10 Best Propane Tankless Water Heaters: Reviewed April 2021

The propane water heaters are best known for the safety and energy efficiency marking the highlights of 2021.

Do you happen to be tracing the best thermal efficient, extremely safe, and cost-effective alternative for your water heaters? The ultimate way out is the best propane tankless water heater with high effectiveness, portability, large water capacity, and ultimate voltage stabilization to facilitate you with the ideal means.

Best Propane Tankless Water Heaters

Thereby, this article offers a list of the ten best propane tankless water heaters based on portability, energy efficiency, water capacity, and temperature control.

Founding your research principles on the above-mentioned attributes, you can choose the right product for you.

1. Rinnai V75iP – Best for Indoor Use

  • Weight: 45.6 pounds.
  • Flow Rate: 7.5 GPM.
  • Dimensions: 14.04 x 9.27 x 26.9 inches.
1. Rinnai Indoor Heater - Propane On Demand Water Heater

Rinnai tankless propane heaters have gained a certain reputation with the high efficiency and proper control system, and the Rinnai indoor is no exception. The V series of the company has included all the essential features at a limited price. Furthermore, energy efficiency and hot water flow are the highlights of this model.

Likewise, because it is an indoor version, it is highly suitable for small to medium-sized houses without taking much space. It can deliver up to 7.5 to 8 gallons of water with smooth flow and a high flowing rate. Thereby, if you are a resident in a cold climate region, this is phenomenal for you with less fuel consumption, higher energy effectiveness, and high-temperature settings.

Finally, the smart remote control is by far the best feature you are looking for. It offers an app to set up the temperature setting, cost reduction, and monitor the water flow throughout the day. The holiday mode comes in handy when you are away or not using the heater and cuts the annual cost. The unit is highly durable, with a ten-year warranty that adds peace of mind for the user.


  • It comes with the software.
  • Smooth water flow.
  • High energy efficiency.
  • Allows monitoring.


  • Limited temperature setting.
  • Fan is noisy.

Finally, if you are looking for a power-efficient model for your house to assist you in the cold winters without much cost, this Rinnai indoor tankless unit is especially for you. The smart app is highly performance-oriented and ensures the heater’s maximum usage with the least energy and cost consumption. Overall, this is one of the best propane tankless water heaters for cold climates with its smooth hot water flow and enough power.

Read: Best Outdoor Tankless Water Heater | The Aqua Picks

2. Rinnai V65EP – Best for Outdoor Use

  • Weight: 47.4 pounds.
  • Flow Rate: 6.5 GPM.
  • Dimensions: 9 x 14 x 23 inches.
Rinnai Outdoor Heater - Best Tankless Water Heater Propane

First and foremost, the Rinnai Outdoor tankless is in the mainstream with the condensing operation, i.e., it contains two heat exchanges. With the highest power efficiency, it can transfer at least 0.82 energy for smooth water flow. It is an outdoor unit that can come in handy for camping with its compact size.

Likewise, it comes with an MC-91-2 temperature adjustment device, and the unit is highly complicated to install. It is recommended to get it installed by someone who has previous installation experience. The temperature can also be controlled with a remote up to 120 degrees Fahrenheit that is enough for an outside model.

Lastly, coming to the maintenance and cleaning, it is a premium unit that needs a decent cleaning value. The water filter just above the heating technology needs to be maintained regularly. Otherwise, the water heater and the pressure valve need annual cleaning. Overall, its monitoring system, compact size, outdoor availability, and high-temperature control are what you need, and the unit delivers.


  • High power efficiency.
  • Comes with remote.
  • Budget-friendly.
  • Eco-friendly unit.


  • Needs decent cleaning.
  • Not for large homes.

Finally, designed with its compact size, high-temperature control techniques, efficient safety protocol, and limited price, the Rinnai V65eP outdoor is one of the best propane tankless water heaters for cold climates. Hence, all the features ensure safety with peace of mind. So, if you are looking for a safe and effective unit for your home, this one is absolutely best for you.

Read: Best Tankless Water Heaters 2021: Reviews & Buying guide

3. Eccotemp L5 – Best for Camping

  • Weight: 14 pounds.
  • Flow Rate: 1.5 GPM.
  • Dimensions: 14.5 x 11.5 x 4.5 inches.
Eccotemp L5 - Top Propane Hot Water Heater

First and foremost, highly efficient and budget-friendly, this Eccotemp L5 is popular among enthusiastic people about outdoor trips or camping. It works on D-cell batteries that are exchangeable and offer great safety with an automatic shutter. After 20 minutes of the runtime, the unit automatically shuts down to ensure the user’s safety standards necessary for the user’s peace of mind.

