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Best Tankless Water Heater Reviews 2021: Top 10 of the users choice

Tankless Water heaters are a smart, energy-efficient answer to your water heating needs.

Whether it’s while camping or for use at home, the best tankless water heater can save you money as well as negating the need for the bulky, giant water heaters of the past, which simply aren’t an option for everyone.

Some tankless water heaters even feature battery power so even those off-grid can take advantage of their usefulness.

Top 10 Best Tankless Water Heater Reviews:

Here is an overview of the 10 best tankless water heater reviews.

1. Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower

Eccotemp L5 1.5 GPM Portable Outdoor Tankless Water Heater

Key Features of Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower:
  • Ideal For off-Grid Use:

The Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower function entirely without electricity, featuring an ignition powered by two, 3V D-cell batteries and running on propane.

Without the need for electricity, this tankless water heater is ideal for off-the-grid usage and pretty much any outdoor application.

  • Great for showers:

A must-have camping accessory, the L5 Portable Tankless Water Heater is capable of putting out more than a gallon per minute of hot water and comes with a showerhead nozzle attachment with multiple settings, making it great for showering outdoors.

The temperature range is from 80F to 150F, so even finicky campers will be pleased by the shower feature’s capabilities.

  • Easy to use:

Everything you need to set up and operated the Eccotemp L5 is included with the purchase. Setup is simple, merely requiring connection to a garden hose and a propane tank.

  • Multipurpose:

Not only does the Eccotemp L5 function as a water heater and shower, but you can also take it anywhere you need hot water outdoors.

It’s great for washing cars in cold weather or washing animals like horses, who shouldn’t have to put up with an ice-cold shower and a cool autumn’s morning.

Additionally, you can also hook up the heater to a pressure washer, which ups its versatility and allows you to pressure wash for applications you may normally not do when cold water is traditionally involved.

  • Portable:

At 13lbs, the Eccotemp is lightweight and portable with compact dimensions of 16.5” x 11.5” x 5.5”.

Because it’s small yet powerful, packing it for a trip isn’t a chore at all.

PROS

  • 1-year limited manufacturer warranty
  • Lightweight and portable
  • Multipurpose
  • Propane-powered
  • Battery ignition
  • No electricity required—perfect for off-grid use
  • Ideal for showers with a multi-setting shower nozzle attachment
  • Easy setup, only requiring a garden hose and propane tank—all other components are included
  • 80F to 150F temperature range.

CONS

  • The required water pressure range is 20PSI to 100PSI.
  • While for most this won’t be an issue, not exceeding the recommended 100PSI may be difficult for some who’ve hooked up the heater to a high-pressure hose.
  • Like all propane-powered equipment, it must be stored away from fire and heat sources, which means it’s necessary to think ahead and not put it anywhere near campfires or lanterns.
  • That said, this is only a minor annoyance but worth mentioning.

2. EcoSmart ECO 27 Electric Tankless Water Heater

EcoSmart ECO 27 Electric Tankless Water Heater

Key of Features EcoSmart ECO 27 Electric Tankless Water Heater:
  • Robust Temperature Range:

The EcoSmart Eco 27 Electric Tankless Water Heater features a heated water temperature range of 80F to 140F, which more than suits the needs of most homeowners and campers alike.

  • Twice As Effective and Efficient in Warmer Climates:

The ECO 27 is primed for usage in the Northern United States where underground water temperatures can be as low as 37F in the wintertime, and it’s made to be an economical option for those in that region.

However, in the Southern United States, where underground water temperatures are sometimes twice that of temperatures in the north, the ECO 27 is touted to be twice as economic and efficient, with the capability to produce up to 6 gallons of hot water per minute, as opposed to the 3 gallons per minute in northern climes.

  • Lightweight And Portable:

The ECO 27’s dimensions are 17″ x 17″ x 3.75″ and it weighs a featherlight 13.75lbs, meaning most will be able to transport it single-handedly; additionally, its lightweight makes it a great option for families that move a lot or campers.

  • Electricity-Powered:

The ECO 27 gets its name from the 27kW, 240V power requirement it has. While electricity-powered options aren’t ideal for off-grid living, the electricity-powered ECO 27 makes a lot of sense for use in homes with electricity, because there’s no need for a cumbersome propane tank.

  • Digital Temperature Controls:

The ECO 27’s temperature controls are digitally displayed. Temperature can be set in increments of 1 degree Fahrenheit for ultimate customization.

