Best Propane Tankless Water Heater

If you want to enjoy hot water on demand, a tankless water heater is a great choice. Propane is a great choice if you’re interested in fuel efficiency.

Propane water heaters have high initial costs because not only they are more expensive than electric ones, they also take longer to mount and install.

Are you looking for the best propane tankless water heater? Don’t look anymore as we are going to help you.

Here is the list of best tankless water heater propane:

1- Rinnai RUC98iP Propane Tankless Water Heater

Rinnai is a well-known tankless water heater. It delivering both propane and natural gas products. RUC98iP is the best overall tankless water heater, in our opinion, because not only it’s suitable for large homes, households, and workplaces, but there are outstanding features that make it safe, reliable, and high-performing. Rinnai’s products are more reliable for homes with a lot of bathrooms and more simultaneous performance.

This is one of the most energy-friendly options, rated with 96% Energy Factor, with its ultra-low NOx emissions. RUC98iP supports up to 199,000 max BTU for the household, while its maximum water flow can reach 9.8 GPM. That makes it ideal for both warmer and colder areas.

It is suitable to install anywhere. The drawback is that this model is more expensive than the others. This unit provides a 96-degree energy factor that makes it the best propane tankless water heater. This feature also enables the tank to be more energy-efficient.


  • Can be installed anywhere.
  • Supplies 9.8 gallons of water each minute.
  • Has a space-saving design for more convenience.
  • Comes with an ultra-low emission NOx.


  • Expensive and hard to install.

2- Eccotemp L10 Propane Tankless Water Heater

Eccotemp L10 is a great and environmentally friendly propane water heater. It is affordable and accessible easily. It is assembled with extreme ease, and its portability allows clean installation in parks, outdoor areas, and small apartments and houses with not more than one bathroom. It provides 74,500 BTU’s capacity with stainless rain cap design.

Its cutting-edge performance also earned it a 9’ CSA-approved gas regulator, as well as half an inch NPT, which you can use to monitor the hose adapter and protect it.

It is also equipped with various safety-related features like an automatic safety shutdown timer. It resets every 20 minutes after the water stops. After the reset, it starts working again. The company also promises that instant hot water delivery works great. This Product comes with 2.6 GPM maximum water flow.

 It will be slightly difficult to use in the northern areas where temperatures are lower. It also comes with a nine-foot gas regulator and hoses to fit a standard twenty-pound grill-style propane tank.


  • Easy to install, portable, safety shutdown timer.
  • Capable of running effectively at altitude.
  • Impressive output for a portable unit.


  • The battery box will let in moisture unless you seal it with duct tape.

3- Takagi T-KJr2-IN-LP Propane Tankless Water Heater

Takagi’s propane heaters have no exception, especially because it is very fast at its performance. It is the very smallest unit. Another great thing about it is that it requires minimal maintenance if checked regularly. It boasts a power input of up to 140000 BTUs per hour, which makes it more practical among the competition and provides high-end performance. It can convert into a direct vent unit.

The flow rate rating is also very reasonable and enables constant hot water flow at different temperatures and climates. The best part about it is that it can deliver temperatures above 150F while providing 6.6 gallons every minute.

The unit is also equipped with a remote controller, which can be used to set the temperature increment. It is good for both larger and smaller places, and it’s compact and well-designed. So propane squeezes more performance and is more environmentally friendly, you don’t have to worry about the space either.


  • Outstanding performance in both warm and cold climates.
  • Energy-friendly doesn’t occupy a lot of space.
  • Air Fuel Ratio (AFR) sensor.
  • Exhaust & Water Temperature Safety control.


  • Good only for small homes, installation requires some additional parts.

4- Rheem RTG-64XLP Propane Tankless Water Heater

The RTG-64XLP is an ultra-low NOx, mid-efficiency propane instant water heater. It is designed for continuous hot water in 1-2 bathroom homes and is now compatible with residential hot water recirculation pumps. Raheem RTG-64XLP 82% energy efficient with all copper heat exchangers. It is equipped with a modern and intelligent design while providing input of 150,000 BTUs.

This product is reliable, and it’s equipped with a series of safety-reliable features which make it an extremely powerful device. There are high water flow rates, with 6.6 gallons of hot water per minute. This model can provide are up to 180F, with high-end performance, which delivers hot water in minutes.

 It has low NOx emissions, which makes it one of the most popular environment-friendly options. The installation process may be a bit difficult. In addition to the less compact component, the manufacturer advises consumers to install the device outside.


  • Self-diagnostic system for easy installation and service.
  • Built-in electric blower.
  • High-performance, environment-friendly.
  • High input power, high temperatures.


  • Requires installation outdoors, difficult to assemble, requires additional expenses.

5- Eccotemp i12-LP Propane Tankless Water Heater

If a style is one of your criteria for your water heater, check out the i12-LP from Eccotemp. The front panel is made of sleek black tempered glass, with an LED display for flow rate and output temperature. It is designed for indoor installation and will look the business in any modern interior. It’s designed for small and medium-demand applications. It will work well in smaller homes or for occasional use in holiday cottages or cabins.

There are fully automatic temperature controls. It has also a touch screen display, so you can adjust using the screen. The hot water ranges from 0.6 to 4.8 gallons per minute. The minimum gas rate is 25,000 to 80,000 BTUs. It comes with a complete horizontal stainless steel venting kit. And the 110-volt power cord for the internal exhaust fan and digital display is included too.

If you live in an area that experiences very cold weather, you may struggle to cope. But if you have a smaller home and a less demanding climate, this is a great-looking and effective heater.


  • Classy tempered glass finish.
  • Automatic temperature controls and touch screen.
  • Child lock prevents little fingers from interfering with the controls.


  • Not the best choice for colder climates.


So above we discuss some of the most accommodating and best propane tankless water heaters. These heaters were evaluated on the basis of their user-friendliness, types, and pace as well. This is to maintain a holistic overview of which best propane heaters to pick.


Q: Are propane tankless water heaters worth it?

Ans: While these systems are more expensive, they are also more efficient. In fact, Consumer Reports indicates that tankless water heaters are 22% more efficient than standard models. The monthly savings might be nominal, but homeowners can expect to save hundreds of dollars annually.

Q: How big of a propane tank do we need for a tankless water heater?

Ans: For a family of 2, 15 gallons will do just fine. A family of 3 or 4 needs 25 gallons of propane monthly. A family of more than 5 members should need 35-40 gallons of propane to do all their household chores.

Q: Is Propane Cheaper Than Electric?

Ans: The simple answer to this would be yes, propane is definitely cheaper than electric. According to the Department of Energy in the US, heating your home via propane gas costs much less than heating it via an electric heater. Moreover, propane heaters are also cost-effective because the money to buy them is also not much.

Q: Will You Install It Yourself?

Ans: You can install it yourself if you are 100 % sure of what you are doing, remember that you can cause damage to your water heater if you are not very sure of how to do it. The best thing is you need to contact a professional to help you in doing the job because he or she is perfect in that job.

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