6 Best Propane Tankless Water Heater of 2021

The best propane tankless water heater is just the same as the tankless water heater for natural gas, both of which are available in both propane and gas designs. It saves more energy and is more environmentally friendly than tankless electric styles. The propane-powered heater is a kind of propane-powered heating system, as the name implies. It is also classified as a tankless water heater with liquid propane and a tankless water heater with propane gas. Venting facilities are also needed, and you should make sure the machine is securely mounted.

Just look at the reviews we made for you if you have trouble selecting the right propane-powered water heater

Why Propane Tankless Water Heaters?

  • Instant hot water

One excellent propane heater efficiency is its continuous hot water. You don’t have to worry about running out of hot water in your bath. Within a few minutes or even a few seconds, it is capable of supplying continuous hot water.

  • Long Lifespan

The majority of high-quality water heaters last approximately twenty years, while the tank water heater does not last more than 15 years. It, therefore, saves a lot of money by mainly replacing it.

  • Less Pollution

Liquid propane is adopted for the propane tankless water system as the primary power source. It is one of the renewable fuels used to add fewer emissions to the atmosphere.

  • Compact Size

The water device is small, and thus, relative to a water heater, it occupies a smaller area.

  • Clean Water

Some water heaters may generate dirty water. The tank is often corroded and does not contain clean water, but you will still get clean hot water for a bath and hand washing with the propane tankless water heater.

List of Top Best Propane Tankless Water Heater

here we have provided you a complete Research based comparison Chart of our high demand top products that will make it easy for you to choose the best out of it according to your need.

Image Product Details   Price
rsz_1rsz_pr1 Rinnai V53DeP RV53DeP, 5.3 GPM, V53DeP-Propane/5.3 Flow Rate: 5.3 GPM

Suitable Place: Outdoor Installation Only

control overflow temperature
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rsz_1rsz_61xju96bvpl_ac_sl1500_ Rinnai Indoor Tankless Hot Water Heater / V65iP / Propane / 6.3 GPM, White Flow Rate: 6.5 GPM 

Suitable place: indoor installation

Good temperature control
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rsz_pr3 Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater Flow Rate: 2.7 GPM 

Suitable place: Indoor installation

Allows water temperature to be controlled
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rsz_pr4 Eccotemp FVI12-LP Liquid Propane Flow Rate: Greenworks
Suitable place: Can move freely while
Efficient power ventilation
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rsz_pr5 Camplux  Digital Display Propane Gas Tankless Water Heate Flow Rate: 4.22 GPM

Suitable place: outdoor installation only

Digital temperature display.
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rsz_6 Complex 2.64 GPM Tankless Propane Water Heater Flow Rate: 2.64 GPM

Suitable place: Indoor installation

Digital temperature control
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1. Rinnai V53DeP RV53DeP, 5.3 GPM, V53DeP-Propane/5.3

The V53DeP in Rinnai’s propane gas tankless water heater is the ideal combination of high performance, comfort, and value. Compact, easy-to-install, durable, and suitable for outdoor locations, ideal for small to medium-sized homes or remodels; Rinnai products offer peace of mind with promises that exceed the competition. For remote areas, V53 models are most suitable.

Rinnai V53DeP RV53DeP

Key Features:

  • Energy Factor of 0.82 / Uniform Energy Factor of 0.81
  • 15,500 BTU (Minimum) / 120,000 BTU (Maximum)
  • V53DeP HE High-Efficiency Tankless Hot Water Heater
  • Outdoor Installation Only
  • Up to 5.3 GPM hot water flow rate (varies by groundwater temp)
  • Control-R 2.0 mobile app features timers and schedules throughout the day and allows you to put the system into vacation mode remotely.

This water heater has an average efficiency of 0.82 once it’s running. This rating may seem low relative to other brands, but it still manages to be better than other gas water heaters.

This best propane gas tankless water heater provides a reliable source of hot water to multiple fixtures simultaneously in any size home. It only uses energy when hot water is needed. It is an excellent choice for smaller spaces. It fits in crawl spaces and attics without compromising output. It is effortless to install with PVC/CPVC in conjunction with the Ubbink Concentric to Twin Pipe adaptor (other venting options available). This unit has a lock function for temperature settings. It prevents unwanted changes to settings. Hence it is the best-rated propane tankless water heater and is one of amazon’s choice water heaters. 

  • Endless hot water for your entire home
  • Residential Factory Warranty – 120 months (heat exchanger), 12 months (labor), 60 months (parts)
  • Compact size
  • Scale control system
  • It comes with a remote to give you control overflow temperature
  • It uses more amps than are required for a typical 120 amp panel.