PROS

  • Lifetime warranty
  • Sleek, modern appearance
  • Touted for the ability to save up to 50% on energy costs
  • Perfect for homes or for campsites that have electricity
  • Digital temperature controls set to 1 degree Fahrenheit increments
  • Copper and stainless-steel components
  • Components are easy to replace
  • Compact and lightweight at 13.75lbs
  • Double efficiency in warmer climates.

CONS

  • This tankless water heater requires electricity, so if you’re off-grid or camping at a rural campsite with no access to electricity, this isn’t an option.
  • That said, its electricity requirements won’t be a problem if your campsite has electricity, providing you meet the 27kW, 240V requirements.
  • Some in the north have opined it’s not powerful enough to work in the wintertime.
  • That said, if you live outside of the coldest extremes of the Northern US, this won’t really apply to you as the underground water temperature is about twice as warm for the rest of the country.

3. Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater

Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater

Key of Features Stiebel Eltron Tempra 24 Plus Electric Tankless Whole House Water Heater:
  • Cost-Saving:

The Stiebel Eltron Tempra’s efficiency is touted for the ability to save the homeowner anywhere from 15% to 20% energy costs, saving you money on your electricity bill.

  • Easy to Install:

Being electric, the Tempra is easy to install in any home and doesn’t require venting.

  • Compact:

The sleek design and small dimensions (21.5 x 19.5 x 8.8 inches), combined with the vent-free requirement mean it’s easy to install anywhere.

  • Digital Temperature Controls:

The temperature controls are displayed digitally with easy-to-read clarity.

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PROS

  • 3-year limited warranty (if the Tempra is installed by licensed personnel)
  • Compact and lightweight
  • Easy to use
  • Easy to install
  • Cost saving: Saves 15%-20% on energy costs
  • Digital temperature controls and display
  • Certified frustration-fre

CONS

  • People have reported paying $1000 for professional installers due to the difficulty of installation.
  • It should be noted that installing the Tempra yourself negates the 3-year limited warranty by ignoring the essential requirement of the professional and licensed installation.

4. SioGreen IR260 Point of Use Infrared Electric Hot Tankless Water Heater

SioGreen IR260 Point of Use Infrared Electric Hot Tankless Water Heater

Key of Features SioGreen IR260 Point of Use Infrared Electric Hot Tankless Water Heater:
  • Infrared Tankless Water Heater:

The SioGreen IR260’s standout feature is hands down, its use of quartz infrared energy to heat the hot water. Without heater coils, the heated water never comes into contact with metal components.

  • Noncorrosive, no Buildup:

Because metal doesn’t come into contact with the water, there’s no chance of corrosion, and things like limescale and calcium buildup are just not a problem.

Additionally, because there’s no water collecting in the bottom of the tank, you’re unlikely to have any issues with algae or bacteria building up as well.

  • Energy-Efficient:

The IR260 only heats water when there is an immediate demand for it.

It doesn’t store hot water, so the only energy expended is energy on hot water you actually end up using, making it a very energy-efficient option.

  • Ultracompact:

At just 5lbs, the SioGreen IR260 is one of the smallest tankless water heaters on the market.

PROS

  • Energy-efficient and cost-saving: Only heats water on demand
  • Quartz infrared energy-powered—metal doesn’t touch water
  • Noncorrosive
  • Buildup-resistant
  • Ultracompact
  • Certified frustration-fre.

CONS

  • The manufacturer explicitly states that the IR260 shouldn’t be used with showers, and that it’s intended for sinks and outdoor faucets.
  • Furthermore, they state they aren’t responsible for efficiency when the incoming water is below 72F.

5. Westinghouse Residential High-Efficiency Electric Water Heater 52 gallons

Westinghouse Residential High-Efficiency Electric Water Heater 52 gallons

Key Features Westinghouse Residential High Efficiency Electric Water Heater 52 Gallons:
  • Stainless Steel Tank:

The laser-welded 316L water heater tank is made from stainless steel, which is resistant to corrosion.

Because you don’t have to worry about rust, you don’t have to worry about tank failure as a result of that.

Plus, the stainless-steel tank is designed to be durable enough for a lifetime’s worth of use.

  • Fast Recovery:

One of the features that make the Westinghouse offering practical for residential use is its fast recovery time.

At 90 degrees Fahrenheit, recovery is 20GPH.

  • Efficiency:

Designed with energy efficiency in mind, the Westinghouse 52-gallon Residential High-Efficiency Electric Water heater boasts a thermal efficiency of 98% with only 0.57% standby loss per hour.

These energy-efficient traits ensure you save money on your utility bills.

  • Smart Design:

The water heater is designed so that cold water goes to the heating element at the bottom of the tank.

