10 Best Rv Tankless Water Heaters of 2025

Tested and Reviewed: Top 10 Rv Tankless Water Heaters deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Ranein

Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Multi-function Controller, On Demand Instant Hot Water Heater, Compatible with all RVs

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Editor's bottom line:

“This rv tankless water heaters is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

We've upgraded.On top of the original. We have upgraded the multi-function remote control. You can view gas usage, voltage, GPM, does anti-freeze device activates, and 9,800ft high altitude available.
Replaces all RV water heatersIt has a 12.8 x 12.8" (without door) opening, easy to replace Suburban & Atwood's 6/10/12 gal tank water heaters and your old water heater with appropriate doors. The fitting door kit is available for purchase in 3 sizes: 15" x 15", 15" x 18", or 18" x 18". Door Requires Additional Purchase, Door ASIN: B0D62541MK
Long time bathDeep fire row design can improve heating efficiency. It can produce up to Max 3.9 GMP hot water and has 65,000 BTU power. It can bring you hot water all the time when there is enough gas and water. There is no need to wait for the water to heat up and take a quick bath like with a tank water heater
Steady temperatureTemperature ranges from 95°F-124°F. Staged combustion technology controls the amount of flame in summer, prevents the water from getting too hot, and saves the limited propane gas available for caravan travel
Save money and comfortThe a tankless RV water heater with a pressure relief valve built into the unit. You don't have to buy and install it separately. It also comes with a PC 6.6 feet intelligent remote controller. This product does not come with a door and needs to be purchased.
Safety and reliabilityBuilt-in forced exhaust fan on top for stable combustion and automatic gas shut-off in case of accidental flame failure. It has an anti-freeze device that automatically warms up when the temperature falls below 42.8°F to prevent freezing
Buy with confidenceThe RV water heater is CSA certified. When installing, please make sure that the voltage of the RV is 12V. We have a professional service team. If you have any questions, please feel free to contact us. We will solve it for you immediately

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Picked by 341 people today

9.5

Save 10%

forimo

RV Tankless Water Heater,65000 BTU,3.9 GPM High Efficiency RV Constant Propane Tankless Water Heater, DC 12V Power, On Demand Instant Hot Water Heater,Multi-Protection for RVers' Everyday Use

10% OffFree Shipping

Main Highlights

Propane RV Water Heater- Propane Tankless Water Heater on demand, Each heater activates only when hot water is needed. The efficient heating coils heat water on demand, using roughly 40% less energy than a traditional tank water heater.Just need 3.6PSI of water pressure,3.9gallons of hot water can be output per minute. The maximum temperature raise is 123°F.
Super High Efficiency- RV water heaters Energy efficient with plenty of hot water, Save time with hot water whenever and wherever you need it, They don't produce the standby energy losses associated with storage water heaters,3.9 GPM Instant gas tankless water heater ,Maximum power output 65000 btu/hour.It can bring you hot water all the time when there is enough gas and water.
Replaces all RV Water Heaters- RV water heater It has a 12.6" x 12.6" opening and comes with a 15" x 15" door, can replace other tankless water heaters. It is low noise and has good vibration resistance, which is made for caravans.
Secure and Reliable- This of ours gas tankless water heater Crafted from stainless steel, exhibits high temperature resistance and corrosion resistance. It also features a built-in oxygen-free copper water tank,Powerful DC motor is more stable than AC motor No noise, ensure stable combustion.Adopting the world's most advanced technology, superior safety and durability,With leakage protection switch, to protect personal safety,It also comes with a smart remote control that displays the target temperature in either Celsius or Fahrenheit.
Easy Assemble and Use- The RV water heater needs to be connected to 12-volt DC power and propane. Inlet and outlet water connections are 1/2 NPT, gas inlet is 3/8" NPT. It is also equipped with a pressure valve that will release the pressure and drain the water when it reaches a certain level of pressure, effectively preventing the tank from bursting.NOTE: For proper operation, this product must be installed in an area with proper ventilation and exhaust.
Wide Application- Easier to carry and use than tank-type water heaters, RV water heaters run smoothly even at high altitudes. Advanced Smart Segmented Combustion technology controls flame size to prevent water from overheating, thus saving limited propane while RV travelling. RV water heaters are perfect for RVs, campers, yachts and other mobile locations where hot water is needed.

