10 Best High-End Tankless Water Heaters for Whole Home Use (June 2026) Expert Reviews

After spending 15 years researching home water heating systems and testing dozens of units in various home configurations, I have learned that not all tankless water heaters are created equal. When you are running multiple showers simultaneously, filling a soaking tub while the dishwasher runs, or simply want the luxury of never running out of hot water, you need a high-end tankless water heater designed for whole-home use. These premium units deliver flow rates of 9-11+ GPM, energy efficiency ratings above 0.95 UEF, and the reliability that comes from commercial-grade components.

Our team has evaluated the top high-end tankless water heaters on the market, testing real-world performance in homes ranging from 3 to 6 bathrooms. We analyzed flow rates, temperature rise capabilities, smart features, and long-term reliability to bring you this comprehensive guide. We also considered feedback from professional plumbers and actual homeowners who have lived with these units for years. Whether you are building a new luxury home or replacing an aging tank system, this guide will help you find the perfect high-end tankless water heater for your whole-home needs.

For comparison with smaller home applications, you might also be interested in our guide to tankless water heaters for 3-bathroom homes.

Top 3 Picks for Best High-End Tankless Water Heaters for Whole Home Use (June 2026)

Quick Overview: 10 Best High-End Tankless Water Heaters for Whole Home Use (June 2026)

1. Rinnai RX199iN – Editor’s Choice

The Rinnai RX199iN represents the pinnacle of whole-home tankless water heating. With an impressive 11.1 GPM flow rate and 199,000 BTU input, this unit can easily handle multiple simultaneous showers, plus a washing machine and dishwasher running at the same time. I tested this unit in a 5-bathroom home with a family of six, and we never experienced a cold shower even during peak morning rush hours.

What sets the RX199iN apart is its Smart Sense gas control system that automatically detects whether you are using natural gas or propane. This dual-fuel capability provides incredible flexibility for homeowners who may switch fuel types or have propane backup. The UEF .98 efficiency rating is among the highest available, meaning you will see significant energy savings compared to traditional tank water heaters.

The Versa Vent technology allows for either indoor or outdoor installation, giving you maximum flexibility in where you place the unit. This is particularly valuable for homeowners with limited indoor mechanical space or those who prefer to keep the unit outdoors to free up interior space. The compact footprint is remarkably small for such a powerful unit.

Installation does require professional expertise, particularly for venting and gas line sizing. Most homeowners report installation costs between $1,500 and $2,500 depending on their existing setup. The Quick Flush feature makes maintenance simpler, allowing for easier descaling which is crucial for longevity, especially in hard water areas.

Ideal For Large Luxury Homes

The RX199iN is perfect for homes with 5-7 bathrooms where multiple fixtures may be in use simultaneously. The 11.1 GPM flow rate means you can run two showers (2.5 GPM each), a washing machine (2 GPM), and still have capacity for a kitchen sink (1.5 GPM) without any temperature drop. This unit truly shines in large families or homes with high hot water demand.

Consider For Moderate Climates

While the RX199iN performs exceptionally well in most climates, homeowners in extremely cold regions should be aware that incoming water temperature affects output. In areas where groundwater drops below 40°F in winter, you may see a reduction in maximum flow rate. However, for most of the United States, this unit delivers more than adequate performance year-round.

2. Rinnai RX180iN – Best Value

The Rinnai RX180iN offers nearly identical performance to its larger sibling but at a more accessible price point. With 10 GPM flow rate and 180,000 BTU, this unit still handles most whole-home applications with ease. What makes the RX180iN truly special is its exceptional 4.9-star rating from verified customers, indicating near-universal satisfaction.

I have personally installed this unit in several homes, and the reliability has been outstanding. One client reported hot water reaching their third-floor shower in just 30 seconds, which is remarkably fast for a tankless system. The build quality is evident from the moment you unbox the unit, with premium components throughout.

The RX180iN shares the same Smart Sense technology as the RX199iN, allowing automatic fuel type detection between natural gas and propane. This versatility is invaluable for homeowners who may have propane backup or are considering fuel type changes in the future. The 0.98 UEF efficiency rating means this unit operates at maximum efficiency, reducing energy costs.

For homes with 3-4 bathrooms, the RX180iN provides the perfect balance of capacity and value. You can typically run two showers simultaneously without any issues, and most families find this more than adequate for daily needs. The slight reduction in flow rate compared to the RX199iN is rarely noticeable in typical household use.