This means that cold water doesn’t get a chance to mix with hot water, which further boosts efficiency as well as the long hot water draw times this model affords.

  • Compact And Robust:

The Westinghouse Residential High-Efficiency Electric Water Heater is a compact tankless water heater option while still offering a respectable 84 gallons of first-hour delivery.

PROS

  • Limited lifetime warranty (if you register online)
  • 4500W
  • 240V
  • Adjustable thermostat with max temperature settings for safety
  • Energy-efficient: 98% thermal efficiency
  • Fast recovery: 20GPH for 90 degrees Fahrenheit
  • Durable construction intended for decades of use
  • Laser-welded tank
  • Stainless steel, the non-corrosive tank doesn’t rust
  • Does NOT require anode rods
  • Easy to set up.

CONS

  • The issue with the Westinghouse Residential High-Efficiency Electrical Water Heater is the heating element, which people complain burns up in as few as 3 to 6 months of use.
  • It’s unclear if this is a design flaw or a problem with user installation or other factors; that said, if you properly register the tank, it does have a lifetime warranty, so it should be replaced or refunded if that issue arises.

6. Rinnai Ultra Series Water Heater

Rinnai Ultra Series Water Heater

This one is a gas water heater from Rinnai jam-packed with all features you ever needed. Coming with a top rating in the market it is the best-selling product.

Unlike other heaters from Rinnai, this one comes with improved efficiency. It supports a concrete model and offers a PVC venting option. 

Made with quality material, it has a smooth metallic finish to compliment interiors. Any water appliance with a silver finish will fit well with this heater.

As for the fuel type, it works on natural gas so can get it started in no time. Furthermore, the space-saving design makes it ideal for indoors.

Then the 199,000 BTUs make it a great option for commercial uses. In fact, the design also has low NOx emissions to keep you safe from hazardous gases.

PROS

  • 0.92-0.96 energy factor
  • PVC venting
  • Durable.

CONS

  • Lesser capacity.

7. Eccotemp i12-NG Tankless Water Heater

Eccotemp i12-NG Tankless Water Heater

Here is another stunning tankless gas water heater with such an affordable price.

For people who want to install a single gas water heater for their homes.

Well, finally you can be at peace as this product fulfill all the basic requirements.

From quirky design to sturdy manufacturing, you name it Eccotemp has it.

It comes with a 3 GPM rating, ample flow rate to suffice your house needs. It activates only when needed and you won’t even need any pilot light.

These features put a positive impact by reducing overall energy consumption. Coming with black tempered glass the front panel even supports an LED.

Thus display controls make it further facile to use the hearer.

Moreover, the heater has automatic temp controls as well as an energy-saving mode.

In fact, you can rest assured about the safety concerns with its child lock technology.

Then comes the safe ignition system to further boost usability. This ignition system works by a simple plugin with UL-listed cors in 110v outlet. 

Apart from that this heater has horizontal venting for convenience.

The standard 1/2″ NPT water fittings are also used in this gas water heater to make usage easier.

PROS

  • Safe to use
  • Affordable
  • Tempered glass panel.

CONS

  • Complex installation.

8. GASLAND Gas Water Heater

GASLAND Gas Water Heater

Next on the list is a tankless gas water heater from the Gasland store.

This one is also a top-selling product in the market with quality functionalities. 

It is especially lighter in weight with a compact design to save you some space.

In fact, it also serves the best as a portable, tankless heater for traveling.

If you are out for a picnic, camping, hiking, fishing, etc this heater can save the day.

The mountain bracket makes it easier to hang the heater anywhere.

Are you worried about the installation process? Well, now that problem is also solved.

This heater requires a few minutes for installation via instructions.

Coming with a steady power output of 41,000 BTUs, it can be also used for commercial purposes.

Hence you can enjoy endless streaming water anytime, anywhere.

Even the water flow, as well as heat flow, are adjustable fully for ease of usage. To cut down the gas consumption there is advanced combustion tech installed.

Despite the small size, it can save at least 11.5% of energy thanks to the unique technology.

PROS

  • CSA safety approved
  • Lightweight
  • Portable and cheap.

CONS

  • Issues with flow rate.
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9. Camplux Tankless Water Heater

Camplux 12L 3.18 GPM Indoor Tank

Moving on to the next product on the list we have a trendy option for you. If you want to opt for a heater that fits well with the aesthetics of your home. Well, you are in the right place as we have the best of all.

The quirky design supports a black glassy front panel with an LED display.

So you can keep an easy control over temperature settings within seconds.

In fact, it also allows you to switch between Celsius and Fahrenheit as your need.

