A tankless water heater is a great solution to meet hot water supply on-demand and in the fastest time. It is a great way to save money, utilize less energy, and maintain environment-friendliness to a high extent. 

With numerous technologies and various engineering methods available, there is an extensive assortment of propane tankless water heaters available. These models differ in various aspects, and hence, picking the best variant becomes complicated.

To make things simpler for you, we have sampled numerous propane tankless water heaters and have shortlisted the best ones. We have checked and reviewed these heaters on various aspects including durability, features, cost, efficiency, performance, ease of installation, and more others.

Here is a list of our ten best tankless water heaters along with a buying guide to pick the best one for your home.

10 Best Tankless Water Heaters

  1. Takagi T-K-Jr2-IN-LP Indoor
  2. Rinnai RL94iP HE+ Tankless Hot Water Heater
  3. Rheem RTGH – 95XLP Prestige Propane Outdoor Whole House
  4. Camplux 5L 1.32 GPM Outdoor Portable
  5. Eccotemp Fv112-LP Liquid Propane
  7. Rinnai RUC98iP Ultra Series
  8. Rheem RTG-64XLP 6.4 GPM Low NOx
  9. Eccotemp L10 2.6 GPM water heater
  10. Tengchang 10L 2.6 GPM LPG Gas Propane

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

1. Takagi T-K-Jr2-IN-LP Indoor Tankless Water Heater 


  • BTU – 19,500 – 140,000
  • Type – direct vent
  • Weight – 38 pounds
  • Dimensions – 6.7 x 13.8 x 20.3 inches
  • Voltage – AC 120V
  • Flow – 6.6 GPM max

Additional Features: ¾ inches bottom water connection, freeze protection, surge protection, and other safety features, 6.6 GPM max flow rate, regular temperature monitoring, 0.81-0.83 energy factor

Ideal for indoor use and engineered using the latest technology, the Takagi T-K-Jr2 is one of the hot-selling propane tankless water heaters. Delivering a minimum BTU of 19,500 and a maximum BTU of 140,000, it comes with direct vent type. With a bottom water connection of ¾ inches and voltage consumption of AC 120V, it ensures you always have a hot water supply.

This tankless heater is integrated with an outlet and inlet thermistors allowing constant temperature monitoring. The 4-inches category III stainless steel venting delivers long-lasting performance without resulting in issues. The best thing about this heater is its safety features such as overheat protection, freeze protection, troubleshooting diagnostic codes, and surge protection.

It is the smallest unit in the Takagi range and is ideal for light residential like small apartments and radiant heating applications. It comes with the energy Star rating. Hence, you no more have to worry about high utility bills.

What We Like

  • Lightweight and compact
  • Water connection at the bottom
  • Energy star certification
  • Requires less voltage consumption
  • Low NOx
  • Integrated with multiple safety features
  • Thermistors regularly monitor the temperature

What We Don’t

  • It will not serve big residents or larger applications.
  • Requires stainless steel venting
Takagi T-KJr2-IN-LP Indoor Tankless Water Heater
218 Reviews
Takagi T-KJr2-IN-LP Indoor Tankless Water Heater
  • Maximum BTUs: 140,000 ; Minimum BTUs: 19,500
  • Vent Type: Direct Vent ; Water Connection Location: Bottom ; Water...
  • Heat Exchanger: Copper; Voltage: AC 120V ; UEF: 0.80 ;Emissions: Low Nox
  • Product Weight:38 lbs; Safety features include freeze, overheat, surge...

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

2. Rinnai RL94iP HE+ Tankless Hot Water Heater, Propane / 9.4 GPM, Indoor Installation

  [maxbutton id=”2″ url=”https://amzn.to/32i9A8w”]


  • Type – interior mount vent
  • Weight – 44.3 pounds
  • Dimensions – 14 x 10 x 23 inches
  • Voltage – 115 volts
  • Flow – 9.4 GPM

Additional Features: Circ-logic technology recirculates water, residential factory warranty of 120 months, Wi-Fi monitoring, compact, interior-mount unit vent

This is a high-efficiency plus RL model from Rinnai based on the most advanced technology in non-condensing tankless water heaters. It supplies endless units of hot water and at the same time saves energy. The Wi-Fi monitoring feature coupled with recirculation technology ensures faster delivery of hot water and a perfect solution for modern users.

