Top 5 Best Propane Tankless Water Heater Reviews For Less Energy Costs

The best propane tankless water heater is quite the same as the natural gas tankless water heater, some of them are both propane and gas available design. It saves more energy and is more eco-friendly than electric tankless types. If you have trouble choosing the best propane-powered water heater, just look at the reviews we made for you.

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Top 5 Best Propane Tankless Water Heaters

What Is Propane Tankless Water Heater?

The propane-powered heater, as the name suggests, is a kind of heating machine powered by propane. It is also known as liquid propane tankless water heater and propane gas tankless water heater. Venting facilities are also needed and you should make sure that the machine is installed safely.

Features of Propane Tankless Water Heater

1. Clean water offered

For tank water heater, a specific amount of water is stored in the tank for heating and using, after a long time using, the tank inside easily gets corroded and thus the water offered is not as clean as it should be. With a propane heater, you can get clean hot water for both taking a bath or hand washing.

2. Instant hot water offer

One excellent performance of propane heater is its constant hot water, you do not need to worry that running out of hot water in bathing. It is able to provide constant hot water in a few minutes or even a few seconds.

3. Long service life

Most of the high-quality water heater lasts about twenty years, while a tank water heater lasts no more than 15 years. Thus it saves much money on replacing largely.

4. Less pollution

Liquid propane is adopted as a major power source for propane tankless water system, it is one of the clean fuel that uses so it brings less pollution to the environment.

5. Space saver

The propane water system is smaller and occupies a smaller piece of land compared with a tank water heater. For a tiny home, you can still install it anywhere you want.

6. Save money

Propane heater heats water only when you need it. And the waiting time is quite short, it takes about 40-60 minutes for hot water to flow, thus it saves a lot of money on heating bills as well as water bills per month.

tankless water heater reviews propane
propane powered tankless water heaters reviews

Electric vs Propane Tankless Water Heater

Electric tankless water heater:


  1. Flexibility on installation spots
  2. No worry of pipelines or ventilation
  3. Easy installation
  4. Do not directly emit carbon dioxide


  1. Need constant maintenance
  2. Using costs can be high
  3. Less powerful

Propane Tankless Water Heater


  1. Low using costs
  2. Energy efficient
  3. Eco-friendly
  4. More powerful


  1. Need ventilation
  2. Expensive on upfront costs
  3. Difficult on installation

Top 3 Best Propane Tankless Water Heaters

Different Types You Should Know Before Buying

Propane tankless water heater can be divided into portable type, whole home type, indoor type, outdoor type, and condensing type, etc.

1. Portable tankless water heater

The portable tankless water heater is designed for small tiny home and travel use. The weight light and can be carried anywhere conveniently. The flow rate of portable tankless water heaters is normally small, supporting bathroom and kitchen faucet at the same time.

You can also use it on RV or use it on camping. Because of its special using applications, the installation of it is normally simple. If you have any other inquiries or interest in the item, we have made a detailed portable tankless water heater reviews for you. You can get more information there.

2. Whole-house tankless water heater

The whole-house tankless water heater is designed to support enough large water for whole-home use, so the flow rate of it should be large enough and needs to provide constant hot water.
There are many other factors to consider in choosing whole house tankless water heaters, if you have the interest, please get to our best whole house propane tankless water heater reviews and get the information that you need urgently.

3. Indoor & outdoor propane tankless water heater

Indoor and outdoor tankless water heater refers to two installation spots, for the indoor propane heater, you need to get venting facilities to let out gas. While outdoor tankless water heater needs freeze protection to protect the machine in cold or severe weather.

Installation can be a difficult thing for most people, if you have trouble in it, please find a professional to help you. Installation is largely related to the working performance of the heating machine. For more information, you can click into our best outdoor water heater reviews.

4. Small propane tankless water heater

The small tankless water heater is normally used for a tiny home, it is designed to compact and occupies an only small piece of land on your wall. Also, the flow rate of which is accordingly low, reaching up to 3 gallons per minute.

If your home is crowded with all kinds of staff or needs something small to support one bathroom or one faucet only, we suggest the small type for you and you can choose the most suitable one from the best small water heater reviews we made for you.

