Home » Water Heaters » Top 5 Best Propane Tankless Water Heater Devices on The Market

Top 5 Best Propane Tankless Water Heater Devices on The Market

Jennifer Hansen
Last Updated on
by Jennifer Hansen

Finding the best propane tankless water heater can give your home the gift of unlimited hot water, which many homeowners find to be a welcome luxury.

Tankless water heaters offer several features and benefits, including saving you time, water, and money. Check out our list of propane tankless water heater reviews to see what units we recommend.

Best Propane Tankless Water Heater
  • Gallons per Minute: 4
  • Dimensions (inches): 13.7 x 25 x 5
  • Weight (lbs): 28.9
  • Gallons per Minute: 2.64
  • Dimensions (inches): 12.8 x 5.91 x 20.28
  • Weight (lbs): 23.8
  • Gallons per Minute: 2.7
  • Dimensions (inches): 6.9 x 13.6 x 23.6
  • Weight (lbs): 21
  • Gallons per Minute: 2.64
  • Dimensions (inches): 12.8 x 6.1 x 21.65
  • Weight (lbs): 23.6
  • Gallons per Minute: 4.23
  • Dimensions (inches): 25.6 x 15.7 x 7.5
  • Weight (lbs): 23.4

Best Propane Tankless Water Heaters

1. Eccotemp i12-LP Propane Water Heater


The Eccotemp i12-LP water heater is ideal for small to medium hot water demands and features a sleek black front panel and fully automatic controls, so it looks good anywhere in your home. This unit is powered using liquid propane and provides up to four gallons of hot water each minute.

The heater measures 24 inches by 14 inches and plugs into a standard household 110-Volt outlet using the supplied UL-listed power cord. It also features ½ inch water lines and a ½ inch gas inlet in addition to the backlit control panel where you can control the temperature.

The Eccotemp water heater is intended for indoor use only and mounts to your wall. It doesn’t require batteries, and it uses horizontal venting as part of the packaging. You’ll also find that this unit is energy-efficient and uses only 2 watts of power when in it’s in an idle state.

During operation, this unit requires 1.07 amps of power that heat the water and run the internal exhaust fan and display.

  • A modern black tempered glass panel on the front
  • Fully automatic control of the temperature and solid flow rate
  • Includes a child lock and energy-saving modes
  • Uses a standard 110-volt electrical outlet
  • Does not work above 2000 ft of elevation
  • Doesn’t come with cleanout valves for routine cleaning

2. Camplux 10L 2.64 GPM High Capacity Heater


The Camplux high capacity tankless water heater has a control panel with two dials and a digital color display so you can easily make adjustments. This water heater plugs into a standard 120V outlet and uses a UL-listed cord for added safety.

You’ll also find added safety features like overheat protection that makes this unit safe for use in smaller spaces like your home, an apartment, or vacation home. There are additional safety protections, including:

  • Flame failure protection
  • Dry combustion protection
  • High water pressure protection
  • Lower water flow protection
  • Anti-frozen protection

The additional protective measures on this propane tankless water heater are not standard across all other propane tankless water heater units on the market. Still, they do make this unit an ideal option for safety-conscious homeowners, or vacation homes where you only visit periodically.

  • Several different safety features for added safety
  • Color digital display for easy temperature reading
  • Eco and gas switch for gas flow and temperature controls
  • Separate water flow control for ease of use (decent, but not great, flow rate)
  • Requires two D batteries
  • Doesn’t include a propane hose or regulator in the packaging

3. Marey Power Digital Panel Tankless Water Heater


The Marey tankless water heater doesn’t require electricity, making it an ideal upgrade for rental homes or areas of your house where a power outlet isn’t present, but you need hot water fast. Just not that the flow rate isn’t spectacular.

It features a sleek silver exterior with three dials on the front for adjusting the settings. This water heater measures 23.6 inches by 6.9 inches by 13.6 inches, making it small enough to fit anywhere in your home or apartment. The display panel is rather small on this device, but easy to read, and this water heater only uses gas when water is heated.

You’ll need a couple of batteries to power the display on this heater as it does not connect to a power source. The venting is on the top of this device, and the housing features ample venting for heat dissipation once it gets mounted to the wall.

  • Sleek silver exterior blends into your home decor
  • Simple control panel with three dials (decent, but not great, flow rate)
  • Uses a standard ½ inch gas line already found in many homes
  • Relatively easy to install since it doesn’t require an outlet for power
  • Requires batteries to operate
  • Higher water flow rates cause some temperature loss

4. Camplux 10L Outdoor 2.64 GPM Heater


The Camplux tankless water heater is ideal for camping and outdoor applications where you do not have access to electricity but can use portable propane tanks.