This propane tankless water heater lets you enjoy consistent hot water for up to five appliance and plumbing outlets at the same time. You can pre-set the preferred temperature and enjoy a consistent supply.

With a sound capacity of up to 9.4 gallons per GPM, it maintains up to 40% energy efficiency. The interior mount and compact design maintain space savings and vents directly to the outside with a concentric venting system.

It is high-efficiency packed in a compact design with low CO2 emissions. The innovation and unsurpassed quality render complete peace of mind. While the ThermaCirc360 technology circulates hot water through pipes without leading to wastage, the compact design allows convenient installation in spaces like the closet, attic, and crawl space.

What We Like

  • Endless hot water supply
  • Maintains high efficiency without water wastage
  • Compact design allows easy installation in attic, closet
  • Affordable and energy-efficiency
  • Designed using high-grade components
  • Sustainable reliability
  • A great solution for indoor use

What We Don’t

  • It maintains up to 40% efficiency.
  • Does not include advanced safety features.
Rinnai RL94iP Propane Gas Tankless Hot Water Heater, 9.8 GPM
800 Reviews
Rinnai RL94iP Propane Gas Tankless Hot Water Heater, 9.8 GPM
  • Energy and Space Efficient: Space-saving design conserves energy as it...
  • Optimal Water Pressure: High-performance 9.8 GPM hot water flow rate for a...
  • Instant Heating: Circ-Logic technology enables recirculation patterns that...
  • Guaranteed to Last: 12-, 5-, and 1-year residential and 5-, 5-, and 1-year...

Last update on 2022-01-25 / Affiliate links / Images from Amazon Product Advertising API

3. Rheem RTGH – 95XLP Prestige Whole House 9.5 GPM Water Heater 


  • Type – 2-pipe direct vent system
  • Weight – 88 pounds
  • Dimensions – 18.5 x 9.8 x 27.5 inches
  • Voltage – 120 Volts
  • Flow – .26GPM minimum flow rate and .40 GPM minimum activation flow rate

Additional Features: digital display, self-diagnostic system, intelligent electronic controls, Guardian OFW overheat film wrap, built-in electric blower, Low Nox

Rheem is renowned for total heating and cooling water solutions. This propane tankless water heater from Rheem is a great solution equipped with numerous accessories and serves as a one-stop solution for most of your hot water requirements. It comes with EZ-link cable ideally serving high demand applications connecting two tankless units to function as one.

It manifolds up to 6 units with the option of MIC-6 manifold control board. It requires no chip for the high-altitude capability of up to 8.840 ft elevation above sea level. The presence of Guardian OFW overheat film wrap and third-party efficiency certification ensures you gain consistent hot water supply.

It is compact with intelligent electronic controls increasing safety and energy efficiency and space-saving design.

With the self-diagnostic system, a digital display showing temperature settings, built-in electric blower, and requiring a voltage of just 120 volts, it emits Low Nox and hence is perfect for your home.

What We Like

  • Suitable for high demand applications
  • EZ-link cable connects two tankless units as one
  • Maifolds up to 20 units
  • Energy saving and compact
  • Space saving design
  • Integrated with multiple advanced features
  • Increase energy efficiency and safety
  • Monitors temperature settings and maintenance codes
  • Environment-friendly construction
  • Low NOx
  • Energy Star rating

What We Don’t

  • An expensive solution for light applications
  • Slightly hefty
Rheem RTGH-95XLN Prestige Natural Gas Outdoor Whole House Low NOx Condensing Tankless 9.5 GPM Water...
17 Reviews
Rheem RTGH-95XLN Prestige Natural Gas Outdoor Whole House Low NOx Condensing Tankless 9.5 GPM Water...
  • .94 Energy Factor (EF) with efficient stainless steel condensing heat...
  • 2-Pipe Direct Vent System designed for PVC Pipe
  • up to 35-Feet. of 3-Feet PVC Pipe or 5-Feet of 2-Feet PVC Pipe
  • Industry Best .26 GPM Minimum Flow Rate, .40 GPM Minimum Activation Flow...