2. Rinnai Indoor Tankless Hot Water Heater / V65iP / Propane / 6.3 GPM, White

The V65iP Indoor tankless heater from Rinnai propane gas tankless water heater is the ideal combination of high performance, comfort, and value. This unit is perfect, lightweight, easy-to-install, reliable, and suitable for indoor locations for small to medium homes or remodels. With assurances that surpass the competition, Rinnai goods offer peace of mind.

Rinnai Indoor/V65iP/Propane

Key Features:

  • Up to 6.5 GPM hot water flow rate (varies by groundwater temp)
  • Control-R 2.0 mobile app features timers and schedules throughout the day
  • Remotely put the system into vacation mode.
  • Residential Factory Warranty – 120 months (heat exchanger), 12 months (labor), 60 months (parts)

The Rinnai V65I INTERIOR tankless water heater effectively provides hot water up to 6.6 gallons per minute (GPM), making it suitable for your home with one to two and a half bathrooms. Hence this ultra-compact, easy-to-install unit helps you to enjoy all the advantages of tankless Rinnai water heating. Moreover, you will experience clean, reliable hot water at a constant pre-set temperature while saving energy and precious floor space in your home. Hence this unit is the best propane tankless water heater.

Endless Hot Water

Put an end to scheduling your hot water need with the V65iP Rinnai water heater. Never again choose between taking a piping hot shower, doing a load of laundry, or running the dishwasher. Hot water will never run out of this Rinnai Tankless Water Heater and leave you in the cold.

Hot Water On-Demand

With ThermaCirc360 technology, Rinnai tankless water heaters recirculate hot water through your pipes to quickly carry your hot water. The equivalent of twenty-four 16-ounce bottles of water can be lost any time you wait for hot water to run from your old tank to your tub.

Save Valuable Space

There’s no need for your water heater to be a behemoth!In non-traditional spaces such as the attic, crawl space, or even a closet, the lightweight design allows for installation. Moreover, this unit from Rinnai tankless water heater is only the size of a small suitcase and even saves up to 16 sq. foot of space 

Affordable, Efficient Savings

Packaged in a compact design, performance reduces CO2 emissions (compared to tanks), using less energy and conserving water. This heater uses 40 percent less energy than standard tanks because it heats the water only whenever you need the hot water.

  • Endless hot water for your entire home
  • V65iP HE High-Efficiency Tankless Hot Water Heater
  • Good temperature control
  • Propane: Indoor Installation Only

3. Marey GA10LP Power 10L 3.1 GPM Propane Gas Tankless Water Heater, Liquid, White

This lightweight model saves space and only allows for simple installation anywhere. As needed, it heats an infinite amount of water and enables you to monitor the flow of water and gas flow to a better temperature. So, if you want hot water instantly and on-demand, this is the product for you. The Tankless Water Heater MAREY GA10LP Indoor Propane Gas can provide up to 2.7 Gal. On-demand is also called a water heater since it only heats water when needed, saving energy.

Marey GA10LP Power

Key Features:

  • Adjustable gas and water control knobs
  • Digital panel shows out coming water temperature.
  • Electric pulse ignition (2 D-cell batteries required; not included)
  • Activates by water flow when the faucet is turned on
  • Rust-proof
  • Anti-combustion and gas pressure safety protection
  • Works quickly with low levels of water pressure
  • Applicable water pressure: 3.6 – 145.0 PSI

Since this heater does not need electricity, it is also an excellent solution for those homes that experience regular power outages. The 10L unit offers up to 3.1 gallons per minute to provide your home family with hot water at various use points. Nevertheless, it is the best whole house propane tankless water heater.

It is manufactured in the USA and is suitable for providing endless hot water for up to 2 or 3 consumption points simultaneously (for a variety of residential hot-water applications). Its compact nature saves space and makes installation simple. For ignition and ventilation, you will only need a 2-D cell battery (not included in the box).

Easy to install!

This is the water heater for you if you want to mount it yourself. A user manual with installation orientations comes with it. A 5-year guarantee also comes with it.


Not only does Marey have inexpensive and efficient heating solutions, but it also produces items for easily portable customers. They can be quickly held and pushed about because they’re lightweight.

  • Compact design saves space and is easy to install almost anywhere.
  • Saves up to 60% on electricity bills for water heating.
  • Provide endless hot water on request and only when necessary.
  • 2 D-cell batteries are needed for the igniter, so the system does not require electricity to function.
  • Allows water temperature to be controlled
  • It does not work well on high altitudes
  • Removing the batteries is quite challenging.

4. Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White

The extremely powerful Tankless Water Heater Eccotemp FVI12-LP uses an intense propane flame to heat water instantly when it passes through the heater exchanger. So as long as you feed in the water, hot water is going to come out! With the Horizontal Vent Package included, this Eccotemp FVI12-LP Tankless Water Heater is ready to be mounted right out of the box for indoor use.

