Our readers keep the lights on and my morning glass full of iced black tea. As an Amazon Associate, I earn from qualifying purchases.11 Best 60 Gallon Water Heater | 7.9 GPM for 3 Bathrooms

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This is the unit you spec when you want the highest possible flow rate and the best fuel efficiency in one package. The RXP199iN delivers up to 11.1 GPM from 199,000 BTU, and with a 0.98 UEF rating, it wastes less gas than any non-condensing alternative on this list. The built-in Smart-Circ recirculation pump learns your household routine and pushes hot water through the pipes before you even turn on the tap — a feature that saves both water and waiting time in a large home.

The condensing design allows PVC venting, which simplifies retrofits in homes that previously used metal flues. It also installs indoors or outdoors with the appropriate vent cap, giving you placement flexibility. The unit automatically adapts to natural gas or propane, so you do not need to commit to a specific fuel type at purchase time. That versatility alone justifies the premium tier for homeowners who may switch fuels in the future.

Real-world owners report replacing 40- and 50-gallon tanks with this Rinnai and enjoying unlimited hot water for households of five adults. The recirculation pump is effective, though some users note it is louder than expected and the control app has limited functionality. Professional installation is strongly recommended to preserve the warranty and ensure correct gas line sizing.

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Rheem backs this indoor non-condensing unit with a 15-year heat exchanger warranty and 5 years on parts — the longest protection in this comparison. That warranty reflects the confidence Rheem places in its oxygen-free copper heat exchanger and straightforward design. The 8.4 GPM flow rate and 157,000 BTU output are well matched for 2-3 bathroom homes with simultaneous shower and appliance demand.

Installation requires Category III stainless steel venting, which is more expensive than PVC but standard for non-condensing units. The unit uses standard 120V power and includes electric ignition. The available temperature range spans 100°F to 140°F with a default of 120°F. Owners consistently report silent operation and measurable drops in electric bills after replacing tank heaters, with only minor gas cost increases.

The trade-off with this Rheem is the learning curve for DIY installation — the gas and water connections require careful planning and multiple fittings. Once installed, however, users describe years of trouble-free operation. If you prioritize warranty length and brand reliability over smart features, this is the strongest candidate.

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This condensing unit targets the efficiency-minded buyer who wants the energy savings of a dual heat exchanger system without paying Rinnai prices. The 0.91 UEF rating translates to roughly 17% lower gas consumption compared to a standard non-condensing tankless unit. The stainless steel secondary heat exchanger captures waste heat that would otherwise escape through the flue, while the primary oxygen-free copper exchanger handles the main heating load.

At 163,000 BTU and up to 9.38 GPM, the RTC68iN can supply three showers running at 2 GPM each simultaneously with 105°F output. The sealed combustion design keeps operational noise low, and the intelligent water mixing valve maintains stable temperature even when multiple fixtures open or close. The condensation drainage requires a nearby floor drain or a neutralizer kit to prevent pipe corrosion over time.

Owner feedback highlights consistent temperature output and straightforward professional installation. The unit is CSA certified with eight built-in safety protections including freeze prevention that activates at 41°F. Budget for an external condensate neutralizer kit, which is not included. For homes in warmer climates where the 9.38 GPM peak flow is achievable, this is a compelling value.

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Westinghouse brings smart home integration to the non-condensing category with this 180,000 BTU indoor unit. The WiFi app control lets you adjust temperature, monitor operating status, and receive maintenance alerts from anywhere. The self-modulating technology adjusts gas and water flow dynamically to maintain output temperature within ±1°F — a spec that translates to no cold bursts when someone flushes a toilet during your shower.

With 7.9 GPM capacity and support for 3-5 fixtures, this unit fits 2-3 bathroom homes that want the convenience of remote control without upgrading to a condensing model. The CSA certification, integrated freeze protection, and variable-speed combustion fan provide reliable year-round performance. Standard 3/4-inch NPT connections simplify plumbing integration for most residential systems.