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

4. Camplux 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater 


  • BTU – 28,000 BTU/hour
  • Type – outdoor and indoor direct vent
  • Dimensions – 11.42 x 4.33 x 14.8 inches
  • Voltage – 3 volts
  • Flow – 1.32 GPM

Additional Features: CSA certified portable tankless heater, compact size with folding handle, anti-freezing and overheat protection, oxygen depletion safety shut-off, flame-failure device, energy-saving technology, instant hot water supply

The Camplux water heater is a wonderful outdoor solution. It comes with oxygen Depletion Sensor protection and can be installed well-ventilated indoors as well. It comes with 2 D cell batteries, which can be used to turn on the ignition when there is no electricity supply.

It comes with ideal low water pressure operating range and hence works great even when there is less supply of water within the pipes. This system also performs great on the modified water system with its 12-volt water pump. It operates at a gas pressure of 0.4PSI with a maximum power output of 28,000 BTU/hour.

It’s a compact size with portable handle enabling convenient setup for outdoors. Delivering 1.32 gallons per minute of hot water supply and maximum temperature bearing capacity of 114.8 Degree Fahrenheit makes it a great product. 

What We Like

  • Ideal for campsites, cabins, and houses
  • Meant for both indoor and outdoor use
  • 2D cell batteries ignition maintains supply without electricity
  • Works great on modified water systems
  • Overheat protection
  • Anti-freezing protection
  • Lowest water pressure startup
  • Works well with Camplux 12V water pump
  • CSA approved

What We Don’t

  • It is not suggested for use at an elevation above 2000ft. 
CAMPLUX ENJOY OUTDOOR LIFE 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White,...
1,230 Reviews
CAMPLUX ENJOY OUTDOOR LIFE 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, White,...
  • CSA approved portable tankless water heater for US &Canada markets. Lowest...
  • The maximum temperature raise is 114.8℉(46℃) and the minimum...
  • Its compact size with folding handle keeps it out of the way, allowing for...
  • Flame failure device, anti-freezing protection and oxygen depletion safety...

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

5. Eccotemp Fv112-LP Liquid Propane Gas Tankless Water Heater


  • BTU – 80,000
  • Type – venting needed
  • Weight – 33 pounds
  • Dimensions – 24.75 x 15.25 x 6 inches
  • Voltage – 110 volts
  • Flow – 4.0 GPM

Additional Features: High-energy saving, efficient power ventilation, digital temperature display, minimal noise output, safe electronic ignition, uses 1/2inches NPT water fittings

The Eccotemp FV112-LP is a highly efficient propane tankless water heater that uses an intense propane flame to immediately heat the water as soon as it passes through the heat exchanger. It supplies hot water endlessly, offering you complete comfort.

Equipped with Horizontal Vent Kit, it is ready to install for indoor use. It precisely serves smaller homes and cabins, while maintaining your budget. It can be used with a 20 to 100 pounds propane tank. It is a manual water heater meaning that you have to make water temperature adjustments using the knobs for gas pressure and water flow. 

However, there is a digital display available that lets you read the temperature easily. The space-saving and compact design with minimal noise generation along with efficient power ventilation and safe electronic ignition system make it an ideal home solution. 

What We Like

  • Comes with easy to use manual water temperature controls
  • 120-Volt electrical outlet
  • Compact and space-saving design
  • Efficient performance and power utilization
  • Activates only when in use
  • Comes in ready to install and use form
  • Includes Horizontal vent kit
  • Instantly heats water

What We Don’t

  • Comes with manual temperature controls and not digital ones
  • Meant for indoor use only
Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White
467 Reviews
Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White
  • Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM...
  • For indoor installation with safe, efficient power ventilation and perfect...
  • Easy to read digital temperature display, on a compact and space-saving...
  • Safe electronic ignition system; plugs into standard 120v electrical outlet...