5. Condensing propane tankless water heater

The same as natural gas tankless water heater, wasted or used gas needed to be emitted through venting devices. Condensing tankless water heater will help save much energy and recovers gas that is missed to reduce greenhouse gas emissions.

Some of the heating machines are also designed with Low NOx, so less carbon dioxide is produced and emitted.

best liquid propane tankless water heater
best liquid propane hot water heater

Best Propane Tankless Water Heater Reviews

1. Best Overall – Takagi T-KJr2-IN-LP Indoor Tankless Water Heater

T-KJr2 series of Takagi tankless water heater is always the hot selling type no matter for the propane type or for the natural gas type.

best propane tankless water heater review
best propane tankless water heaters




  • 6.6 GPM

The flow rate of this unit is the middle standard, able to provide hot water for two bathrooms and one kitchen faucets the same time in warm areas. But in the cooler region, the flow rate may drop to 3-5 gallons per minute.

  • Lightest and smallest

This heating machine is the lightest and smallest among all the Takagi line of products, it is easy to be installed.

  • Above 150 degrees F temperature

The water temperature of the machine reaches over 150 degrees F, perfectly meets the demand for home use. It can also be controlled remotely, but you need to buy an extra remote controller.


  1. Digital remote control
  2. Demands minimal maintenance
  3. Lightweight
  4. Demands a power input of 140000 BTU per hour, 81% energy efficiency
  5. Easy installation
  6. 10+ years warranty guaranteed


Light working noise

2. Best with Large Capacity – Rinnai RL94iP Propane Tankless Water Heater

Rinnai propane tankless water heater is highly praised for its delicate design and large flow rate. It is said that the unit can be used for 30 years.

best tankless water heaters propane
best propane tankless water heater reviews




  • 9.4 flow rate

The flow rate of this unit is extremely large, able to meet the demand of three or four bathrooms used in warm areas and two bathrooms in cold weather. And it is powerful enough to constantly provide hot water for you, no matter you are bathing, or doing laundry.

  • Direct powered venting

Direct powered venting is used on the unit, a coaxial pipe is used to prevent using air from getting inside and to cool down the exhaust gas. And because of the closed system of the design, no cold or warm air from outside is able to let in after the machine is off.

  • No standby heat loss

The smart technology of it enables the machine heats water only when you need it, thus no standby heat loss occurs, making it an energy-efficient and money saver heater.


  1. High efficient
  2. No smell from direct vent
  3. No standby heat loss
  4. Long service life
  5. Modulated burning allows less fuel consumption
  6. Powerful


Coldwater sandwich

3. Best For Outdoor Installation – Rheem RTG-95XLP Propane Water Heater

This propane tankless water heater is perfectly used for middle-sized family use, outdoor installation frees the trouble of installing venting kits.

best tankless water heater for propane
best tankless water heater propane




  • 9.5 gallons per minute

It is also a large flow propane tankless water heater, reaching up to 9.5 gallons per minute. It is able to support multiple bathrooms and kitchen faucets hot water use the same time in cold areas.

  • Energy efficient

The power consumption ranges from 11000 to 199900 BTU per hour, the thermal efficiency is 82%. Freeze protection devices are designed to protect the machine in cold areas. But the manufacturer suggests it be used in warm areas.

  • 120 degrees F temperature

The maximum temperature of it is 120 degrees F, it is said that it can also be raised up to 140 degrees F with a small change on the remote control. However, you need to buy remote control separately.


  1. More powerful than other types
  2. Freeze protection equipped
  3. Work perfectly for whole-house situations
  4. Two gas options, one for propane and the other for natural gas
  5. Electronic ignition


Need to be installed by professional

4. Best Compact – Camplux Outdoor Portable Propane Tankless Water System

This is a portable propane tankless water heater, and the price of it is quite low compared with other whole-house types.

top rated propane tankless water heater
top tankless propane water heaters




  • Low flow rate

The flow rate of the unit reaches only 1.32 gallons per minute, thus it suits tiny home or travel use perfectly, but not able to meet the demand of whole house use. The water pressure required is only 2.5 PSI.

  • Easy operated

There are two buttons set on the machine, one is for gas control, while the other is for water flow control. You can turn it on and off quickly for controlling water flow starts and stops.