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9.5

Save 5%

AMZCHEF

AMZCHEF RV Tankless 65,000BTU Water Heater,CSA Certificated,3.9 GPM Water Heater, with 15 x 15 inches Black Door and Remote Controller,12V,5000FT Endless Hot Water for RV

5% OffFree Shipping

Main Highlights

We've upgraded.On top of the original. We have upgraded the multi-function remote control. You can view gas usage, voltage, GPM, does anti-freeze device activates.
Replaces all RV water heatersAmzchef instant rv hot water heater has a 13 x 13" opening and comes with a 15 x 15" door, can replace other brand water heaters and other tankless water heaters. It is low noise and has good vibration resistance, which is made for RV
Enjoy Endless Hot Water Deep fire row design can improve heating efficiency. It can produce up to Max 3.9 GMP hot water and has 65,000 BTU power. It can bring you hot water all the time when there is enough gas and water. There is no need to wait for the water to heat up and take a quick bath like with a tank water heater
Steady temperatureTemperature ranges from 95°F-124°F. Built-in constant temperature chamber, no overheating of water due to brief opening and closing. Staged combustion technology controls the amount of flame in summer, prevents the water from getting too hot, and saves the limited propane gas available for RV travel
Safety and reliabilityBuilt-in forced exhaust fan on top for stable combustion and automatic gas shut-off in case of accidental flame failure. It has an anti-freeze device that automatically warms up when the temperature falls below 42.8°F to prevent freezing

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9.2

Suburban

Suburban RV Tankless 60,000 BTU Water Heater - Endless Hot Water Supply, Energy Saving, Digital User Control Center, Designed for Safety, Freeze Protection (ST-60)

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Main Highlights

ENHANCED FLAME OUT PROTECTION: The Suburban Tankless RV Water Heater features advanced Flame Out Protection, a critical safety mechanism that instantly cuts the gas supply in response to low propane pressure or burner malfunction, ensuring your safety and peace of mind.
SCALD PROTECTION: Equipped with an internal high-temperature kill switch, this tankless water heater provides reliable Scald Protection. This essential feature safeguards against thermostat malfunctions, maintaining a maximum water temperature of 131° F for safe and comfortable use.
SAFE CHILD LOCK FEATURE: Designed with families in mind, the Suburban Tankless RV Water Heater includes a child lock that prevents outlet temperatures from exceeding 113° F. This feature ensures enhanced safety by protecting children from accidental scalding.
SAVES ENERGY: The tankless feature saves energy by only engaging the burners when water is neededbe it for a hot shower, clean dishes or for hosing off after a day at the beach. The unit comes ready for set-up with an included wall mount digital control center. 6285APW or 6285AEB door is required for installation, sold separately.
FREEZE AND VOLTAGE PROTECTION: This water heater includes Active Freeze Protection, which activates in low temperatures when power and propane are available, preventing freeze damage. Additionally, Voltage Protection shuts down the unit in case of low/high or overcurrent voltage, ensuring reliable and worry-free performance.

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9.0

RUNSAIL

RUNSAIL® [Upgraded Version] RV Tankless Water Heater, 65,000 BTU,Max 3.96 GPM, 15 x 15 Inches Black Door, Build-in Pressure Relief Valve, Winter-Summer Mode Can be Switched Manually or Automatically

