your family comfortable and safe during all seasons
Our Certifications & Awards
FAQs
Will a tankless heater really never run out of hot water?
It will not run out over time; it can be outrun in the moment. Output is a flow budget, and three simultaneous showers can exceed it. Correct sizing against winter temperatures and your real usage is what makes “endless” true in practice.
Why does winter matter for tankless sizing in Virginia?
Because the unit must lift incoming water to shower temperature, and winter groundwater here arrives decades of degrees colder than summer’s. A unit sized on summer numbers loses capacity exactly when showers matter most.
What is the cold-water sandwich?
Because the unit must lift incoming water to shower temperature, and winter groundwater here arrives decades of degrees colder than summer’s. A unit sized on summer numbers loses capacity exactly when showers matter most.
How often does a tankless unit need descaling?
Annually as a baseline, and more often on hard well water. Scale is the technology’s one real tax, and the flush is quick, scheduled work, while a scaled-shut exchanger is an expensive repair.
Does tankless save money over a tank heater?
It eliminates standby losses and lives longer, roughly twenty years against a tank’s ten to twelve, at a higher upfront and installation cost. The honest math depends on your fuel, usage, and gas line situation, and we run it with you rather than asserting a winner.

Need a Maintenance Plan?
- Prevent costly repairs with regular maintenance checks
- Ensure your systems are running efficiently year-round
- Extend the lifespan of your heating and cooling units
- Minimize the risk of unexpected breakdowns and emergencies
- Improve energy efficiency and lower utility bills
- Ensure the safety and reliability of your home's systems

HVAC & IAQ Financing Available
Financing plans bring value and benefits to homeowners. By opting for a financing option, you can tackle necessary repairs or upgrades without draining your savings or delaying important projects. Here are some key advantages:
- Budget-Friendly
- Access to Quality Services
- Timely Repairs
- Flexibility
- Increase Home Value
- Emergency Protection
Keep your home safe and comfortable with a finance plan. Always assess terms and interest rates to find the best one for your needs. A professional can help you make an informed decision.
Learn MoreJane Matthews
Robertson Electric was quick to reply to my call for help when my water heater was malfunctioning. They actually acquired a new one for me and showed up that very afternoon when they were extremely busy. The repairman was so competent and quickly addressed the problem, saving me a couple of thousand dollars even after they had the new water heater on the truck. In other words, they came to my rescue and I will continue to use them whenever I can.
John Peterson
The pressure switch on my water tank failed one afternoon, spraying water everywhere! I got everything shut off and called Robertson Electric. The two gentlemen showed up on time, were professional, knowledgeable, polite and took the time to answer my questions. They got the switch repaired quickly and efficiently and I trust their work. As a repeat customer (they previously installed our central air system a few years ago - quite a task!) Robertson Electric is my "Go-To" for household repairs. I highly recommend them for any problems you may encounter.
Barry Parks
Robertson Electric is the very best. I highly recommend you buy their service agreement, too - that way you get priority service if you ever get in a jam. They do top-notch work and all of their people are very courteous and a pleasure to deal with.
Serving You Like Family Since 1968
Robertson Electric has been Charlottesville, Virginia's trusted provider since 1968. Our team upholds a commitment to excellence, which is evident through accolades like the Daily Progress Reader's Choice Poll and The C'ville Weekly Best of C-Ville awards. We proudly provide prompt assistance and guaranteed customer satisfaction for all heating, cooling, plumbing, electrical, and indoor air quality needs. Through top-quality products and unmatched customer service, Robertson Electric stands out as the reliable, dependable partner for keeping all major home systems in optimal working condition.

