Likewise, the flame overpowers the wind in any case that makes it ideal for outdoor camping activities. It also contains a gas regulator that assists the user in energy and gas consumption. The system uses gas only when the water starts flowing, which mitigates excessive fuel consumption. Apart from this, the package comes with a shower adapter, shower head, and many others that is an additional service for users.

Last but not least, it offers a capacity of 1.6 gallons per minute that can be a little less for some users. Yet, considering it as a compact unit with enhanced portability and for outdoor activities, it is enough to work for a few people with smooth hot water flow. Simultaneously, it is elementary and convenient to install and uses enough power to support the user.


  • Ideal for camping.
  • Enhanced portability.
  • Easy installation.


  • Limited runtime.

Finally, the Eccotemp is a remarkable option as the best propane tankless water heater for camping, with all the prerequisites fulfilled for the journey. Everything is ensured for the user’s facilitation, from power efficiency to portability, safety to smooth water flow, and fuel consumption. Further, the accessories package in a limited price range offers an additional treat for the user.

4. Eccotemp FVI12-LP – Best for Small House

  • Weight: 33 pounds.
  • Flow Rate: 4.0 GPM.
  • Dimensions: 24.75 x 15.25 x 6 inches.
Eccotemp Liquid - Propane Hot Water Heaters

Eccotemp Liquid FVI-12 is an ideal, effective and safe unit considering that it offers high thermal efficiency on a high propane flame while passing through the heat exchange. Thereby, energy consumption and power loss are mitigated automatically. Further, the build-up is highly sturdy and credible, ensuring safety and adding peace to the user’s mind.

Similarly, talking about the installation and usage, it is an easy-to-use and easy-to-install device that demands no previous experience. It is designed specifically for small houses, cabins, and so on. The protection is ensured by the stainless steel vent kit that ensures appropriate and well-suited ventilation for small and reserved places.

Additionally, the highly appreciated factor of this model is digital temperature control. This digital control can easily be read on display and has the capacity to go up to 120 degrees in a 30-80 psi area. Coupled with this, a safe electronic ignition system saves the voltage, making it energy-efficient and safe.


  • High thermal efficiency.
  • Advanced safety insurance.
  • Sturdy construction quality.
  • Easy to install.


  • Temperature adjustments issues.

In the end, this Eccotemp is a unit designed for small to medium houses with high power efficiency and energy safety. It offers high durability and somewhat portability that assist the user in achieving the utmost reliability with the easy-to-use digital temperature control. Overall, it is one of the best propane tankless water heaters for tiny houses that can be your ultimate pick.

5. Camplux AY132B – Best for High Altitude

  • Weight: 14 pounds.
  • Flow Rate: 1.32 GPM.
  • Dimensions: 14.8 x 11.42 x 4.33 inches.
Camplux 5L Outdoor Portable Propane Tankless Water Heater'

Being one of the best outdoor propane water heaters, this Camplux unit has a high capacity to store water and deliver almost 10 gallons without any compromise per minute. It works with the two D-cell batteries placed on the water cylinder to ensure high power flow and temperature settings. With an area between 2.8 and 110 PSI, it offers high water pressure that facilitates the user.

Similarly, the heater is highly portable with a compact size and lightweight that further comes with a gas regulator, shower head, and an essential adaptor. These accessories add value to the overall unit coupled with the energy-saving technology. With this energy-saving technology, users can adjust the temperature setting in extreme weather conditions that cut the overall cost.

Furthermore, for safety without compromising the power effectiveness, the unit contains a power drain plug. This power plug prevents any damage to the heater from the freezing or utterly cold climate. Despite all this, the power output is highly impressive with the 68,000 BTUs that are considered highly efficient and offer great assistance. Thereby, it is categorized in the list of best propane tankless water heaters for high altitude with this power and safety.


  • High protection quality.
  • Impressive power output.
  • Offers high temperature.
  • Work with the main power source.


  • Runtime limitation.
  • Showerhead might issue.

In the end, this unit is highly efficient for the higher altitudes with the robust buildup construction and the safety drain plug that ensures the safety impaired with the main power source. Further, the thermal efficiency and high-temperature setting is the foremost requirement in icy conditions, and here, this Camplux 5L outdoor water heater is your absolute choice.