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

6. TAKAGI TH30SLP Tankless Water Heater



  • Type – direct or indirect vent
  • Weight – 59 pounds 
  • Dimensions – 21.8 x 15.6 x 33.2 inches

Additional Features: outlet and inlet thermistors, constant monitoring of temperature, ideal for radiant heating and light residential applications, 

This propane tankless water heater from Takagi is a compact design having no tank and the potential to heat up to 10 gallons water per minute. It is a high selling product as it comes with computerized safety features, which means there is no pilot light needed to keep a check on.

The simple design makes it easy to install and use. You only have to install it and it will keep running and working in just a few minutes. With a weight of only 59 pounds, it still, delivers exceptional performance and long-lasting service life. It can easily heat water between 100 -185 Degree Celsius ensuring you always get the desired temperature range.

Along with simple features, one thing that makes this heater a great product is its low price. Available at affordable norms it does not compromise on quality and instantly heats hot water thereby saving water wastage and electricity. 

What We Like

  • Can be used with storage tanks
  • Comes with recirculation systems
  • Ideal for hydronic heating systems and radiant floor systems
  • Compact and space-saving design
  • Easy to install and use
  • Highly affordable

What We Don’t

  • It does not come with any advanced features
  • Can meet only basic hot water requirements

7. Rinnai RUC98iP Ultra Series Propane Tankless Water Heater, Concentric/Twine Pipe Installation 


  • BTU – 199000
  • Type – PVC or concentric venting option
  • Weight – 82 pounds
  • Dimensions – 10 x 18.5 x 26 inches
  • Voltage – 120 volts
  • Flow – 9.8 GPM

Additional Features

The Rinnai RUC98iP tankless water heater comes with adjustable power input and holds a BTU range of up to 199,000 BTU ensuring you get a consistent hot water supply at your preferred temperature and flow rate. With the capacity to provide 9.8 gallons of hot water per minute, it is a convenient source for every home.

The high energy efficiency of 96% coupled with easy installation and maintenance lets you save a lot on your monthly bills. It is a great pick for those who really care about the environment as it comes with ultra-low Nox emissions. 

It is very easy to install this water heater and you don’t have to worry about spending money on professional installation. It lets you enjoy a great warranty plan. The lightweight and compact design offer easy installation. 

What We Like

  • No fabrics
  • Up to 96% energy efficiency
  • Compact and space-saving design
  • Easy to use and install
  • Ultra-low Nox
  • Energy Star certification
  • ¾ inches MNPT gas connection types
  • Comes with a remote

What We Don’t

  • It will not serve big residents or larger applications.
  • Requires stainless steel venting
Rinnai RUC98iP Ultra Series Propane Tankless Water Heater, Concentric/Twin Pipe Installation
29 Reviews
Rinnai RUC98iP Ultra Series Propane Tankless Water Heater, Concentric/Twin Pipe Installation
  • Concentric or PVC venting option
  • Up to .96 Energy Factor
  • The space-saving design allows installation almost anywhere
  • Ultra low NOx emissions

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

8. Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater 


  • Weight – 53.3 pounds
  • Dimensions – 14 x 10 x 26 inches
  • Voltage – 120 volts
  • Flow – .26 GPM minimum and .40 GPM maximum

Additional Features: outdoor installation, 6.4 gallons/minute at 35 Degrees, 5.6 gallons at 45 Degrees, low NOx emission, remote control, thermostat wire, UMC-117 remote control

This propane tankless water heater by Rheem is a great solution to heat water at home. It ensures you never run out of the water and is equipped with innovative and high-performing technology.

This is an energy-efficiency and space-saving design that offers 6.8 gallons of water in one minute at an outdoor temperature of 35 Degrees. It is meant for outdoor installation only and offers industry-best .26 GPM minimum flow rate.