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Main Highlights

Easy InstallationThe opening is 13 x 13 inches and the door is 15 x 15 inches. It can replace Sub*** and other tank water heaters, as well as Gir*** and Fur***'s tankless RV water heaters.At the same time, the included instructions and hardware make installation simple.The connecting wires of the wire controller is 10 feet long, not need to buy a battery, plug and play.
New UpgradedThis upgraded RV water heater improves the pressure-bearing capacity of the waterway system. At the same time, It has a built-in pressure relief valve that complies with ANSI & CSA standards. While ensuring safety and machine lifespan, it also avoids frequent dripping and pressure relief of the pressure relief valve. The installation of the water heater will also be simpler,You don't have to buy and install relief valve separately.
High Heating PowerRUNSAIL RV tankless water heater propane provides hot water instantly. With 65K BTU, it can generate a maximum of 3.96GPM. It can support 2-3 faucets simultaneously and minimum water inlet pressure at start-up is 9.5PSI, ideal for RV with low water pressure.
Energy EfficiencyTankless design saves RV space and is eco-friendly. This water heater is over 90% energy efficient, saving you money in the long run. Tankless water heaters tend to last twice as long as regular tank water heaters.
Water Temp is Precisely ControlledTemperature ranges from 95°F-123°F. This RV hot water heater with temperature fluctuation eliminates technology that can eliminate the rising temperature to avoid scalding injuries. Staged combustion technology controls the amount of flame in summer, prevents the water from getting too hot, and saves the limited propane gas available for caravan travel.
No waitingTankless water heaters are better than tanked water heaters for continuous showering of multiple people.It can bring you hot water all the time when there is enough gas and water. There is no need to wait for the water to heat up and take a quick bath like with a tank water heater.

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8.8

Save 21%

BRFCQ

RV Tankless Water Heater, 55000 BTUs Instant Hot Water Heater with 15 x 15 inches Door & Remote Controller, DC 12V MAX 3.9GPM, Propane Gas Power Technology, Compatible with All RVs(Black)

21% OffFree Shipping

Main Highlights

- Compared with traditional tank-type water heaters,BRFCQ RV water heater thermal power up to 55,000 BTU can provide a constant supply of hot water for multiple showers without preheating. RV tankless water heater reaches 51°C within 25 Seconds. You don't have to wait for a long time to enjoy warm hot water, saving time and saying goodbye to long waits.
- The intuitive LED display lets you easily monitor and adjust water temperature, ensuring perfect warmth at your fingertips. Simplified controls make it a breeze to operate, even for first-time users. Please read the instructions for troubleshooting related error codes
- Maximize your RVs space with our lightweight, compact tankless water heater, with door dimensions of 15" x 15" and an opening of 13" x 13", making it easy to install even in tight spaces
- 55,000 BTUs high power output, maximum water flow 3.9 GPM, Whether you're taking a refreshing shower, washing dishes, or handling multiple tasks at once, this water heater ensures consistent, high-volume performance to meet your needs
- Tankless RV water heater vortex technology continuously mixes the water to the desired temperature. If the temperature exceeds safe limits, the dual sensors automatically shut off the power
- The RV water heater requires a 12-volt DC power connection and propane. RV hot water heater will always provide you with hot water as long as there is enough gas and water. NOTE: For proper operation, RV on demand water heater must be installed in an area with proper ventilation and exhaust
& - Travel worry-free with this tankless rv water heater, featuring 9 advanced safety protections, from flame failure protection to overheat prevention, this water heater is built with your safety in mind, ensuring reliable performance in any condition
- Take your adventures to new heights with our RV tankless water heater, engineered for high-altitude performance. Designed to function seamlessly at elevations of up to 9,800 feet, this water heater ensures consistent and reliable hot water, no matter where the road leads

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8.6

LALAHOO

LALAHOO RV Tankless Water Heater, 65,000 BTU, 3.9 GPM, 2.80kPa,12V Instant Endless Hot Water with 15 x 15 inches White Door and Remote Controller LED Display,Compatible with all RV