Eccotemp FVI12-LP Liquid Propane

Key Features:

  • This unit activates only when in use, making it an energy saver.
  • Safe electronic ignition system
  • plugs into standard 120v electrical outlet with UL-listed cord.
  • Uses standard 1/2″ NPT water fittings 
  • Manual water temperature controls
  • Minimum 0.65 GPM flow rate
  • Frustration-Free Packaging
  • Digital thermostat and temperature display
  • Manual water-temperature controls
  • Stainless steel horizontal vent kit included
  • Uses gas only when hot water is activated
  • 30-80 psi water pressure

Hence this water heater is great for cabins and smaller homes. It can be used with a propane tank of 20 to 100-pounds (lb) (tank and hoses not included). A manual heater for water is the EccotempFVI12-LP Tankless Water Heater. This implies that any changes to the water temperature must be made on the face of the device using the water flow and gas pressure knobs. It is not recommended to mix the cold water at your production source.

  • Efficient power ventilation
  • Perfect for any small home
  • Easy to read digital temperature display
  • Minimal noise output.
  • Compact Size
  • ISome users experienced inconsistent performance

5. Campus 16L Outdoor 4.22 GPM Digital Display Propane Gas Tankless Water Heater

For campsites, cabins, or simply around the home, the 4.22 GPM Camplux portable tankless water heater is sufficient. Wash the car, wash the boat, take a hot shower, wash the horse or the dog. The Camplux water heater focuses on revolutionary combustion technology and advanced multiple protection systems to ensure your safety.

Campus 16L Outdoor 4.22 GPM

Key Features:

  • The Camplux BW422 is ideal for camping, to the beach or family vacations, mountain cabins, horse stables, etc.
  • 4.22 gallons hot water output per minute
  • Digital temperature display.
  • Flame failure device
  • Anti-freezing protection
  • Overheating protection to ensure the safety
  • The simple design and high output structure with 88.5% thermal efficiency
  • Maximum power output at 110,000btu/hour
  • CSA certified gas regulator and quality rubber plastic water hose included.

The ignition has 2 D cell batteries, making it ideal for off-grid or other places where there is no readily available electricity. For the 4.22 GPM Camplux portable tankless water heater, the optimal operating range is 4.0 ~110.0 PSI.

 Easy to Use  

  • Install the gas water heater on the wall. 
  • Connect the gas cylinder with the supplied gas hose and regulator. 
  • Connect shower hose and showerhead to the water outlet. 
  • Connect the water hose to the water inlet. 
  • Insert 2 “D” cell batteries. 
  • Enjoy instant hot water! 

Plus Features

  • It can also be mounted indoors where it is well ventilated if a flue pipe is installed additionally. (the flue pipe not included)
  • Turn the ignition on with 2 “D” cell batteries whenever electricity is not needed!
  • Applicable water pressure from 4.0~110.0 PSI.Hot water output 4.22 gallons per minute, work efficiently with excellent performance.
  • The operating propane gas pressure is 0.4PSI with a maximum power output of 11,0000 BTU/hour.
  • The gas water heater can’t be used for drinking water.
  • The camplux tankless propane water heater line was not recommended for elevation above 2000 ft.
  • You can get instant, endless hot water quickly wherever you are.
  • Save Money-High thermal efficiency at 88.5%.
  • Save Space-Traditional tank heaters take up a lot of space.
  • The gas regulator and gas inlet brass fittings are connected by a torque wrench with a torque force of 20-28 Nm.
  • Some users experienced inconsistent performance

6. Complex 2.64 GPM Tankless Propane Water Heater

For campsites, cabins, or entirely around the home, the 2.64 GPM Camplux portable tankless water heater is sufficient. Wash the car, wash the boat, take a hot shower, wash the horse or the dog. There are 2 D cell batteries in the ignition, so it makes it perfect for the off-grid. 2.8 110.0 PSI is the optimal operating range for the 2.64 GPM Camplux portable tankless water heater.

In order to ensure your safety, the Camplux water heater focuses on revolutionary combustion technology and advanced multiple protection systems.

Complex 2.64 GPM Tankless

Key Features:

  • Ignition is provided by 2 D cell batteries, which means electricity isn’t required to power the unit. (Batteries not included)
  • It comes with CSA approved gas regulator and required adapters.
  • Dry combustion protection, flame failure device, anti-freezing protection.
  • The compact size and high output are only thanks to energy-saving technology.
  • Flame failure device, anti-freezing protection, and overheating protection to ensure safety.
  • It comes with a gas regulator and required installation hardware packs.

The Camplux BW264 is suitable for hiking, mountain cabins, horse stables, etc., for beach or family vacations. If a flue pipe is still built indoors, it can also be placed where it is well ventilated. The machine also fits well with a 12-volt water pump for updated water systems. With a maximum power output of 68,000btu/hour, the operating propane gas pressure is 0.4PSI.