Users describe the installation process as straightforward with clear instructions, though finding a contractor familiar with tankless setups was a hurdle for some. Once running, the unit delivers consistent hot water at the set temperature — owners report setting it at 116°F and no longer needing to mix cold water. The smart features work reliably, though some early adopters noted the app interface could be more polished.

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This FOGATTI model is purpose-built for outdoor installation, eliminating the need for indoor venting and saving valuable floor space. The 180,000 BTU burner delivers up to 8.1 GPM, and the bottom-mounted fan design prevents smoke backflow while extending the unit’s lifespan in exposed environments. The included remote control panel mounts inside your home, so you can adjust the temperature without stepping outside.

The 304 stainless steel burner and oxygen-free copper heat exchanger handle the thermal stress of outdoor temperature swings. The four-stage combustion system and water servo technology maintain ±1°F precision across seasonal changes. FOGATTI backs the unit with a 2-year full warranty and 5 years on the heat exchanger, which is standard for this price tier.

Owners praise the easy installation and immediate hot water delivery. The freeze protection activates when temperatures drop, though some users in central Florida still experienced freezing issues during unexpected cold snaps — the manual explicitly requires draining the unit if temperatures fall below 5°F for extended periods. The compact 26.2 x 17.1 x 7.1-inch footprint fits easily against an exterior wall.

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The APUS 190K pushes the BTU rating to 190,000, delivering 8.1 GPM in a compact outdoor chassis. The key differentiator here is the 10-level wind resistance rating, making this unit a strong choice for exposed coastal areas or high-wind regions where outdoor tankless units commonly struggle. The electric anti-freeze protection and rugged weatherproof construction allow year-round operation in most climates.

The WiFi app control and wired remote provide dual temperature management paths. The 100% oxygen-free copper heat exchanger with intelligent staged combustion technology claims 20% energy savings over standard non-condensing units. The 0.79 GPM minimum activation flow is notably low, ensuring the unit fires up even with low-flow fixtures or weak water pressure — a common pain point with tankless heaters in older homes.

Customer feedback consistently mentions quiet operation and successful self-installation. The 3/4-inch water and gas connections simplify hookup for experienced DIYers. The 2-year full warranty is standard, but some users had to purchase a separate valve body not included in the box — check the package contents before starting your install. Overall, this is a well-rounded outdoor unit for homes needing high wind tolerance.

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Rheem’s RTG-84XLN-3 is the outdoor non-condensing workhorse that plumbers trust. The 8.4 GPM capacity and 180,000 BTU are paired with a durable metal cabinet and wall-mount design that has been on the market for years. The hot-start programming eliminates the cold water sandwich effect between back-to-back showers — a specific engineering tweak that matters in households where family members shower sequentially.

At 39.3 pounds and 20.75 inches tall, this is one of the lighter and more compact outdoor units available, making solo installation more manageable. The natural gas connection and standard 120V power requirement keep the install simple for any qualified professional. Rheem’s nationwide parts availability is a practical advantage — if a component fails years down the line, finding a replacement is straightforward.

Owners consistently describe the unit as working perfectly with no issues after installation. The most common observation is that hot water takes longer to arrive at the tap compared to a tank heater — this is inherent to tankless systems and not a defect. The unit saves space, energy, and water compared to a tank, and multiple reviewers successfully replaced 50-gallon tanks with this Rheem.

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The FOGATTI 170S packs 170,000 BTU and 7.5 GPM into a footprint that is one-third the size of a traditional tank heater. That space-saving advantage matters in tight utility closets and basements where floor space is at a premium. The unit supports 3-5 outlet points simultaneously, making it suitable for 2-3 bathroom homes with average simultaneous demand.

The water servo technology and four-stage combustion system work together to maintain ±1°F temperature accuracy regardless of seasons. FOGATTI uses a high-efficiency copper heat exchanger paired with a 304 stainless steel burner for corrosion resistance. The minimum operating pressure of 15 PSI allows installation in homes with weaker municipal water pressure, and the CSA certification covers North American safety standards.