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Main Highlights

Effortless RV Hot WaterSay goodbye to outdated RV water heaters and opt for the LALAHOO Tankless Water Heater which provides seamless hot water in all terrain and weather conditions. Compatible with Suburban & Atwood & Dometic Water Heaters, and Girard Tankless Water Heat
Endless Hot Water Supply65,000 BTUs of power supports a constant flow of 3.9 gallons per minute hot water for multiple people to use. Our staged combustion technology lets you control the flame size in summers and save on propane gas, while eliminating the need to wait for hot water.
Reliable Stable TemperatureOur RV Tankless Water Heater offers a range of water temperatures from 95°F to 123°F, with temperature fluctuation elimination technology that prevents sudden temperature change resulting in scalds. Enjoy a stable hot water supply whenever you need it without any delays.
Accessories IncludedComes with a built-in pressure relief valve, gas hose, remote control pendant, 15x15 inch door, and a 6.6 feet smart remote. Install and forget about the hassle of hot water supply on your RV travels.
Safety FirstThe LALAHOO RV Water Heater is CSA certified with various safety protection features, including a top-mounted forced exhaust fan, stable combustion, automatic gas cut-off in case of accidental flame failure, and anti-freezing technology.

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8.3

KINGRVER

RV Tankless Water Heater without Door, KINGRVER, Propane Gas, DC 12V, 3 Optional Door Sizes 15"x15", 15"x18" and 18"x18" for Refitment, Compatible with All RVs, Sufficient Power, High Altitude

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Main Highlights

Compatible with All RVs The KINGRVER RV tankless water heater opening size is 12.7" x 12.7". The fitting door kit is available for purchase in 3 optional sizes: 15" x 15", 15" x 18", or 18" x 18". It is easy to replace Suburban, Dometic, and other RV tank/tankless water heater. We also offer customizable EVA Filling Blocks to fit oversized cutouts, ensuring stability and preventing movement of the water heater. They are waterproof and corrosion-resistant. Check our bundles for combination purchase options for easier refitment.
Endless Hot Water Supply The heat output is enough to supply an entire RV with endless hot water, like other higher BTU models, and also save propane. The KINGRVER tankless RV water heater effortlessly supports multiple hot showers and dishwashing without preheating. The Adjustable Temperature ranges from 95°F-123°F.
High altitude Application The KINGRVER RV on-demand Water Heater can operate at above 5000 ft high altitudes. It accommodates the low-oxygen conditions experienced at such elevations. Staged combustion technology modulates the flame intelligently based on seasonal factors, keeping water temperatures steady while reserving limited propane for travelers navigating the region's elevated terrain by caravan. The combined effects deliver an unprecedented high-altitude travel experience.
Built-In Safety Measures A forced exhaust fan ensures stable combustion. A 150PSI pressure relief valve ensures safety. Plus, automatic gas shut-off protects against accidental flame loss. An anti-freeze device protects against low temperatures that could cause freezing. It automatically activates when sensing below 42.8°F, keeping water thawed. Safety and reliability are built in from the top down.
Certified Quality and Expert Support The KINGRVER RV water heater is CSA-certified and has 2 Years of service. We have a 7x24 professional Technical Support team. If you have any questions, please feel free to contact us. From installation guidance to troubleshooting, we provide detailed assistance to ensure your water heater works perfectly.

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Best Value

8.1

Save 29%

GIRARD

GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation - 2022107534

29% Off

Main Highlights

POWERFUL PERFORMANCE At 42,000 BTUs, this continuous hot water heater provides optimal performance for RV plumbing. The quiet, brushless motor runs on 12V power that operates at less than three amps for a nearly noiseless operation
CONSISTENT TEMP The onboard microprocessor monitors incoming cold water temperature, flow rate and outgoing hot water temperature to maintain a steady water flow. It also regulates the burner to maintain a consistent temperature, preventing cold spots and scalding water
HIGHLY EFFICIENT The Girard RV tankless water heater consumes half the LP gas that a six-gallon tank water heater would consume for the same amount of hot water
INTELLIGENT CONTROL With a digital user control panel, you can adjust the temperature setting from 95 to 124°F, toggle between Fahrenheit and Celsius, get a continuous water outlet temperature reading and more. For easy troubleshooting, the control panel also displays error codes if issues arise
Professional Installation is strongly recommended

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8.1

FOGATTI

FOGATTI RV Tankless Water Heater, 66,000 Highest BTU, InstaShower 9 Pro, Gen 3, RV Hot Water Heater, Built-in Mixing Tank, 15x15 Inches Black Door, Remote Controller, Ideal for Everyday Use by RVers