Easy to Use:

This unit provides indoor usage for entire homes on-demand with clean, adequate power ventilation, suitable for any small homes, cabins, or apartments.

Modern Design:

It is easier to read the temperature with the unique color optical temperature monitor. This unit has compact and space-saving design characteristics with low noise output.

Save more energy:

Eco and Full gas switch, rated at 2.64 GPM, which only activates while in operation, thus saving more electricity.

 More Safety:

Flame-out protection, anti-freezing protection (manual drainage required), and protection against overheating, protection against air flow pressure switches to ensure safety. Safe electronic ignition system, with UL-listed cord connectors to the regular 120V electrical outlet.

Control Water Temperature Easily:

It uses regular 1/2″ NPT water fittings and is fitted with manual water temperature controls that are simple to use.

Plus Features

  • The operating propane gas pressure is 0.4PSI with a maximum power output of 68,000btu/hour.
  • Applicable water pressure from 3.6~110.0 PSI. Hot water output 2.64 gallons per minute, work easily with excellent performance.
  • The system also works with a 12-volt pump to get the desired pressure.
  • The 120-volt power cord powers the internal exhaust fan and color screen, safe electronic ignition system.
  • The operating propane gas pressure is 0.4 PSI with a maximum power output of 68,000btu/hour.
  • Ideal for camping, to the beach or family vacations, mountain cabins, horse stables, etc.
  • High thermal efficiency at 88.5%.
  • Save Space-Traditional tank heaters take up a lot of space.
  • Digital temperature control
  • Portable tankless water heater
  • Reasonable price
  • Best propane tankless water heater
  • More secure
  • It may result in a gas leak or even on fire if you forget to put the gasket into the adapter before connecting the regulator to the heater.

Best Tankless propane water heater Buying guidelines , You must Know

In purchasing an on-demand water heater, there is no room for error. When buying a propane tankless water heater, you should remember the following.


In urban areas, you need to know and measure the average temperature and judge the maximum temperature that you need. Most propane heaters reach up to 140 degrees F, but in cold areas, it can drop a little.


The firms suggest that the installation should be performed by a licensed contractor. The contractor should consider the tankless heater’s plumbing, electrical, gas, and venting aspects. What this means is the added expense of employing a contractor. If you do the installation yourself, in the event of something, you may void the guarantee.


You can mount it on any wall in your home if you are using an indoor propane water heater. To save energy, you can also install a heater on the outer wall of your house.

For an outdoor water heater, for quick setup and installation, you can get one with mounts and handles.


Indoor models of propane water heaters will vent through the roof vertically or through the wall horizontally. Best protection and efficiency should be provided by the venting option.


The most crucial issue is the safety of the tankless propane water heater. Many water heaters, such as self-diagnosed devices and freeze protection, are equipped with self-protection schemes. In dangerous circumstances, these devices are able to secure the computer and automatically stop it.

Gas Supply

Gas tankless water heaters are more powerful than electric ones. To power the device up, your gas supply should be big enough. Also, you should think about the location of the latest tankless unit meter. To help you consider all your choices, you can obtain the services of a gas supplier or a plumber. Make sure electronic ignition is used in the gas power model that you are looking for.

Energy-saving and efficiency

One of the reasons for the use of an on-demand tankless propane water heater is energy saving. When choosing one that will fulfill your needs, you should be eager. Note, as the water requirements increase, the performance and power saving of the heater decreases.

Read more about Top best tankless water heaters

Frequently Asked Questions About Best Propane Tankless Water Heater

  1. How do costs for tankless gas water heaters compare to prices for electric water heaters?

Electrical water heaters are more comfortable to build and buy, but the operation and maintenance of gas water heaters is more economical. The same amount of energy can be used by electric versions as all of your other home appliances combined. In comparison, to provide your entire home with hot water, gas models require considerably less power.

2. How long-lasting are tankless gas water heaters?

The best tankless water heater models with propane have a long lifespan. Factors like the thermostat, use, brand and model, and installation can depend on the reliability of your own heater. It’s fair to say you should expect a tankless water heater with natural gas or LP to last at least 15 to 20 years. Some last up to 25 years, too. With regular maintenance, you can extend the life of your water heater.

3. Do I need to wait until I get hot water for the water heater to ‘heat up’?

If you don’t have a recirculation system, the water coming out of the tap won’t be hot right away, so you’ll just have to wait a few seconds. Basically, your water heater receives a signal to start heating water when you turn on a warm water faucet. You need to flush out the cold water which is still in the pipes before you obtain this hot water.

4. Do propane tankless water heaters need to be vented?

Propane tankless systems don’t need to be vented through the roof, unlike conventional storage-tank water heaters. Horizontally, their combustion fan blasts exhaust from the units.

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