  • High-quality materials

The heat exchanger is made by stainless steel, together with copper water tank, it is highly heated resistance and corrosion resistance. The maximum temperature rise is 14.6 degrees F while the minimum being 46.4 degrees F.


  1. Low water pressure required
  2. Compact size for outdoor use perfectly
  3. Easy control buttons
  4. The anti frozen device equipped
  5. Heat resistance


Can not be used for middle-sized home or whole house

5. Best For Small Home – Eccotemp FVI-12 Liquid Propane Tankless Water Heater

Eccotemp propane tankless water heater of this type is perfect to be used in a small home for its low flow rate.

top 10 propane tankless water heaters
propane tankless water heater review




  • 3.6 gallons per minute of water flow

The maximum flow rate of the unit reaches only 3.6 gallons per minute, so it is not suitable for whole-house use but only for small home use only. It supports hot water for one bathroom and one kitchen faucet at the same time.

  • Electronic ignition system

It adopts a safe electronic ignition system and needs to be plugged into a standard 120v electrical outlet with a UL-list cord.

  • Easily read digital temperature display

The temperature and error codes show on the screen, two knobs are set to control temperature, one is for the usage of gas, while the other is for water temperature. Thus you need to adjust both of them for suitable temperature.


  1. Compact shape and space-saving design
  2. Energy efficient
  3. Light working noise
  4. Easy to install
  5. Perfect for small home and cabin


Not easy to adjust suitable water temperature

Best Portable Propane Tankless Water Heater

A portable tankless water heater is perfect for outdoor use and travel camping use. It weights light and can be carried anywhere you want. Followings are the best portable propane tankless water heaters:

1. Camplux Outdoor Portable Propane Tankless Water Heater

top rated propane tankless water heater
top tankless propane water heaters

2. Eccotemp FVI-12 Liquid Propane Tankless Water Heater

top 10 propane tankless water heaters
propane tankless water heater review


How Much Hot Water Do You Need On The Propane Water Heater?

You need 30 to 40 gallons for one or two people, 40 to 50 gallons for two to three people, 50 to 60 gallons for 3 to 4 people, and 60 to 80 gallons for five or more people. This is not the exact number but just an estimate that can help you out; you might find it different for example, large homes with a family of 5 or more can be comfortable with a 30 gallon and not 60 to 80 as estimated.

A family of two might find that a 30 gallon can not provide enough hot water for their needs. The type you need depends on how you use warm water, and before you buy a water heater to ensure that the tank size is accurate for you.

The way you use hot water will determine the number of gallons you need in the propane water heater.

What Is the Water Pressure Where You’ll Be Installing the Propane Heater?

When installing a propane water heater, the water pressure should be low. In this case, 50-60 Psi is good. The pressure of water is measured by Psi (pounds per square inch). If your home’s water pressure is more than 80 psi, you need to lower it to 50 or 60.

To lower it you need to use the pressure reducing valve that is located at the main water shut off, if there is no pressure-reducing valve, don’t attempt doing the job yourself instead call a professional to install it for you if you want your water heater to be in good condition.

Will You Install It Yourself?

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.

Keep in mind that installing a water heater requires particular skills such as plumbing, electrical, heating, ventilating, and even carpentry skills. If you are not good at this, don’t even try doing it because you might end up harming yourself really badly.

Therefore, it is simply not good to install it yourself remember that proper installation and maintenance prolongs its service life, but your safety comes first, you don’t want to install something that can result in a bad explosion.

Propane Vs. Natural Gas Tankless Water Heater

Propane and natural gas are fuels that are similar. They are both gaseous, readily available, and both clean-burning fuels for tankless water heaters. Natural gas tankless water heaters are mostly used at homes or on other buildings where it is available.

On the other hand, propane is also known as LP or rather LPG, whereby the L stands for liquefied, and it shows that propane can easily be liquefied and stored just by placing it under moderate pressure. Liquefying the gas causes it to need quite smaller storage containers, while for the case of natural gas, it requires higher pressures for it to liquefy unlike the propane; that is the reason why it is always stored and transported as a compressed gas.