The presence of UMC-117 remote control and 10-ft thermostat wire ensures you have no trouble while installation and use. The EZ-link cable perfectly meets high demand applications and connects 2 tankless units to function as one. It can manifold up to 6 units with the optional MIC-6 manifold.

What We Like

  • Delivers great performance
  • Compact and lightweight design saves space
  • Easy installation
  • Comes with remote control operation

What We Don’t

  • It can be installed outdoors only as fumes released can pose health hazards.
  • Requires additional installation tools like ground lines, vents, and valves.
Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater
67 Reviews
Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater
  • Propane Tankless Water Heater
  • Outdoor
  • 6.4 gal/min. at 35 Degree Rise
  • UMC-117 remote control and 10-Feet of thermostat wire is included

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

9. Eccotemp L10 2.6 GPM Portable Tankless Water Heater, 1 Pack, White 


  • BTU – 74,500 BTU
  • Type – propane tank type
  • Weight – 27 pounds
  • Dimensions – 5.37 x 1.97 x 88.78 inches
  • Voltage – 3 volts
  • Flow – 3 GPM

Additional Features: upgraded chrome shower head, stainless steel hose, operating range of 20-80psi, 45-degree safety tilt switch, 20-min safety shut-off timer, comes with hose and gas regulator, quick connect

Whether you are spending a relaxing day at the lake or camping outdoors, if you need a hot shower, this propane tankless water heater will let you have convenient access.

This water heater is perfect for cabins, campsites, or in the house. It can heat temperatures between 50 to 140 Degrees Fahrenheit and comes with electronic ignition powered by 2 D cell batteries. Hence, even if there is no electricity supply, you can still have convenient access to hot water.

It is compatible with 12-volt pumps and works great with EccoFlo Strainer and Pump. The heater is very easy to install and hangs L10 using the mounting bracket on the back or top of the unit. You can connect it to the gas cylinder with provided gas hose and regulator.

It comes with a stainless steel hose and a standard 20-pound grill style tank. It generates output to 74,000 BTU and supplies hot water even at an altitude above 5,500 ft. It comes with automatic cut off after 20 minutes and then starts again if the switch is still on 

What We Like

  • It runs efficiently at a high altitude.
  • It delivers an impressive output.
  • Comes with a high-quality showerhead
  • Integrated with a hose and gas regulator
  • Great for outdoor sites and camping
  • Easy to maintain temperature controls
  • Lightweight and compact
  • Portable and easy to store

What We Don’t

  • The battery box will stay protected from moisture unless it is sealed with duct tape.
Eccotemp L10 Portable Water Heater w/ EccoFlo Diaphragm 12V Pump and Strainer
44 Reviews
Eccotemp L10 Portable Water Heater w/ EccoFlo Diaphragm 12V Pump and Strainer
  • Includes 3.5' hose and CSA regulator for use with standard 20lb grill...
  • Battery igniter means no electricity needed
  • 2.9 GPM(Gallons per minute), 50 PSI, 12 Volt, 4.4 Amp Pump
  • Liquid Propane Powered

Last update on 2022-01-26 / Affiliate links / Images from Amazon Product Advertising API

10. Tengchang 10L 2.6 GPM LPG Gas Propane Instant Tankless Hot Water Heater Boiler Bath


  • Type – flue duct vent type
  • Weight – 2.2 pounds
  • Dimensions – 24 x 13.6 x 5.9 inches
  • Voltage – 20000 Wattage
  • Flow – 2.6 GPM

Additional Features: based on advanced combustion and energy-saving technology, reduces burning and noise gas consumption, starts at low water pressure, manifold auto protection for safety, automatically shut down gas power, controls both cold and warm water, modern and sleek design

This propane tankless water heater by Tengchang is an affordable option perfect for light applications. It delivers high water heating capacity but is not portable and ideal for indoor installation online. With a 4.3-inch flue duct for venting, you can easily use it for off-grid cabins and recreational vehicles.

It is electronic ignition powered by 2 D-cell batteries, and hence, requires no electricity. It requires a minimum working pressure of 3.6 bars and maintains an external air temperature of at least 17.6 Degree Fahrenheit. The maximum air temperature is 113 Degree Fahrenheit. 