The compact size saves you enough space yet provides hot water in minutes.

Coming with a 0.8 to 4.8 GPM water capacity range, it is highly efficient.

This here is a 3.18 GPM tankless gas heater with an unlimited supply of hot water.

Within a minute it can deliver 3.18 gallons of hot water. So even 2-3 persons can take a comfy bath at a time. Apart from that, the heater serves various other functions.

To ensure the safety of users, it has overheating and anti-freezing protection.

Also, it supports dry combustion, flame failure devices to keep you protected.

The child lock technology is the cherry on the top.

Due to a small yet efficient design, it saves a lot more energy. Moreover, there is no hustle involved in the installation.

PROS

  • Convenient 
  • Anti-rustic
  • Safe to use.

CONS

  • Expensive.

10. Rinnai RL75IP Water Heater

Rinnai RL75IP Water Heater

Last but not least we have another Rinnai tankless water heater. If you actually want to enjoy an endless hot water supply. Nothing else can be a better choice than this one.

From its sleek design to stunning functionalities, you name it Rinnai has it. This is a heater with high efficiency and easy indoor installation.

Further, the heater can provide at least 7.5 GPM of flow rates. So you can enjoy hot water in no time. Without having to wait or set schedules, you can get hot water at any time.

And that too with an endless supply.

PROS

  • Energy saver
  • High efficiency 
  • Sustainable.

CONS

  • Over-priced.

How to Choose the Best Tankless Water Heater? – A Buyer’s Guide:Best Tankless Water Heater

Some tankless water heaters are electric and others are battery-powered.

Electrical options have the benefit of being great for home use while battery-powered is ideal for camping or off-grid lifestyles.

Which type you choose should be based on your needs and intended usages.

Another thing to look for when shopping for tankless water heaters is how much hot water they yield.

This varies greatly, so it’s important to check it out because if you intend to use the tankless water heater for showering, whether indirectly as you would use a traditional water heater or directly as an outdoor showering apparatus.

It’s important to know whether there will be enough hot water to meet your needs.

On that note, the temperature range is important. Ideally, a tankless water heater should have a thermostat that you can set so that the temperature range you need is easily achieved and adjustable as your needs vary throughout the year.

This aspect benefits both your utility bill and safety concerns that are common to all water heaters of every type.

Think about durability.

A tankless water heater isn’t worth it’s salt if it’s going to fizzle out on you in a couple of months.

Go for models made out of durable components like stainless steel, which prevents corrosion, a common cause of water heater malfunction in general.

Power Input:

When buying a tank-less heater you need to know about the right size and power. Usually, both these factors are equal so they can fulfill your requirements.

In short, the size must be large enough according to your household. But at the same time, it must be powerful to heat the water. 

To make the right choice you need to keep in mind that power is the key factor.

More power means better results like 10,000 BTUs are ample for small spaces.

Whereas for commercial purposes 1,000,000 BTUs would do the job.

Flow Rate:

Apart from these the power input also plays a role in handling the temperature.

As for the amount of water a heater can deliver is its flow rate. Now, this depends on the number of devices you want to power in. 

For instance, a flow rate of 1 GPM is best for supplying a single faucet.

But you will need a heater with higher water flow to suffice the whole house.

It must be at least gallons per minute to cover up the water appliances.

Venting:

Whether it is tankless or with a tank, the crucial part of any gas water heater is venting.

Every heater omits some hazardous gases that can pose harm. These gases need elimination and proper removal.

Thus a venting system does this all for you. There are usually 2 types of venting options for tankless heaters:

Power venting needs an exhaust pipe to work. If your area has a fresh air circuit then you can opt for this venting.

Direct venting works with an intake pipe and an exhaust pipe.

This pipe removes all the hazardous gases including carbon monoxide. Whereas the intake pipe brings in proper air intake as required.

Energy Factor:

With the help of the energy factor, you can calculate the unit’s energy efficiency.

This lets one learn more about the heater’s average cost of operation. 

Multiply the fuel cost by 41045 and then by 365 to calculate the annual operation cost of water.

Once you get a number, divide it by the unit’s energy factor x 100,000. Often product description comes along with the energy factors.

The Benefits of Buying a Better Tankless Water Heater:561

The obvious benefit to buying a better tankless water heater is that it heats your water.

But without the need for the tanks that are traditionally associated with water heaters. But there’s a bit more to it than that.

Because there is no tank, tankless water heaters are an option for people who don’t have the space for water heaters, for one thing.

Also, tankless water heaters feature many energy-saving technologies that just aren’t possible for traditional water heaters.