The natural gas tankless water heater is piped into several homes, and it’s much cheaper than propane, it is readily available in the market for a lot of homes and business tankless water heaters. On the other hand, propane gas tankless water heater is easily available, and in fact, it can be delivered at your home. To add on that, it has more energy per gallon when compared to natural gas, that’s why there prices differ, it does not require large storage containers because it is stored and transported as a liquid.

Who Needs Propane Tankless Water Heater?

This water heater is a good option for your home because it’s efficient and when sized properly, it provides hot water all time, and it is quite easy. The propane tankless water heater is known to last much longer than a conventional water heater, but since the tankless water heater lasts longer, it does not mean it should not be taken good care of.

A family of 3or 4 will need 25 gallons of propane every month while one with more than five members will need 40 gallons of propane since that is the right amount that can do all their household chores.

Why Propane Tankless Water Heater

Most families prefer propane water heater because of its various unique reasons. It is simply the best heater that can be used at home; the reasons are as follows.

Offers instant water

With a propane water heater, you should never worry about running short of hot water. You don’t need to wait for long before the water is heated since it provides hot water immediately. That is very wonderful, and everyone would like to have this kind of heater, can you imagine you are in the middle of a shower and all of a sudden you run short of hot water? The propane water heater ensures that there are no such things happening.

Offers clean water

Some water heaters might produce dirty water. Sometimes simply the tank is corroded and can not produce clean water, but for the case of propane tankless water heater, you will always get clean hot water for taking a bath and for hand washing as well.


This water heater is of high quality and can last for up to 20 years, while other tanks can only last for 15 years. This saves you money because you don’t need to replace it any time soon.

Pollution is less

There is less pollution in the environment when using this kind of water heater because the liquid propane is one of the clean fuels that is adopted as a great source for propane tankless water system.

Saves space

The water system is small, and therefore, it occupies a smaller space as compared to a water heater.

Saves money

The propane heater only heats water that is needed at that time, having quite a short waiting time, thus saving a lot of money on heating bills per month.

How to Choose the Best Type For Your Needs?

Choosing the best propane heater can help you save much money for you, but there are a few tips you need to consider before selecting:

1. Temperature

You need to know and estimate the average temperature in urban areas and judge the maximum temperature you need. Most of the propane heater reaches up to 140 degrees F but it may drop a bit in cold areas.

2. Size

Before selecting, you should think about whether you need a large or a small water heater. If you do not have enough budget or a large space for a whole house heater, then you can get a small type. If you intend to get one for traveling or for camping, a portable heater will be a great help.

3. Flow rate

Different size of the home requires a different flow rate, for a small tiny home with one bathroom, 3 GPM tankless water heater is enough. But if you are a large family with three or even four bathrooms, you may need a 9 gallons per minute heater to support multiple uses. Besides, you can estimate the average water you will use per day, and decide which level of flow rate heater you need.

4. Energy efficiency

The high energy-efficient heater is sure to save much money for you, and because of less wasted gas, it is more eco-friendly and environmentally friendly.

5. Safety

The safety of the propane tankless water heater is the most important thing. Many water heaters are designed with self-protection systems, such as self-diagnosed device and freeze protection. These systems are able to protect the machine in dangerous situations and automatically stop it.

6. Price & Warranty

Price is, of course, the major concerns of yours, always buy something within your budget. Warranty of tankless water heaters are normally 10-12 years for the heating parts, some reach even 15 years. Long and satisfying after-sale service will help you a lot in later use.

propane tankless hot water heater reviews
propane tankless hot water heater


Propane tankless water heater is more energy-efficient and saves more money for you, some of them are both propane and natural gas available. If you do not have a gas pipe or want a cheaper type, you may choose the best propane types.

Here we picked out three best propane gas tankless water heaters for you to choose:

Tankless Water Heater Best Type
Best one for middle-sized family use Takagi T-KJr2-IN-LP Tankless Water Heater
Large flow rate one Rheem RTG-95XLP Tankless Water Heater
Best Portable type Camplux Outdoor Portable Propane Tankless Water Heater

If you want to know more information on other types of propane-powered heaters or want to get a detailed price, please feel free to check it out on Amazon.

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