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10 Best Tankless Rv Water Heaters 2025 in the United States
#1
Winner
GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation - 2022107534
The GIRARD Tankless RV Water Heater stands out with its powerful performance, delivering 42,000 BTUs, which means you can always expect a steady supply of hot water in your RV. The 12V power operation and quiet, brushless motor ensure that it runs smoothly and quietly, which is great for a comfortable RV experience. Additionally, it is lightweight at 22 pounds and has compact dimensions (12.5"W x 12.5"H), making it a practical choice for the confined spaces of an RV.
Rating
10.0
Chosen by1,330
Energy Efficiency
Size and Weight
Temperature Control
Most important from
1515 reviews
#2
FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, Gen 2, with 15 x 15 inches Black Door and Remote Controller, DC 12V, Best High Altitude Performance, Ideal for RVers' Everyday Use
The FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, Gen 2, is a versatile and robust option for RVers. One of its standout features is its high altitude suitability mode, which ensures smooth operation even at elevations as high as 9,800 feet, making it ideal for adventurers traveling through mountainous regions. With a high flow rate of up to 2.9 GPM and a powerful 55,000 BTU output, this heater provides continuous hot water for extended periods, which is a significant upgrade from traditional tank water heaters that can run out quickly.
Rating
10.0
Flow Rate
Size and Weight
Temperature Control
Most important from
894 reviews
#3
Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Thermostatic Chamber and Multi-function Controller, On Demand Instant Hot Water Heater
The Ranein 65,000 BTU RV Tankless Water Heater stands out for its high performance and adaptability. With a maximum flow rate of 3.9 gallons per minute, it ensures a steady supply of hot water, which is a significant upgrade over traditional tank water heaters that can run out of hot water quickly. The heater operates on propane gas and requires a 12V power source, making it suitable for most RVs. It is also CSA certified, ensuring safety and reliability during use.
Rating
10.0
Flow Rate
Energy Efficiency
Temperature Control
Most important from
549 reviews
Top 10 Best Tankless Rv Water Heaters 2025 in the United States
#1
Winner
10.0 score
GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation - 2022107534
GIRARD Tankless RV Water Heater, 12V Power, 42,000 BTUs, Quiet Operation, Onboard Microprocessor, Digital User Control Panel, Freeze Protection, Easy Installation - 2022107534
Fuel Type: LP gas
Energy Efficiency: Half fuel consumption of traditional heaters
Size and Weight: 12.5"W x 12.5"H, 22 pounds
Temperature Control: Onboard microprocessor, digital control panel
Installation and Maintenance: Professional installation, freeze protection
Chosen by 1330 this week
FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, Gen 2, with 15 x 15 inches Black Door and Remote Controller, DC 12V, Best High Altitude Performance, Ideal for RVers' Everyday Use
FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, Gen 2, with 15 x 15 inches Black Door and Remote Controller, DC 12V, Best High Altitude Performance, Ideal for RVers' Everyday Use
Flow Rate: 2.9 GPM
Fuel Type: Propane
Energy Efficiency: Staged combustion
Size and Weight: 15 x 15 inches
Temperature Control: Remote controller
Installation and Maintenance: Pressure relief valve
Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Thermostatic Chamber and Multi-function Controller, On Demand Instant Hot Water Heater
Ranein 65,000 BTU RV Tankless Water Heater, High Altitude Available, 12V, CSA Certificated, with Thermostatic Chamber and Multi-function Controller, On Demand Instant Hot Water Heater
Flow Rate: 3.9 Gallons Per Minute
Fuel Type: Propane gas
Energy Efficiency: CSA certified
Size and Weight: 15"W x 15"H, 31.2 lbs
Temperature Control: 95°F to 124°F
Installation and Maintenance: Replaces Suburban and Atwood heaters
FOGATTI RV Tankless Water Heater, InstaShower 7, 3 Optional Door Sizes 15"x15", 15"x18" and 18"x18" for Refitment, DC 12V, Optimized Summer Comfort Performance, Ideal for RVers' Family Use
FOGATTI RV Tankless Water Heater, InstaShower 7, 3 Optional Door Sizes 15"x15", 15"x18" and 18"x18" for Refitment, DC 12V, Optimized Summer Comfort Performance, Ideal for RVers' Family Use
Flow Rate: 2.5 gallons per minute