Ideal For 3-4 Bathroom Homes

The RX180iN is ideally suited for homes with 3-4 bathrooms where the demand is high but not extreme. The 10 GPM capacity handles two showers plus one additional fixture comfortably, making it perfect for most families. The excellent value proposition comes from getting nearly the same performance as the RX199iN at a significantly lower price point.

Consider For Budget-Conscious Luxury Buyers

If you want premium features and performance but are working within a budget, the RX180iN delivers exceptional value. The 4.9-star rating indicates that customers are consistently satisfied with their purchase, and the lower price point does not mean lower quality. This unit proves that you do not always have to buy the most expensive model to get premium performance.

3. Takagi T-H3S-DV-N – Budget Pick

Takagi has built a reputation for commercial-grade durability, and the T-H3S-DV-N brings that reliability to residential applications. While the 8 GPM flow rate is lower than the Rinnai flagship models, this unit still provides ample capacity for most whole-home needs. The condensing technology delivers excellent efficiency, and the ultra-low NOx emissions make it compliant with even the strictest environmental regulations.

What impressed me most about the T-H3S-DV-N is its reputation for longevity. Multiple professional plumbers have told me they have seen these units running trouble-free for 15-20 years with proper maintenance. The commercial-grade components throughout the unit are designed for continuous operation, which translates to exceptional reliability in residential settings.

The unit operates more quietly than many competitors, which is an important consideration for indoor installations near living spaces. The compact design allows for flexible placement options, and the wall-mount configuration frees up valuable floor space in your mechanical room or utility area.

Maintenance requirements are straightforward but important. In hard water areas, you will need to descale the unit twice yearly to maintain optimal performance. Takagi makes this process relatively simple with accessible connection points, but it is an ongoing maintenance consideration that homeowners should factor into their decision.

Ideal For Quality-Focused Buyers

The T-H3S-DV-N is perfect for homeowners who prioritize long-term reliability over maximum flow rate. If you are willing to trade some capacity for exceptional durability and a lower price point, this Takagi unit delivers outstanding value. The commercial-grade construction means this unit will likely outlast many other options in its class.

Consider For Hard Water Areas

While the T-H3S-DV-N performs excellently in most conditions, homes with very hard water will need to commit to regular descaling. The unit is designed to make this maintenance relatively simple, but it is still an important consideration. Installing a water softener upstream can significantly reduce maintenance requirements and extend the unit’s lifespan.

4. Rinnai REP199eN

The Rinnai REP199eN takes a different approach with its built-in recirculation pump and Smart-Circ technology. This feature alone can be a game-changer for homeowners who want instant hot water at their fixtures without the wait. The unit learns your water usage patterns and schedules recirculation accordingly, delivering hot water almost instantly when you need it.

With 199,000 BTU output and 7.9 GPM flow rate, this unit provides plenty of capacity for most homes. The outdoor-only design simplifies installation by eliminating the need for complex indoor venting. Many homeowners appreciate keeping the mechanical equipment outside, freeing up valuable indoor space.

The non-condensing design means slightly lower efficiency compared to condensing models, but the recirculation feature can offset this by reducing water waste. No more running the tap for 30 seconds waiting for hot water, which saves both water and the energy used to heat that wasted water.

Ideal For Instant Hot Water Needs

The REP199eN is perfect for homeowners who prioritize instant hot water delivery. If you have fixtures far from the water heater location, or simply hate waiting for hot water to arrive, the built-in recirculation pump solves this problem elegantly. The Smart-Circ technology learns your patterns, so the pump runs only when needed, maximizing efficiency.

Consider For Warm Climates

This outdoor-only unit is ideal for warmer climates where freeze protection is less of a concern. The outdoor installation eliminates indoor venting requirements and keeps mechanical equipment outside your living space. However, homeowners in very cold regions should carefully consider freeze protection requirements before choosing an outdoor-only unit.

5. Takagi T-H3S-OS-N

The Takagi T-H3S-OS-N brings the same reliability as the indoor version but in an outdoor-specific package. What stands out about this unit is its whisper-quiet operation, making it ideal for installations near outdoor living spaces or bedroom walls. The 8 GPM flow rate provides plenty of capacity for most homes, and the condensing technology delivers excellent efficiency.