Owners report the unit works flawlessly when operational, with instant hot water and efficient performance. The 2-year full unit warranty and 5-year heat exchanger warranty match the mid-range standard. However, some users experienced intermittent ignition failures — a recurring theme with some FOGATTI units. A qualified installer familiar with gas pressure adjustment can often resolve this. Overall, this is a strong value pick if you have a good installer.

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This is the propane-specific outdoor version of the Westinghouse smart tankless line. The 180,000 BTU output and 8.1 GPM flow rate are identical to the natural gas indoor version, but this unit comes pre-configured for liquid propane and includes an indoor wire control panel. For homes in rural areas or off-grid properties where propane is the only fuel option, this is the most polished smart option available.

The outdoor design eliminates venting costs, and the CSA certification covers all relevant North American safety standards. The integrated freeze protection and variable-speed combustion fan handle outdoor temperature swings. The self-modulating technology maintains ±1°F stability, and the included remote panel mounts inside your living space for easy temperature changes without braving the elements.

Owner experiences mirror the indoor version — easy installation with clear instructions, consistent hot water delivery, and the convenience of setting a precise temperature (116°F is a popular setting) without mixing cold water. The unit is quiet enough that owners in attached garages do not find it intrusive. The maximum temperature of 165°F is higher than most competitors, providing extra headroom for homes with large storage tanks or radiant floor heating systems.

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The APUS Q20NG brings two features rarely seen at this price point: a built-in booster pump that increases flow by up to 130%, and a zero-cold-water recirculation technology called single-circulation that eliminates the waiting period for hot water. The 140,000 BTU burner delivers 6.8 GPM, enough for 2 showers and 2 sinks simultaneously. The booster pump compensates for undersized supply lines or low municipal pressure, making this a smart choice for older homes.

The smart season comfort mode automatically adjusts outlet temperature based on incoming water temperature, so you do not have to manually tweak settings between summer and winter. The Tuya app integration provides remote temperature adjustment from 95°F to 140°F. The 24/7 ECO smart cycle claims 40% energy savings compared to conventional tankless heaters by circulating small amounts of warm water through the pipes periodically.

Customer reviews highlight the recirculation feature as the primary selling point — it genuinely delivers near-instant hot water to distant fixtures. However, some buyers received units that failed to ignite out of the box, and customer service responsiveness was inconsistent. The single-wall exhaust pipe (2-3/8 inches) was smaller than some standard residential flues, causing compatibility issues. For budget-conscious buyers willing to accept some risk, the feature set is unmatched.

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The MIZUDO GEN 3 is the only unit on this list that ships with both indoor and outdoor installation options from the box. With 120,000 BTU and 5.1 GPM, it targets smaller households (1-2 people) where a full 8 GPM unit would be oversized. The phosphorous-deoxidized copper heat exchanger and stainless steel combustion chamber provide industrial-grade durability at an entry-level price point. The CSA certification covers all the essential safety protections including freeze prevention and flame failure detection.

The WiFi app control lets you adjust temperature and monitor energy usage remotely. The unit maintains ±1°F temperature stability during simultaneous use of two fixtures. Indoor installation requires a 3-inch OD vent pipe system, while outdoor conversion needs a separate vent cap kit. This flexibility allows homeowners to start with an indoor setup and later move the unit outside if needed — a unique advantage for remodeling projects.

Owner reviews consistently praise the easy installation, quiet operation, and quick heating response (35-40 seconds to reach hot water at upstairs showers). Some users noted the gas fitting uses a non-standard 1/2-inch MIP thread, requiring a purchased adapter. The 80K BTU version (sold under the same listing) is sufficient for 1-2 people but would struggle with simultaneous shower and dishwasher use. For small homes or apartments converting from electric tank heaters, this is a functional and affordable solution.