It is a compact water heater that can be installed indoors as it would not deliver hot water when the weather is cold outside. It is an energy-efficient model holding up to 80% efficiency. 

What We Like

  • High energy efficient saving.
  • Advanced combustion technology reduces gas consumption.
  • Reduced burning noise.
  • Low water pressure startup.
  • Manifold auto protection.
  • Ion flame inspection.
  • Controller design.
  • Overwater pressure protection.
  • Sleek and compact appearance.

What We Don’t

  • Performance varies depending on the outdoor temperature levels.

No products found.

As the name refers, a propane tankless heater uses propane as a fuel. Such heaters are also known as liquid propane tankless water heater. They need proper venting facilities and must be installed safely to avail of desired performance and purpose.

How Tankless Water Heater Works?

The demand for these heaters is increasing at a fast pace. Such heaters have become the need of almost every household. It is because these heaters are cost and energy-efficient in the long run. 

Propane tankless water heaters work the same way as an air conditioner blows air into the refrigerant coil, which cools air and circulates the same through a duct. The circulated cool air then cools the room temperature.

They use propane gas as a fuel to warm water and flow the same through a coil. The coil is heated by the gas ignited burner that warms up the water. So, when you open the tap, the heated water travels through it and is available for use. When the tap is closed, the heater shuts automatically.

The propane tankless water heaters use advanced technology to sense demand and adapt accordingly without requiring additional storage facilities. For this reason, they are also called ‘on-demand’ heating system.

Buying Guide for Propane Tankless Water Heater

Before we list down the various factors to consider buying a propane tankless water heater, you must first understand the various kinds of tankless heaters available in the market.

Whole-House Tankless Water Heater

These kinds of water heaters support abundant large water, and hence, are perfect for the entire home. They offer a large flow rate and maintains a constant supply of hot water. These heaters are suitable for big families.

Outdoor and Indoor Propane Tankless Water Heaters

This one is designed for outdoor and indoor use need dual installation points. To install them indoors, you need to arrange the vent pipes to allow the outflow of gas. Alternatively, the outdoor tank comes with freeze protection to adequately serve during extreme winters.

Such heaters have very specific requirements. The ease of installation depends on the model you select. It is always best to gain professional installation for hassle-free operation and longer service life.

Portable Tankless Water Heaters

These are compact and space-saving designs ideal for small families or light residential applications. They come with a carrying handle and can be conveniently installed. It is better to take the flow rate of such heaters into consideration to ensure they adequately serve your end purpose.

Their portability makes them an ideal solution for camping as well. The features and performance of such heaters depend on the type of model you select.

Condensing Propane Tankless Water Heaters

Such water heaters work the same as natural gas tankless heaters. They require used or wasted gas to be released through venting paths. They are energy savior and recover gas missed because of greenhouse gas emissions.

Small Propane Tankless Water Heaters

These water heaters are small in size and do not occupy much space. They are designed for nuclear families or small houses. Their flow rate depends on the size and it’s a maximum of 3 gallons per minute. 

Benefits of Using Tankless Water Heaters

These heaters are high in demand because of various benefits offered by them.

Instant Supply of Hot Water

One prime benefit of propane tankless water heaters is that they offer consistent and instant hot water supply.

Hence, you never have to worry about running hot water while bathing or performing any other activity.

Also, you don’t have to keep them on for long hours before using them. Just switch them on when you want to use them thereby saving electricity bills.

Always Offer Clean Water

Tank water heaters always store a specific volume of water for heating, which is then supplied when you use it. If you are not using the heater for a long time, the water remains stored and becomes dirty. This is never the case with tankless water heaters as they never store any leftover water. Hence, you always get a clean water supply.


Most of the propane tankless water heaters emit less carbon-di-oxide and come with NOx certification. Even, propane is a clean fuel that generates less pollution. Hence, these water heaters are absolutely safe for the environment.