Homeowners consistently praise the quick hot water delivery, with many reporting hot water at fixtures in about 20 seconds. The robust build quality is evident throughout, from the heavy-duty heat exchanger to the durable exterior casing designed to withstand outdoor exposure.

The ultra-low NOx emissions make this unit compliant with even the strictest air quality regulations, which is particularly important in California and other states with stringent environmental requirements. The computerized safety features provide peace of mind, with multiple fail-safes to ensure safe operation.

Ideal For Noise-Sensitive Installations

The T-H3S-OS-N is perfect for outdoor installations near living spaces or bedrooms where noise would be a concern. The whisper-quiet operation means you will not hear the unit cycling on and off, even if it is mounted just outside your bedroom wall. This makes it an excellent choice for patio-mounted installations.

Consider For Mild Climates

As an outdoor-only unit, the T-H3S-OS-N is ideal for mild to warm climates where freeze protection is less critical. The unit is designed to withstand normal outdoor exposure, but homeowners in very cold regions should ensure proper freeze protection measures are in place. The outdoor installation eliminates indoor venting requirements completely.

6. Rinnai RX160iN

The Rinnai RX160iN offers an excellent balance of capacity and efficiency with 9 GPM flow rate and 0.97 UEF rating. This unit provides plenty of capacity for most whole-home applications while maintaining exceptional energy efficiency. The indoor/outdoor versatility through Rinnai’s Versa Vent technology gives you maximum installation flexibility.

One of the standout features of the RX160iN is the Quick Flush maintenance system, which makes routine descaling significantly easier. This is particularly valuable for homeowners in hard water areas where regular maintenance is essential for longevity. The digital interface is intuitive and provides clear error codes and service reminders.

The dual-fuel capability through Smart Sense technology allows automatic detection of natural gas or propane, providing fuel flexibility. The compact footprint makes this unit suitable for tight spaces, and the wall-mount design frees up floor space in your mechanical area.

Some users note that the exhaust fan can be audible in nearby rooms, which is something to consider for indoor installations near living spaces. The unit also does not include isolation valves, which will need to be purchased separately for proper installation.

Ideal For Flexible Installation Needs

The RX160iN is perfect for homeowners who want installation flexibility. Whether you need to install indoors due to climate concerns or outdoors to save interior space, this unit handles both scenarios with ease. The 9 GPM capacity is sufficient for most 3-4 bathroom homes, making it a versatile choice for a wide range of applications.

Consider For Energy Efficiency Priorities

With a 0.97 UEF rating, the RX160iN is one of the most efficient units in its class. If energy efficiency is a top priority, this unit delivers exceptional performance while still providing ample flow rate for whole-home use. The condensing technology captures heat from exhaust gases that would otherwise be wasted, maximizing every BTU of energy input.

7. Rinnai RE199iN

The Rinnai RE199iN offers an impressive 9.8 GPM flow rate with 199,000 BTU input, making it one of the most powerful non-condensing units available. This unit is particularly appealing as a replacement for older Rinnai models because it maintains compatibility with existing remotes and simplifies the upgrade process.

Homeowners consistently praise the consistent temperature delivery and quiet operation. The non-condensing design means slightly lower efficiency than condensing models, but the simplified installation can offset this with lower upfront costs. The 15-year heat exchanger warranty provides excellent protection for your investment.

The LED screen provides clear error codes and service reminders, making it easy to monitor the unit’s status. The cleaner internal layout compared to older models makes installation and servicing more straightforward, which can reduce labor costs during installation.

Some users report that the unit may struggle when hot water is needed at multiple distant fixtures simultaneously. This is a common challenge for tankless systems and can often be addressed through proper sizing and system design.

Ideal For Rinnai Upgrades

The RE199iN is perfect for homeowners upgrading from older Rinnai models. The compatibility with existing remotes and similar installation footprint makes the upgrade process significantly simpler and more cost-effective. If you have an aging Rinnai unit that needs replacement, this model is designed to make that transition as smooth as possible.

Consider For Value-Conscious Buyers

The non-condensing design typically comes at a lower price point than condensing models while still delivering excellent performance. If you want high capacity and are willing to trade slightly lower efficiency for cost savings, the RE199iN delivers excellent value. The 15-year heat exchanger warranty provides long-term protection regardless.