6. Rinnai RL94eP – Best for Commercial Use

  • Weight: 44.2 pounds.
  • Flow Rate: 9.4 GPM.
  • Dimensions: 9.6 x 14.04 x 24.29 inches.
Rinnai RL Series Propane Tankless Hot Water Heater

First and foremost, the Rinnai RL-94 does a phenomenal job providing efficient and endless power to the entire large household with its high temperature and energy capacity. Despite its gigantic thermal efficiency and outdoor installation, it comes with a compact size that assists the user. Further, the durable and sturdy construction is a long term investment for you.

Furthermore, the unit comes with a Rinnai Circ Logic technology that finds its principles on the circular motion cycle to ensure smooth energy distribution. To enhance the water pressure, it can also be coupled with an external pump. It has an average 9.4 GPM flow rate that makes it one of the best tankless water heaters for radiant heat and commercial use.

Finally, talking about the installation and safety, the model has some considerations and effective features. Safety is undoubtedly achieved with the temperature lock function that ensures ideal protection. However, the installation needs a technician or an individual with previous experience because it is not as easy as it seems.


  • Robust buildup quality.
  • Ideal for commercial places.
  • Remarkable power capacity.
  • Enhanced safety standards.


  • Complicated installation.

Finally, this Rinnai RL series RL-94 propane is a remarkable choice for anyone searching for the ultimate power, high temperature, energy efficiency, portability, and durability in one unit. It is an outdoor installation system with enough power to serve large places with a temperature lock technology that ensures a high water flow with less fuel consumption and enhanced safety.

7. Camplux CA318 – Best for Rvs

  • Weight: 27.7 pounds.
  • Flow Rate: 2.64 GPM.
  • Dimensions: 14.37 x 4.72 x 25.39 inches.
Camplux Indoor Tankless Propane Water Heater

To begin with, Camplux CA528 is highly efficient with its non-stop energy flow, voltage stabilization, and high-temperature settings. It is often considered the best propane tankless water heater for RV because of its 5.28 GPM capacity, 120 voltage power source, and high-temperature settings coupled with a high propane flame.

Similarly, the unit is CSA certified when it comes to protection and safety insurance. The working mechanism ensures the deoxidized copper exchange with the high temperature and corrosion-free technology. For further protection, it contains the anti-freezing technology to work as a shield and allows efficient heating. Finally, the safe ignition method adds value to the unit.

Moreover, the model contains the PCB frequency conversion that is an ingenious technology responsible for energy and power efficiency. Thereby, Camplux ensures the cost reduction and mitigation of energy consumption. However, to maintain this efficiency, it is recommended by the company not to use the model for higher altitudes.


  • High power stabilization.
  • Enhanced construction quality.
  • CSA certified.
  • It comes with safe ignition.


  • Lacks portability.

In essence, this Camplux is best known for its high safety standards, enhanced durability, power efficiency, temperature control, and cost reduction. If you are tracing all these essential features in a propane tankless water heater, it is designed for you. It offers easy installation and usage with the best performance effectiveness.

8. Camplux CA528-LP – Best for Households

  • Weight: 32.3 pounds.
  • Flow Rate: 2.64 GPM.
  • Dimensions: 22.2 x 14 x 5.9 inches.
Camplux 12L Indoor Tankless Propane Water Heater

Firstly, the Camplux 12 L highlights its power efficiency, LED light display, and sturdy stainless steel construction. It comes with robust stainless steel construction that ensures high water pressure and durability while enhancing overall safety. It contains easy to install technology with high voltage efficiency with an internal fan that assists the heating process.

Consequently, the voltage power cord has a capacity of up to 120 volts with an efficiency between 95 to 115 degrees Fahrenheit. Thereby, it delivers up to 3.18 gallons that are enough for small to medium houses. Talking about the performance, it has a 3.6-145 PSI capacity that is enough for this unit and ensures effective thermal flow.

Finally, safety is the key priority of this Camplux 12L with the Child’s lock technology and protection-friendly temperature control. The automatic digital temperature control offers convenience for the user that assists in achieving safety. Also, the child lock feature has a temperature controlling capacity that reduces the temperature.


  • Sturdy construction quality.
  • Enhanced protection included.
  • LED display setting.
  • It comes with a power cord.


  • Lack proper ventilation.

In the end, the Camplux 12 L is for you if your main concerns lie with household security, effortless usage, energy insurance, cost reduction, and smooth water flow. It is one of the best propane tankless water heaters 2021 for small households considering its decent thermal efficiency and the protection system with automatic temperature reduction.

