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Home » Plumbing Services » Tankless Water Heater
Tankless water heaters are one of the most popular upgrades we install for homeowners across Erlanger, Florence, and Northern Kentucky and it’s easy to understand why. In a region where older homes throughout Boone, Campbell and Kenton counties have been running the same tank water heater for a decade or more, the combination of endless hot water, improved energy efficiency, and a significantly longer lifespan makes the switch a compelling one. What makes tankless especially relevant in NKY is the hard water factor: the limestone aquifer that feeds municipal water across this area delivers water at 120–150 mg/L of mineral hardness, which means annual maintenance, particularly descaling the heat exchanger, is genuinely important here in a way it isn’t in softer-water markets.
Arlinghaus provides professional tankless water heater installation, repair, and maintenance for homeowners throughout Erlanger, Florence, Covington, Independence, and all of Northern Kentucky. Whether you’re replacing an aging tank unit, upgrading for a growing household, or dealing with a tankless system that needs attention, our licensed plumbers are ready to help.
A tankless water heater that stops producing hot water or starts throwing error codes is an urgent problem, especially in a household that has come to rely on on-demand hot water. Arlinghaus provides 24/7 emergency tankless water heater repair throughout Erlanger, Florence, and all of Northern Kentucky. Same-day response is available for urgent situations. Call us immediately if your unit has shut down completely, is producing error codes that won’t clear, or has stopped heating water entirely.
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Unlike a traditional tank water heater that stores and constantly reheats a fixed volume of water, a tankless system heats water on demand: no tank to run out of, no standby heat loss, and no waiting for recovery after high-demand periods. One thing worth clarifying: tankless doesn’t mean instant at the tap. Water still travels through your supply lines from the unit to the fixture. What changes is that the supply is endless rather than limited. For true near-instant delivery, a recirculating pump can be added and that’s something our team can assess during an installation consultation.
Here’s what NKY homeowners most often report after making the switch:
At Arlinghaus, it all starts with passion. We’re a family-owned business specializing in electrical, plumbing, heating, and air conditioning services. With years of experience and a team of certified residential contractors, we provide reliable services that homeowners can depend on.
We’re proud to serve the communities of Northern Kentucky, Southeast Indiana, and Greater Cincinnati, Ohio areas, with an office based in Northern Kentucky and the Sharonville, Cincinnati area. We love our region, which blends the warmth of happy small-town charm with the variety and excitement of big-city life.
Our award-winning, expertly trained team has over 6,000 five-star reviews. We’ve been voted the Best in Cincinnati for Plumbing, Heating, and Air Conditioning, Best of the North by Cincy Magazine, and Best of NKY for 10 consecutive years, which means our commitment to quality and customer satisfaction is recognized year after year.
It all starts with passion. Arlinghaus is proud to be a trusted, family-owned plumbing and HVAC company in the Kentucky, Cincinnati, and Indiana areas.
It all starts with passion. Arlinghaus is proud to be a trusted, family-owned plumbing and HVAC company in the Kentucky, Cincinnati, and Indiana areas.
A tankless installation is more involved than a standard tank swap, and proper sizing and setup are critical to performance. Here’s what every Arlinghaus tankless installation includes:
Most installations are completed in a single day. Financing is available for qualifying homeowners.
We’re a family-owned business with deep roots in the Erlanger, Kentucky, and Greater Cincinnati communities. Our commitment to quality service and customer satisfaction has made us a trusted name in the area for years. Here’s a little more about what makes our electrical company stand out:
Family-Owned and Operated:
We’re proud to be a local business that puts the community first.
Experienced Team:
Our team is fully certified, highly trained, and passionate about what they do.
Comprehensive Services:
From minor repairs to full installations, we handle all residential needs.
Customer-First Approach:
We focus on clear communication and friendly service every step of the way.
Satisfaction Guarantee:
We're not happy until you’re happy — every job comes with a satisfaction guarantee.
Thank you to our community for voting Arlinghaus as The Best in Cincinnati, Best of NKY 10 years running , Best of the North and more:
Happy House CLub
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Not every NKY home is the right fit for a tankless water heater, and we’ll always give you an honest assessment. Here’s how the two options compare:
| Tankless | Traditional Tank | |
| Upfront cost | Higher | Lower |
| Lifespan | 15–20 years | 8–12 years (NKY hard water) |
| Energy efficiency | More efficient due to no standby heat loss | Lower as it’s constantly reheating stored water |
| Hot water supply | Endless on demand | Limited to tank capacity |
| Space requirement | Compact, wall-mounted | Larger floor footprint |
| Maintenance in NKY | Annual descaling critical | Annual flush recommended |
Tankless makes the most sense for homeowners who regularly run out of hot water, want to reduce long-term energy costs, or are replacing an aging tank unit in a home they plan to stay in. For homeowners replacing a recently failed unit on a tight timeline, a traditional tank may still be the more practical near-term solution.
Gas tankless water heaters deliver higher flow rates and handle simultaneous high-demand use better – making them the most common installation we do in NKY homes that already have gas service.
Electric tankless water heaters are a simpler installation for homes without gas service and work well for smaller households or point-of-use applications. They require adequate electrical panel capacity, which our team assesses as part of every installation.
Most tankless systems give warning before they fail completely. Here are the signs that repair may not be enough:
If several of these are happening at once, replacement is often more cost-effective than continued repairs.
When a tankless system has an issue, it affects every hot water outlet in the home and unlike a tank unit, there’s no stored reserve to fall back on while you wait. Arlinghaus handles tankless water heater repair throughout Erlanger, Florence, and Northern Kentucky with same-day response available for urgent situations.
Common repair situations we handle include:
Annual maintenance is important for any tankless water heater. In Northern Kentucky it’s especially critical. The 120–150 mg/L mineral hardness of NKY’s limestone-fed water supply accelerates scale buildup inside tankless heat exchangers faster than in most other markets. This reduces heating efficiency, increases energy consumption, and shortens the unit’s useful life if left unaddressed.
A professional tankless tune-up from Arlinghaus includes:
A water softener installed upstream significantly reduces the mineral load that causes scale buildup, extending the life of the unit and reducing the frequency of descaling needed. Arlinghaus installs whole-home water softener systems and can assess whether one makes sense alongside a new tankless installation. Annual maintenance is included for Happy House Club members.
Whether you’re ready to make the switch or your current system needs attention, Arlinghaus is ready to help. Call now or schedule online. We offer tankless water installation, repair, and maintenance throughout Erlanger, Florence, and all of Northern Kentucky.
We believe that one of life’s greatest gifts is the ability to celebrate one’s place in a thriving community, with family and friends, where everyone shares a common set of goals and dreams. We are fortunate to work and live in great communities throughout Kentucky, Cincinnati and Indiana, areas that have welcomed and embraced us over the years. We are happy to give back to those communities through a variety of initiatives, some very public, others totally private. We’re a people-first company.