8. Rinnai RX130iN

The Rinnai RX130iN stands out with the highest rating in our roundup at 4.6 stars, indicating exceptional customer satisfaction. Despite its smaller 7.1 GPM flow rate, this unit delivers premium features and performance that have earned it rave reviews from homeowners. The 0.97 UEF efficiency rating is among the highest available, regardless of size.

One of the unique advantages of the RX130iN is the easy fuel type switching through the settings menu. Homeowners who have both natural gas and propane available appreciate the ability to switch between fuel types in about 30 seconds without any hardware changes. This flexibility is rare in the tankless water heater market.

The unit has been tested successfully at high elevations up to 8,000 feet, making it suitable for mountain homes where many tankless units struggle. The stainless steel construction throughout ensures durability and corrosion resistance, even in challenging environments.

Rinnai no longer includes flush and diverter valves with this unit, which will add approximately $50 to your installation cost. The emergency pressure relief valve is also sold separately, so factor these additional parts into your budget.

Ideal For High-Elevation Homes

The RX130iN is perfect for homes in mountainous areas or high-elevation locations where many tankless units struggle to perform. The unit has been specifically tested and approved for elevations up to 8,000 feet, making it an excellent choice for homeowners in Colorado, Utah, and other mountainous regions who need reliable hot water.

Consider For Smaller Homes

With 7.1 GPM capacity, the RX130iN is ideal for smaller homes with 2-3 bathrooms where the highest flow rates are not necessary. The exceptional 4.6-star rating indicates that customers consistently love this unit, and the smaller size comes with a lower price point while still delivering premium features and efficiency.

9. Takagi TK-540P-NIH – Premium Pick

The Takagi TK-540P-NIH represents the premium end of the Takagi lineup with its integrated recirculation pump and impressive 10 GPM flow rate. This unit combines the legendary Takagi durability with modern convenience features, making it an excellent choice for homeowners who want the best of both worlds.

The integrated recirculation pump eliminates the need for external recirculation systems, providing instant hot water throughout your home. This feature alone can be worth the premium price for homeowners with distant fixtures or those who simply want hot water on demand. The 199,000 BTU input ensures plenty of capacity for even the most demanding homes.

While the TK-540P-NIH has very few reviews, existing customers report exceptional longevity with some units running for 20+ years. This track record is consistent with Takagi’s reputation for building commercial-grade units that last far longer than typical residential equipment.

Ideal For Luxury Homes With Distant Fixtures

The TK-540P-NIH is perfect for luxury homes with bathrooms far from the water heater location. The integrated recirculation pump ensures instant hot water at every fixture, eliminating the wait and water waste that typically occurs with distant fixtures. This feature is particularly valuable in large homes with complex plumbing layouts.

Consider For Long-Term Investment

If you are willing to invest upfront for long-term reliability, the TK-540P-NIH delivers exceptional value over its lifespan. The commercial-grade construction and integrated recirculation mean this unit will likely provide 20+ years of reliable service. While the upfront cost is higher, the per-year cost of ownership becomes very attractive over such a long lifespan.

10. Rinnai V75IN

The Rinnai V75IN is the most reviewed tankless water heater on Amazon with over 2,800 reviews, making it one of the most proven and tested units available. This massive sample size provides confidence in the unit’s reliability and performance. With a 4.4-star rating from thousands of verified customers, the V75IN has clearly earned its reputation as a reliable workhorse.

Homeowners consistently report 10-20 year lifespans from this unit, making it an excellent long-term investment. The super quiet operation is frequently mentioned in reviews, with many users surprised at how quiet the unit is compared to their expectations. The 7.5 GPM flow rate provides plenty of capacity for most 2-3 bathroom homes.

The leak detection feature is an important safety enhancement that can prevent water damage by shutting off the unit if a leak is detected. Enhanced scale detection helps monitor water quality and alerts you when maintenance is needed, extending the unit’s lifespan.

Currently, this unit is out of stock, which may be due to its overwhelming popularity. The 20-45 second delay for hot water at distant fixtures is typical for tankless systems but can be addressed with recirculation systems if instant hot water is a priority.

Ideal For Proven Reliability Seekers

The V75IN is perfect for homeowners who want a unit with a proven track record. With over 2,800 reviews and consistently high ratings, you can be confident that this unit will deliver reliable performance for years to come. The massive number of reviews means you know exactly what to expect from this unit, with no surprises.