For outdoor-friendly applications, the Camplux portable propane tankless water heater offers a compact design, and different functions to help save on energy. This device connects to a source of propane, typically a portable tank, and there’s also a showerhead so you can set up a portable shower anywhere.

This unit is ideal for showers while camping, but can also work for outdoor shower areas around your home. This propane on demand water heater comes with a CSA approved regulator so you can be confident it’s safe. It comes with adapters to make the setup process more manageable.

The operation panel on this unit has three dials that easily make small or large adjustments and set exact temperatures using the digital display. This lightweight unit is easily mounted on the wall or the side of an RV, trailer, or other solid structure. It uses two D batteries, so no electrical outlets are necessary.

  • Advanced safety protection against freezing, and overheating
  • 68,000 BTU/hour maximum power output
  • Includes a regulator and adaptors in the package
  • Compatible with a water pump
  • Requires two D batteries
  • You can’t use it when it’s below zero degrees Fahrenheit in outdoor applications

5. Thermomate ZERO16 4.23 GPM Propane Water Heater


The Thermomate ZERO16 has a space-saving design and several safety features that make it ideal for any indoor application and some outdoor applications. This water heater measures 25.6 x 7.5 x15.7 inches and has a maximum of 109,000 BTU per hour of power output.

This device also has two magnetic sensors to detect water flow, which allows it to turn on with even low pressured water flow in rural areas or when you’re using an RV or boat. This energy-saving design also has several safety features like overheating protection, flame out protection, anti-freezing protection, and high water temperature protection.

The high water temperature protection ensures the water doesn’t get hot enough to burn your skin. The anti-freezing technology includes a valve that is triggered to open and release residual water to avoid damaging the device in cold temperatures. This propane tankless water heater also features the highest flow rate of all that we’ve reviewed here. And, flow rate is important if you have a large household or need to serve multiple purposes at the same time, like someone showering, a dishwasher, or running the laundry.

  • Requires only 0.7 PSI of water pressure to trigger the heater
  • Good flow rate, makes 4.23 gallons of hot water per minute
  • Package includes extra parts to make installation easier
  • Simple single-dial design and small digital display
  • Water produced is very hot on the lowest setting
  • Requires two D batteries

Do you Really Know What a Propane Water Heater is?

We hope you enjoyed reading the above reviews or our view of the best propane tankless water heater choices currently on the market. Hot water is important in our daily lives and a good propane tankless water heater can be a comforting thing for the household. Now that we’ve covered the best propane tankless water heater reviews above, let’s make sure you have a good understanding of what a propane tankless water heater is and how it works.

Tankless water heaters heat water directly instead of storing the warmed water in a tank. These appliances can run on different fuel types, and propane is one of the more popular options available that exist in many homes, whether they have a tankless or traditional water heater.

You may be surprised to learn that a propane tankless water heater on demand takes up less space than a conventional water heater since there is no tank, and they are more efficient at heating water for your home.

Since the heat is applied directly to the water before it flows through the pipes to its destination, a propane tankless water heater allows you to get hot water in seconds with minimal heat loss.

Propane tankless water heater units often resemble large briefcases and feature sleek exteriors that take up a minimal amount of space in a utility room or closet.

A propane on demand water heater uses propane as the fuel to heat your water. You will need to pick one that can produce the amount of water your household needs. There are many different applications for the best propane tankless water heater units in the home, and it’s possible to have more than one propane tankless water heater if your hot water demands are high.


Why You Should Buy Propane Heaters

There are some distinct advantages to purchasing a liquid propane or lp tankless water heater for your hot water, and these devices can use the same propane that your other household appliances use as a source of fuel. Here are some other advantages to propane tankless water devices that set them apart from other water heating devices.


The Department of Energy in the United States estimates that a tankless water heater that uses propane as its fuel source can save between eight and 34 percent more energy than a traditional storage-tank water heater.

This difference equates to roughly $100 in savings each year for most homeowners, which is considerable since most households spend between $400 and $600 each year on water heating for their home.

Tankless water heater units are always going to be more efficient than a conventional water heater with a storage tank. These devices focus on minimizing the energy required for recovery, standby, and cycling of the water in your home.

The best propane tankless water heater devices also provide a score or percentage for how efficiently the fuel they use gets translated into hot water produced. This percentage takes into account all of the energy required by the device for all of its functions.