9. Rinnai RUR199iP – Best for Laundry

  • Weight: 84 pounds.
  • Flow Rate: 11 GPM.
  • Dimensions: 18.5 x 11.45 x 31.3 inches.
Rinnai RUR Series Tankless Hot Water Heater

The first and foremost significant feature of this Rinnai 199i is its condensation method and environmentally friendly mechanism. The double condensation method ensures the large value of heating and power distribution for smooth water flow. It further contains a low value of NOx operations that makes it ultimate for anyone looking for an eco-friendly option.

Likewise, talking about the usage and installation, it is an easy-going model. Thereby, it is straightforward to install and needs no previous experience. Coupled with this, the Control R 2.0 mobile app highlights this model that can monitor that water flow and adjust the temperature through your mobile phone. On the whole, it is decent for a household at a high altitude that needs convenience in the usage.

Additionally, the stainless steel construction quality is highly reliable, with an efficient ventilation system that ensures the unit’s durability. For further peace for users, it comes with a 2 years warranty. Another feature that makes it stand among the others is its temperature reset in any power outage. Thereby, it resets the temperature to make it energy efficient.


  • High thermal efficiency.
  • It comes with mobile app control.
  • Ideal for high altitudes.
  • Easy installation.


  • Limited water capacity.
  • Accessories not included.

In the end, this Rinnai RUR 199i is an ideal choice for you if you are searching for a decent, practical, and well-suited unit for medium households. It offers high energy efficiency and proper ventilation with absolute convenience. Its compact size and reliable buildup make it popular among the users and add value to the unit.

10. Rinnai RU160iP – Energy Efficient

  • Weight: 62 pounds.
  • Flow Rate: 9 GPM.
  • Dimensions: 18.5 x 11.45 x 31.3 inches.
Rinnai Indoor - High-Quality Propane Tankless Water Heater

The Rinnai RU 160iP is best known for its energy efficiency ensured with the energy factor of 0.92 and the energy plus condensation method. It further comes with easy to use a plug that can be used according to user preference and whenever you need hot water. It works on the Circ Logic technology that works on the schedule circulation method to assist energy efficiency.

Additionally, construction and safety are highly prioritized in this model. Thereby, it comes with the temperature lock and safe ignition method that ensures the voltage stabilization and temperature setting. Hence, protection is achieved. The indoor installation and usage is also convenient and offers effortless operations overall.

In the end, the stainless steel vents ensure efficient and proper ventilation with the ideal portability. With the compact size and the safety ensures, you can place it wherever you want, even in the basement, because of no risk of water leakage. On the whole, the non-stop water flow makes it stand among its competitors.


  • Energy efficient.
  • Easy installation.
  • High portability.
  • Enhanced construction quality.


  • Drainage might issue.

In essence, this Rinnai RU 160ip is a conventional yet effective unit with absolute energy efficiency, heating potential, and portability. The model is popular for its non-stop and smooth water flow with effective voltage stabilization. Thereby, the safety standards and construction quality add value to the product.


What is the best propane tankless water heater 2021?

Rinnai RL 94i is the best propane tankless water heater in 2021 with high-temperature control, energy efficiency, and absolute safety. Hence, it contains the Circ Logic mechanism with the 9.4 GPM rate ideal for any large place. Also, the anti-freezing method and the safety ignition method are brilliant in achieving protection.

What is the best propane tankless heater for thermal efficiency?

The Eccotemp Liquid propane FVI-12 is the best propane tankless water heater for thermal efficiency, with all the essential features present in the model. From thermal efficiency to power stabilization and safety, everything is ensured in the model. Between the 30-80 psi range, it can hold the temperature up to 120 degrees that ensures its efficiency.

What is the propane tankless water heater for easy use?

The Camplux 12 L is the propane water heater best known for its easy-to-use and convenient features. It comes with an LED display and automatic temperature control that helps the user achieve peace of mind. The display makes it effortless to control, adjust, and monitor the temperature coupled with the Child lock system that reduces toddlers’ and kids’ temperature.

Final Thoughts

Finally, all your worries about water heating will be eliminated with these best propane tankless water heaters. These are undoubtedly your companions in ensuring your household’s safety and energy efficiency and cost reduction that can help you cut the annual cost from your budget. Based on all the prerequisites, here are some suggestions;

In the end, enjoy your winters with these best propane tankless water heaters that can support your water heating by eliminating energy, time, and cost consumption.

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