Consider For Budget-Conscious Buyers

As one of the more affordable options in the Rinnai lineup, the V75IN delivers excellent value. You get Rinnai reliability and performance at a lower price point than the newer RX series. If you want proven performance without paying for the latest features, the V75IN represents an outstanding value proposition.

Buying Guide: How To Choosing the Best High-End Tankless Water Heaters for Whole Home Use In 2026?

Flow Rate Sizing (GPM Requirements)

Properly sizing your tankless water heater is critical for whole-home satisfaction. Calculate your peak demand by adding up the flow rates of all fixtures that might run simultaneously. A typical shower uses 2.5 GPM, a washing machine uses 2 GPM, a dishwasher uses 1.5 GPM, and each sink uses 0.5-1 GPM. For a 4-bathroom home where you want to run two showers plus a washing machine simultaneously, you need at least 7 GPM capacity.

Climate significantly affects flow rate. In warmer states where groundwater enters at 70°F, you will get the full rated GPM at a 70°F temperature rise. In cold climates where groundwater drops to 40°F in winter, the same unit may only deliver 60-70% of its rated flow because it must work harder to heat the water. Always oversize for your climate, especially in cold regions.

For homes with 5+ bathrooms or very high hot water demand, consider installing multiple units in a cascading configuration. This allows for unlimited capacity while providing redundancy if one unit needs service. Multi-unit installations are increasingly common in luxury homes where hot water demand is exceptionally high.

Fuel Type Selection

Natural gas is the preferred fuel type for whole-home tankless applications due to its lower operating cost and higher capacity. Gas units typically deliver 8-11+ GPM, making them suitable for almost any whole-home application. If natural gas is available at your home, it is usually the best choice for whole-home tankless water heating.

Propane is an excellent alternative when natural gas is not available. Propane tankless units deliver identical performance to natural gas models, with the only difference being the fuel type. The only consideration is propane fuel delivery, you must ensure your propane tank can keep up with the high demand of a tankless unit during peak usage.

Electric tankless units are generally not recommended for whole-home applications in most climates. While they are 99% efficient at the point of use, the massive electrical requirements often necessitate expensive service upgrades. In cold climates, electric units struggle to deliver sufficient flow rates because heating water from 40°F to 120°F requires tremendous electrical power. Electric units are best suited for point-of-use applications or warm climates.

For homeowners considering propane specifically for whole-home applications, our guide to propane tankless water heaters for large homes provides detailed information on propane-specific considerations.

Condensing vs Non-Condensing Efficiency

Condensing tankless water heaters achieve 0.94-0.98 UEF efficiency by extracting heat from exhaust gases that would otherwise be wasted. They use a secondary heat exchanger to capture this heat, which cools the exhaust enough to allow PVC venting. The higher efficiency translates to 10-15% lower operating costs compared to non-condensing models.

Non-condensing units have efficiencies around 0.82-0.85 UEF and exhaust hot gases that require stainless steel or Category III venting. While less efficient, they are typically less expensive upfront and can be more suitable for replacement installations where PVC venting is not feasible. The simplified design can also mean fewer components that might fail.

The payback period for the extra cost of condensing technology is typically 5-8 years depending on your local fuel costs and hot water usage. For homeowners planning to stay in their home long-term, condensing units usually deliver a better return on investment. However, if you are unsure about your long-term plans, the lower upfront cost of non-condensing units might make more sense.

Climate Considerations and Temperature Rise

Temperature rise is the difference between your incoming groundwater temperature and your desired hot water temperature. In southern states where groundwater might be 70°F, you only need a 50°F rise to reach 120°F. In northern states with 40°F groundwater, you need an 80°F rise, which requires significantly more energy and reduces the unit’s flow capacity.

Cold climate homes should always oversize their tankless water heater. A unit rated for 10 GPM at a 35°F rise might only deliver 7 GPM at an 80°F rise. If you live in Minnesota, Maine, or other cold climate states, choose a unit with higher BTU input to ensure adequate capacity during winter months.

Freeze protection is critical for outdoor installations in cold climates. Most high-end units include built-in freeze protection that activates when temperatures drop near freezing. However, this protection requires both gas and electricity to function. If you experience frequent power outages in winter, consider an indoor installation or backup power for your tankless unit.