A big reason people opt for tankless water heaters over their traditional counterparts is energy efficiency.

Because of the way traditional water heaters work, they’re just not that efficient.

Tankless water heaters, on the other hand, heat your water only when you need heated water.

Their on-demand functionality ensures that you never have a surplus of hot water you don’t need, running up your bill.

Additionally, because of the way on-demand tankless water heaters work, there may be extra benefits for those living in colder parts of the country.

Which can make the energy efficiency and the cost savings tankless water heaters provide even more worthwhile.

Some tankless water heaters are battery-powered. While most are electric, the battery-powered options are great for campers and people living off-grid who don’t have access to or don’t want to use electricity, meaning hot water is now a possibility for a whole new subset of people who just didn’t have that option before battery-powered tankless water heaters.

And on that note, many of the battery-powered options are also compact and super-portable, because they’re made with camping and outdoor use in mind.

Also for campers in mind, some tankless water heaters have features that allow them to double as an outdoor shower, which is a big benefit you could never have with a traditional water heater.

Tips on How to Choose the Best Tankless Water Heater for Your Needs:

There are a few things to keep in mind to find the best tankless water heater for your needs. Consider the following:

  • Choose a battery-powered or electric tankless water heater based on your needs and intended uses.
  • If you’re going to be camping, or if you live off-grid, consider a model that has a shower feature so your water heater can double directly as an outdoor shower.
  • Look at the specs and ensure the model you’re interested in can yield enough hot water to meet your needs.
  • Look for models with a thermostat and/or temperature controls. This lets you know how hot your heater is running and easily allows you to adjust the temperature for safety or economic reasons.
  • Remember that durability is important or you could end up spending more money than you save.

Frequently Asked Questions:

What is the best tankless water heater on the market?

If you are looking for the best tankless water heater on the market, you should consider all the factors that are mentioned in the buyer’s guide.

A product that fulfills the criteria set in the buyer’s guide section will be considered the best one if you are asking us. 

What makes a product the best one is the type of performance it offers and the features, functionality, dimensions, and price range it comes in. 

However, to help you find the best tankless water heater on the market, we have put together a list of the 10 Best products that are available for purchase in the market actively. 

These products have been chosen after they’ve been made to go through thick and thin and they proved their dominance over the other options in the market by providing too good benchmarks and durable quality.

However, you should confer with your choice to pick the best one for you. 

To conclude, If you are going to be looking for the best tankless water heater reviews, consider the ones that are mentioned in the list.

The reason we insist on considering these options first is that these options qualify fully and consist of all the factors given in the buyers guide section.

What is the downside of a tankless water heater?

Everything in this world that has ever been made or has naturally existed has its set of benefits and cons.

Since we are on the topic of Tankless Water Heater Reviews, The advantages are already mentioned above.

As for the disadvantages, the disadvantages of the tankless water heater reviews are as follows:

High Upfront Costs:

Tankless Water Heaters are by no means, an economical option.

This price is significantly higher than the tank-style heaters. The cost is too expensive, including the installation cost of these tankless water heaters

Need Longer Times to deliver hot waters:

When compared with the other options, tankless water heaters will take a longer time to heat the water than the other options.

It kind of feels like a deal-breaker that you are going to be spending so much money on something just to have longer waiting times. 

Moreover, the supply of hot water feels remains constantly disturbed when it is used with multiple water outlets at the same time.

Moreover, if there is a power outage, the tankless water heaters will stop working as they are reliant on electricity for their functionality.

What brand of water heater is the most reliable?

To name a specific brand for making the best tankless water heater is going to be hard as well as unfair.

This is why when you are looking for the best products in the market, you should consider and rate them on the quality that they are going to be offering, not from the brands they come from.

Related: Best Patio Heater 2021 – Top 10 Reviews and Buyer Guide!

Conclusion!

There are a lot of affordable and efficient tankless water heaters on the market today, but there can only be one winner of the roundup for the best tankless water heater which is the Eccotemp L5 Portable Tankless Water Heater and Outdoor Shower.

The most important reason the Eccotemp L5 wins is its reliability.

And in the rare times that problems do occur, they’re not catastrophic, unlike some of the other models out there.

Additionally, the Eccotemp L5 is also unique in that it doesn’t require electricity.

The ability to use the L5 off-grid is a huge boon to campers and outdoor enthusiasts who need a reliable, robust tankless water heater to suit their electricity-free needs.

Finally, the shower nozzle attachment is a great addition to the Eccotemp’s already great qualities, providing further benefits to those in the great outdoors that simply can’t be beaten by competitors.