Longer Service Life

In comparison to tank water heaters, the quality of tankless water heaters is retained for a longer time. As a result, they are able to serve for more years thereby saving money.

Low Repair and Maintenance Costs

These heaters involve a low cost of maintenance and repair. They save you a lot of money.


Most of these tankless water heaters are compact, lightweight, and portable. They are space-saving designs, which can be installed anywhere. 

Factors to Consider When Buying Tankless Water Heaters

Choosing the best propane tankless water heater is important to make sure you get the best performance and uninterrupted supply. Also, only the best model and optimally use energy and save you money on utility bills and maintenance. Hence, we suggest considering the below-mentioned factors before finalizing your decision.

Flow Rate

It is one of the most important factors in selecting the right heater. For a small family or light residential application, a small heater with an optimum flow rate is ideal. But if you have a big family with numerous members or multiple bathrooms, we suggest picking a heater with a higher flow rate.

Warranty and Pricing

These are two important factors to consider while buying a tankless water heater. The model you select must be within your budget. Most importantly, it must be covered with a decent warranty period. Both these factors are vital to ensure you get proper customer support and avoid spending too much on maintenance.


The size of your tankless water heater definitely matters. For a permanent option, it is best to buy bigger heaters with a high flow rate and sound heating capacity. But if you are sure your requirement will always be limited, you must invest in a small-sized water heater, which is easy to store and carry.


For those living in moderate climate conditions, it is best to select a heater with normal heating capacity. However, those living in extreme cold require powerful heaters.

Hence, do check the minimum and maximum temperature range to make sure your heater serves well even when it is cold outside.

Energy Efficiency

The energy efficiency rating of a heater is essential to make sure it does not consume more energy than needed. A heater with an energy star rating saves money, uses less energy, and performs better in reducing carbon emission.


A heater can be dangerous to the users if it is not equipped with proper safety measures. Hence, make sure the heater you pick comes with rich safety standards. At the same time, it must be engineered with high-grade components and a durable body.

Frequently Asked Question [FAQ]

  1. Are tankless water heaters more energy-efficient than traditional water heaters?

    A. Yes, these are more energy-efficient than traditional water heaters. It does not store water and meets an on-demand hot water supply. There is no standby heat loss, and hence, saves 20-30% energy savings.

  2. What is the cost of a tankless water heater?

    A. The price of these is twice the cost of the tank-based water heater. There is also the cost of installation and installing new venting and running electricity may add up to the cost.

  3. Is it possible to install a new tankless in the same area as the old hot water heater?

    A. Most of the heaters have to be mounted on the wall. You can also install it in the area of your old hot water heater.

  4. Are tankless water heaters useful with hard water?

    A. Yes, based on the model you select, it is possible to use tankless water heaters with hard water. But at the same time, you have to get it serviced on a frequent basis.

  5. Can I install a tankless hot water heater on my own?

    A. Yes, most of the tankless hot water heaters come in ready to use form. You can install them easily. However, we still suggest hiring a professional to get perfect installation and make sure that there is no damage met during the time of installation.

Editor’s Pick

Based on the reviews and after considering various aspects, we have picked the top 3 water heaters.

Our first pick the Rinnai RL94iP HE+ Tankless Hot Water Heater, Propane / 9.4 GPM, Indoor Installation, which is a well-engineered design with Energy star certification. It offers high energy efficiency and ensures there is no wastage of water. The best thing is it lets you connect to five outlets

simultaneously. Hence, you don’t have to purchase a separate heater for every bathroom or space. It is integrated with numerous advanced features and safety mechanisms. It is best for indoor use.

Our second choice is the Camplux 5L 1.32 GPM Outdoor Portable Propane Tankless Water Heater, which comes with CSA certification. It works well in extreme weather conditions and supplies consistent hot water on demand. This heater saves energy, protects against accidental hazards, portable, and designed using high-grade components. It is ideal for indoor and outdoor use.