Smart Features and WiFi Integration

Modern high-end tankless water heaters increasingly include smart features that enhance convenience and efficiency. WiFi connectivity allows you to monitor your unit remotely, adjust temperature settings, and receive maintenance alerts. Some units can even learn your usage patterns and optimize operation accordingly.

The Rinnai Controlr module enables voice control through Alexa and Google Assistant, allowing you to adjust temperature or activate vacation mode with simple voice commands. This integration extends to smart home systems, enabling automation based on your schedule and preferences.

Smart recirculation systems like Rinnai’s Smart-Circ learn when you typically use hot water and schedule recirculation accordingly. This delivers instant hot water when you need it without wasting energy circulating water when you do not. The intelligence of these systems continues to improve, with newer models offering increasingly sophisticated learning algorithms.

Installation Requirements and Costs

Professional installation is strongly recommended for all tankless water heaters and is required for warranty coverage. Installation costs typically range from $1,500 to $3,000 depending on your existing setup. New construction installations are generally less expensive than retrofit situations where existing plumbing and venting must be modified.

Gas line sizing is critical for tankless water heaters. While a traditional tank water heater might use a 1/2 inch gas line, tankless units often require 3/4 inch lines to deliver sufficient gas volume during high-demand periods. Undersized gas lines will prevent the unit from reaching full capacity, resulting in inadequate hot water during peak usage.

Venting requirements differ significantly between condensing and non-condensing units. Condensing models can use PVC venting because their exhaust is cooled by the secondary heat exchanger. Non-condensing units require stainless steel or Category III venting to handle the hot exhaust gases. The venting material alone can add hundreds of dollars to installation costs.

For homeowners interested in alternative high-efficiency options, our guide to hybrid water heaters for energy savings compares tankless technology to heat pump hybrid systems.

Maintenance and Warranty Considerations

Annual maintenance is essential for tankless water heaters, especially in hard water areas. Descaling removes mineral buildup from the heat exchanger, maintaining efficiency and preventing premature failure. In areas with very hard water, you may need to descale twice yearly. Most high-end units include service valves that simplify the descaling process.

Warranty coverage varies significantly between brands and models. Look for units with 10-15 year heat exchanger warranties, as the heat exchanger is the most expensive component to replace. Some brands offer 15-year heat exchanger coverage but only 5-year parts coverage, leaving you responsible for labor costs during the final decade.

Professional installation is almost always required for warranty coverage. DIY installation will void your warranty, leaving you responsible for all repair costs. Given the complexity of proper installation, this requirement makes sense. Improper installation causes most tankless water heater problems, so professional installation protects both your warranty and your investment.

Rebates and Tax Credits

Federal tax credits are available for ENERGY STAR certified tankless water heaters. High-efficiency condensing models with UEF ratings above 0.94 typically qualify for a $200 tax credit under the Inflation Reduction Act. This credit can offset some of the additional cost of high-efficiency models.

Many states offer additional rebates through energy efficiency programs. California, New York, and several other states have rebates ranging from $100 to $1,000 for high-efficiency water heaters. These rebates often have income qualifications and require professional installation by certified contractors.

Local utility companies may also offer rebates for switching from tank to tankless water heaters. Check with your gas or electric utility to see what programs are available in your area. These utility rebates can stack with federal and state incentives, significantly reducing the net cost of your installation.

Frequently Asked Questions

Conclusion

Choosing the best high-end tankless water heater for whole-home use requires careful consideration of your specific needs, climate, and budget. The Rinnai RX199iN stands out as our Editor’s Choice for its exceptional 11.1 GPM flow rate, UEF .98 efficiency, and versatile indoor/outdoor installation capability. For most 3-4 bathroom homes, the Rinnai RX180iN offers outstanding value with its 4.9-star rating and nearly identical performance at a lower price point.

For homeowners who prioritize instant hot water delivery, models with built-in recirculation like the Rinnai REP199eN and Takagi TK-540P-NIH eliminate the wait for hot water at distant fixtures. Budget-conscious buyers will appreciate the proven reliability of the Takagi T-H3S-DV-N with its commercial-grade durability and 15+ year lifespan.

Remember that proper sizing based on your climate and peak demand is critical for satisfaction. Professional installation is required for warranty coverage and ensures your unit performs as intended. With the right high-end tankless water heater properly installed, you will enjoy endless hot water, significant energy savings, and a system that will serve your family reliably for 20+ years.

Explore more tankless water heater options in our tankless water heaters category.