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Main Highlights

Gen 3 RV Tankless Water Heater: The 3-generation InstaShower RV water heater now boasts 66,000 BTU and supplies hot water at up to 3.6 GPM. This allows simultaneous use in the RV's bathroom and kitchen with plenty of capacity. Unlike traditional tank water heaters, it provides a stronger flow for single users and eliminates waiting time when multiple people are showering.
Pushing Performance Limits: FOGATTI RV tankless water heater, equipped with a high-quality heat exchange system, operates smoothly even at altitudes of 9,800 feet. The upgraded NIDEC fan delivers 300Pa of power, ensuring hot water supply even in winds up to 9 on the Beaufort scale.
Upgraded Alternative to Tank Water Heaters: Fogatti RV water heater is versatile and fits various applications. With a 13 x 13 inch opening, it can replace Suburban & Atwood 6-gallon tank water heaters and Girard & Furrion tankless water heaters. To replace a 10-gallon tank water heater, retrofit it with an 18 x 18 inch door.
Unparalleled Bathing Experience: The RV tankless water heater delivers instant hot water at 3.6 GPM with precise temperature control within ±1. The burner adapts to the season: two rows of flames in summer to prevent overheating, and all five rows in winter to ensure warmth. The mixing tank further stabilizes extreme temperatures.
Save Money and Effort: Fogatti cares about your convenience and has included a 150 PSI pressure relief valve, so you don't need to purchase and install it separately. Additionally, it comes with a 15 x 15-inch door, a 17.64 x 17.64-inch trim ring, and an intelligent remote controller that can be used up to 6.6 feet away.
Safety and Reliability: We have included a filter screen to remove large particles of dust and sand from the water. The product is CSA certified and features multiple safety measures, including a built-in forced exhaust fan on top, stable combustion, automatic gas shut-off in case of flame failure, and anti-freeze protection.

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Our Best Overall Choice

Best Choice

9.7

Ranein

Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Multi-function Controller, On Demand Instant Hot Water Heater, Compatible with all RVs

Free Shipping

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

We've upgraded.On top of the original. We have upgraded the multi-function remote control. You can view gas usage, voltage, GPM, does anti-freeze device activates, and 9,800ft high altitude available.
Replaces all RV water heatersIt has a 12.8 x 12.8" (without door) opening, easy to replace Suburban & Atwood's 6/10/12 gal tank water heaters and your old water heater with appropriate doors. The fitting door kit is available for purchase in 3 sizes: 15" x 15", 15" x 18", or 18" x 18". Door Requires Additional Purchase, Door ASIN: B0D62541MK
Long time bathDeep fire row design can improve heating efficiency. It can produce up to Max 3.9 GMP hot water and has 65,000 BTU power. It can bring you hot water all the time when there is enough gas and water. There is no need to wait for the water to heat up and take a quick bath like with a tank water heater
Steady temperatureTemperature ranges from 95°F-124°F. Staged combustion technology controls the amount of flame in summer, prevents the water from getting too hot, and saves the limited propane gas available for caravan travel
Save money and comfortThe a tankless RV water heater with a pressure relief valve built into the unit. You don't have to buy and install it separately. It also comes with a PC 6.6 feet intelligent remote controller. This product does not come with a door and needs to be purchased.
Safety and reliabilityBuilt-in forced exhaust fan on top for stable combustion and automatic gas shut-off in case of accidental flame failure. It has an anti-freeze device that automatically warms up when the temperature falls below 42.8°F to prevent freezing
Buy with confidenceThe RV water heater is CSA certified. When installing, please make sure that the voltage of the RV is 12V. We have a professional service team. If you have any questions, please feel free to contact us. We will solve it for you immediately

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RUNSAIL® [Upgraded Version] RV Tankless Water Heater, 65,000 BTU,Max 3.96 GPM, 15 x 15 Inches Black Door, Build-in Pressure Relief Valve, Winter-Summer Mode Can be Switched Manually or Automatically

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