Our final pick isEccotemp L10 2.6 GPM Portable Tankless Water Heater, 1 Pack that comes with an adjustable water pressure range. It allows to manually regulating water pressure. It is great for outdoor use. It comes with weatherproof rain cap and integrated with features like battery-powered ignition, automatic safety shutoff timer, convenient setup, and works well with all types of hose and regulator. 


Buying a tankless water heater is an ideal solution in modern times. It is because already resources are scarce and these heaters help saving energy. Also, they are cost-efficient and use very less amount of propane gas to generate heat. Most importantly, they perform well even when the temperature is extremely cold.

So, shortlist your preferred model for propane tankless water heater from our list and sure you will gain long-term benefits. 

In a Hurry [Quick Glance]
Takagi T-K-Jr2-IN-LP Indoor Tankless Water Heater – It is one of the smallest units ideally serving light residential and radiant heating applications. The compact and lightweight along with affordability and easy installation make it a great product. Integrated with various safety features, energy efficiency certification, regular hot water supply, and high BTU range are its major features. 
Rinnai RL94iP HE+ Tankless Hot Water Heater, Propane / 9.4 GPM, Indoor Installation
It is a well-constructed heater with Energy Star certification rendering up to 40% efficiency and ensuring less wastage of hot water. Can be connected to five outlets at a point without leading to reduced water flow. Integrated with basic safety features but backed with years of warranty. Affordable solution with easy installation.
Rheem RTGH – 95XLP Prestige Propane Outdoor Whole House Low NOx Condensing Tankless 9.5 GPM Water Heater
This tankless water heater comes with efficient stainless steel condensing heat exchanges and .94 Energy Factor (EF). It has a 2-pipe direct vent system designed for PVC pipe. Digital remote control, 10-Feet thermostat wire, and industry best .26 GPM makes it a worth buying.
Camplux 5L 1.32 GPM Outdoor Portable
This is a CSA certified tankless water heater with the lowest water pressure startup at 3.0PS. It works well with 12V 1.2GPM water pump and a maximum temperature rise of 46 Degree Celsius. Supplies 1.32 gallons per minute hot water, saves energy, protection against accidental hazards, portability, and industrial-grade engineering makes it a great product.
Eccotemp Fv112-LP Liquid Propane Gas Tankless Water Heaters
This gas-powered tankless water heater is rated at 3.6GPM. It activates when in use. Ideal for indoor installation, equipped with various safety mechanisms, easy to read digital temperature display, safe electronic ignition system, UL-listed cord, and durable body are some of its prominent features.
The Takagi water heater is a compact design available at affordable prices. It consumes very less energy and consistently heats water ensuring uninterrupted supply. Outlet, inlet thermistors, regular temperature monitoring, compact and lightweight, and easy to use features make it perfect for regular home use.
Rinnai RUC98iP Ultra Series Propane Tankless, Concentric/Twine Pipe Installation
Boasting ultra-low NOx emission and saving energy up to 96%, this is a space-saving design that is easy to maintain and install. Designed for indoor installation and delivers a high BTU of 199000. It does not include any advanced features, but durable, long-lasting, resistant to corrosion and convenient use makes it a great investment.
Rheem RTG-64XLP 6.4 GPM Low NOx Outdoor Tankless Propane Water Heater
This compact, lightweight design is equipped with standard safety features. Remote control operation and excellent flow rate are its highlights. Meant for outdoor use only, not environment-friendly, available at an affordable price, serves high demand applications
Eccotemp L10 2.6 GPM Portable, 1 Pack, White
With adjustable 20-80 PSI water pressure range, manual water temperature controls, and removable weatherproof raincape, this heater is perfect for outdoor showers, camping. Battery-powered ignition, 20-minute automatic safety shutoff timer, pressure activated, field-tested to 5,500ft elevation, easy to use and setup works seamlessly with any hose and showerhead. 
Tengchang 10L 2.6 GPM LPG Gas Propane Instant Tankless Hot Water Heater Boiler Bath
Automatic ignition system, flame failure protection device, fitted with overheating and pressure safeguard, gas, and water combination unit, mains power not needed, 20-min off self-timer, suitable for winter and summer.

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