Fuel Type: propane gas
Energy Efficiency: 84%
Size and Weight: 12.7" x 12.7", 25.7 lbs
Temperature Control: 95°F to 123°F, remote control
Installation and Maintenance: wall mount; gas supply needed
Related Products
Up to 50% off
65,000 BTU 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, High Altitude
65,000 BTU 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, High Altitude
Flow Rate: 0.5 GPM
Fuel Type: propane
Energy Efficiency: High Efficiency
Size and Weight: 12.7" x 12.7", 24.6 lbs
Temperature Control: reliable, dry combustion, safety features
Installation and Maintenance: internal mount, CSA-certified, 2-year warranty
RV Tankless Water Heater, RVPart Pro GT42, with 15"x15" Black Door and Remote Controller, DC 12V, 24/7 Technical Support, High Altitude, Easy Installation, Compatible with All RVs, Black
RV Tankless Water Heater, RVPart Pro GT42, with 15"x15" Black Door and Remote Controller, DC 12V, 24/7 Technical Support, High Altitude, Easy Installation, Compatible with All RVs, Black
Flow Rate: 2.4 GPM
Fuel Type: Propane
Energy Efficiency: Energy-efficient
Size and Weight: 15"W x 15"H, 31 lbs
Temperature Control: 95 to 123°F
Installation and Maintenance: Built-in, 12V DC supply
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Buying Guide for the Best Tankless Rv Water Heaters
Choosing the right tankless RV water heater can significantly enhance your comfort while traveling. Unlike traditional water heaters, tankless models provide hot water on demand, which means you don't have to wait for a tank to heat up. This can be particularly useful in an RV where space and resources are limited. To make an informed decision, it's important to understand the key specifications and how they align with your needs.Flow RateFlow rate, measured in gallons per minute (GPM), indicates how much hot water the heater can produce at a time. This is crucial because it determines whether you can run multiple fixtures simultaneously without losing hot water. For instance, a flow rate of 2-3 GPM is typically sufficient for one shower or a sink, while 4-6 GPM can handle multiple fixtures. Consider your usage patterns: if you often use hot water in more than one place at a time, opt for a higher flow rate.
Fuel TypeTankless RV water heaters can be powered by propane, electricity, or a combination of both. Propane models are popular for their efficiency and ability to heat water quickly, making them ideal for off-grid use. Electric models are easier to install and maintain but may require a significant power supply, which can be a limitation in some RVs. Dual-fuel models offer flexibility but can be more expensive. Choose based on your RV's power setup and your travel habits.
Energy EfficiencyEnergy efficiency is measured by the unit's energy factor (EF), which indicates how well the heater converts fuel into hot water. A higher EF means better efficiency and lower operating costs. For RVs, where conserving energy is often a priority, look for models with a high EF rating. This not only saves fuel or electricity but also reduces your environmental footprint.
Size and WeightThe size and weight of the tankless water heater are important considerations, especially in an RV where space is limited. Compact and lightweight models are easier to install and fit into tight spaces. However, ensure that the unit is still powerful enough to meet your hot water needs. Measure the available space in your RV and compare it with the dimensions of the heater to ensure a proper fit.
Temperature ControlTemperature control features allow you to set and maintain your desired water temperature. Some models offer digital displays and precise temperature settings, which can enhance comfort and prevent scalding. Basic models may have manual controls that are less precise but still functional. Consider how important precise temperature control is for you and choose a model that offers the level of control you need.
Installation and MaintenanceEase of installation and maintenance can vary between models. Some tankless water heaters are designed for DIY installation, while others may require professional help. Maintenance features, such as easy access to components and self-cleaning functions, can prolong the life of the unit and reduce the need for repairs. If you're handy and prefer to do things yourself, look for user-friendly models. Otherwise, consider the availability of professional service options.