Reliability and Longevity

The best propane tankless water heater has a life expectancy of around 20 years, which is considerably longer than the average lifespan of a tank water heater at 8-12 years. This extended lifespan also comes with limited maintenance required and excellent performance when the demand does not exceed the device’s output.

If your home requires more hot water than your lp tankless water heater can produce on its own, you can install two tankless water heater units to work together.

Installing a propane on demand water heater is a reasonably straightforward process, and the average plumber, HVAC specialist, or contractor can perform the work in a few hours.

These devices are highly reliable since they don’t store any water and heat water quickly. Therefore, there aren’t any tanks to leak or large quantities of water to keep warm and waste energy. In seconds, a propane tankless water heater can deliver hot water to your faucet, and keeping them in good working order is easy. Just make sure that you understand the flow rate of the propane tankless water heater and it provides enough flow rate or enough gallons per minute to suite your needs.

Popane tankless water heater units also come with more extended warranties than your average water heater, and they are far more durable and create less waste when they’ve reached the end of their useful life.

Propane tankless water heater devices generally have a warranty around 15 years or so, and there’s no risk of water ending up all over your floor like there is with a storage-style water heater.

Virtually Unlimited Hot Water

Homeowners love the idea of unlimited hot water, and with prices on propane tankless water heater devices decreasing over time, it’s a more accessible option for many households. When you turn your tap on, it’s not uncommon for it to take a minute for the water coming out to get warm. This wasted water adds up over time and shows on your utility bills.

An lp tankless water heater removes this waste and depending on the location of your propane on demand water heater and the tap in question; you can get hot water in around three seconds. Propane tankless water heater devices come in different sizes and with varying flow rates so you can get hot water to a single room such as a bathroom or your whole house.

If your need for hot water is high, you can install two or more propane tankless water heater units in appropriate sizes for the demand in that area of your home.

A single tankless water heater can supply ample amounts of hot water for most households. If you have multiple points that need hot water simultaneously, having a second unit can ensure there’s enough hot water to go around.

Space-Saving and Modern Features

Many modern propane tankless water heaters feature a touch-sensitive operation panel, a digital display, and other features that make them straightforward and efficient. Homeowners can select exact water temperature settings for their hot water, alter the amount of gas available, and enjoy better safety features than you’d find in other types of water heaters.

Propane tankless water heaters have a reputation for safety. The number of safety features present is always evolving and differs between brands. For outdoor applications, you’ll want to opt for a unit that has freeze protection even if you don’t live in a particularly cold climate.

There is also overheat protection and flame up protection to ensure your unit stays an appropriate temperature and doesn’t become a fire hazard. Some models meant for outdoor use also feature shower heads, and different modes so you can set a “summer mode” to save energy, or a “winter mode” to prevent residual water from freezing inside the unit.

Propane tankless water heater devices also mount to a wall, so there’s no floor space wasted, but there is a set amount of clearance that these devices need around them, which is generally 3-4 feet, but you should check the building codes in your area.

Newer features include a child lock for your lp tankless water heater that prevents unwanted changes to the operation. Some tankless water heaters also allow you to turn them off completely or put them in “vacation mode,” which is ideal for households that often travel or for part-time residences.


Most modern tankless water heaters can blend in just about anywhere since they are relatively small and can easily fit in spaces like closets or utility rooms. Since these models mount directly to the wall, they require no floor space, which frees up several options for where you can install them.

These units also tend to have sleek and modern looking exteriors, and you can find them in discrete colors like black, white, and silver. Keep in mind that some manufacturers offer more than one color option, but these choices aren’t prevalent.

You should not try to decorate or cover your tankless water heater with decorations. Still, homeowners have them mounted discreetly in kitchens, bathrooms, closets, utility rooms, mudrooms, and other parts of the house where it’s convenient.


Propane Vs. Electric Water Heaters

Propane and electric tankless water heaters are both excellent options for your home for providing hot water, but there are a few considerations to make before you settle on a fuel type. There are advantages and drawbacks to both, but on the whole, either one is more efficient than most storage-style water heaters.

Fuel Type and Energy Efficiency

The primary difference between electric and propane-fueled tankless water heaters is that the electrical ones are a bit more efficient at an average of 98 percent efficiency, and propane typically has an efficiency rating of around 80-85 percent. In some situations, a propane on demand water heater is less expensive to operate and often lasts longer than an electric version for making hot water for you.

If you already have electrical hook-ups suitable for a tankless water heater, then there’s a minimal cost associated with installing an electric tankless water heater. If you have to rewire part of your home to get power to your tankless water heater, you’re looking at potentially thousands of dollars, but each home is different.

As long as your electrical source is within 50 feet of your tankless water heater, it shouldn’t be a problem to have one installed, but you can seek a trained professional’s advice to help you make that call.

Propane is another fuel type commonly found in homes, and depending on your situation, you may qualify for a federal tax rebate. Some states offer similar incentives for high energy efficiency, so it’s worth an online search to see what kind of credit you can get to cut down on the cost of getting a tankless water heater.

Electric tankless water heaters are 99 percent efficient, but unfortunately, they don’t often qualify for rebates, and many don’t have an Energy Star rating. Propane is another excellent option that’s widely available, but you’ll want to think about the cost associated with having propane added to your home if you don’t have it already.

It is also helpful for you to note if the gas tankless hot water heater you are considering is classified as low nox. Low nox refers to a burner that has reduced emissions of certain chemicals (nitrogen oxide & nitrogen dioxide). So, keep an eye for low nox as a good feature for your gas tankless hot water hear. Also useful are units that feature stainless steel tanks, stainless steel housings, and other stainless steel parts.


You should figure out how much water your home requires and buy a tankless water heater that is the appropriate size. It’s ok if your calculations aren’t precise, but you need a general idea of the flow rate (typically expressed in gallons per minute) required to ensure you have all the hot water you need.

It’s not advisable to get the biggest tankless water heater available. These are often more than the average household needs, which means that some energy consumption will go to waste. These larger capacity units also take up more space and require a specific amount of clearance around them, limiting where you can install one.


The cost of your tankless water heater will vary based on several features, but most of them are more expensive than a conventional tank water heater but last almost twice as long. When you compare propane and electric tankless water heaters, the electric ones tend to be more expensive, but they also have higher energy efficiency to save on energy costs over time.

The cost of a tankless water heater is also more than a storage or traditional style water heater. Still, the difference is that you’ll save on your energy bills by eliminating a considerable amount of wasted energy.

Water heaters with a tank require a far more significant amount of energy to maintain their temperature. This energy loss that occurs while they are in standby mode is not something that happens with a tankless water heater.

Depending on your water usage and your home, you can expect a tankless water heater to pay off the difference of the upgrade in as little as 2-4 years. Some homeowners report annual savings of up to $250, but many variables can impact this number.


Tankless water heaters don’t require special water, and you can use conventional well water without having to treat it first. Some harder water will benefit from a softener before running through the tankless water heater, but it’s not required.

During installation, you can decide if you want to add a softener, or if you want to skip this step for your home. You can also use inexpensive materials for the venting portion of the installation, and it’s ok to use inexpensive PVC pipe and vent directly through a nearby exterior wall.

Unlike traditional water heaters, you don’t need to vent through the roof, which makes installation a more straightforward process, but if that vent is available, you can often use it for a tankless unit.

The combustion fan in the tankless water heater blows the exhaust away. There are many different venting options that you can use during installation to maximize effectiveness while also minimizing cost.

If you have hard water, you might want to choose a unit that alerts you when it needs maintenance like descaling. Most modern units have a sensor or schedule programmed into them, and they’ll alert the homeowner when it’s time for a flush. This process is easy to do and takes a few minutes, and using a softener can lengthen the amount of time between flushes.

See our full electric vs gas water heater comparison.

Final Thoughts

When you’re looking for the best propane tankless water heater for your hot water, you’ll want to figure out your water usage and select a unit that can adequately meet your needs. Many homeowners worry that these efficient water heaters require complicated and expensive installations and that they are costly. However, the energy savings alone may surprise you, and many of the units are also easy to install, where you currently have your traditional water heater.

It’s also worth noting that propane water heaters without a tank are much more efficient than units with a water storage tank, and this conservation of energy adds up over time. Modern tankless water heaters also take up far less space, which means homeowners have more options for where they can put them than they would have with a traditional water heater.

Finally, tankless water heaters work with both soft and hard water and require very little maintenance. These units also have a far longer life than a conventional water heater, and they don’t need complicated venting. Modern tankless water heaters also feature many different safety functions that make them a safe option in various settings and applications.

Related Articles:

Sign Up to Our Newsletter

Join our 500,000+ community to get our "everything home" newsletter with the latest product news, gear reviews, and buying guides!

We HATE spam. Your e-mail will never sold or shared!

About Jennifer Hansen
Jennifer Hansen
Jennifer is a mother of 2 and has always been a careful shopper, determined to make the best buying decisions for her family. She loves researching the marketplace to find the right products for her household. She leads a small but mighty team of writers in bringing you WaterFilterSpot.
Jennifer Hansen
Leave a Reply

Your email address will not be published. Required fields are marked *