50 Tankless Water Heaters Compared & Reviewed (with Ratings) – 2017

A summary of the best tankless water heaters 2017. They come in all shapes, sizes and designs, but only one can go into your home!


tankless water heater reviews

If you’re looking for the best tankless water heater on the market, it can be difficult to know which model really represents “the best.” Which will give you the greatest energy savings? Which will offer the most power at the best price? How can you be sure you’ve found a gem when you stumble on it?As a certified HVAC specialist, I’ve had customers ask me these questions many, many times. The
bad news is that there’s no “one size fits all” tankless water heater that suits everyone. All people have unique needs and priorities, so everyone will define “the best” water heater differently.

The good news is that you have plenty of options, and I’m here to help you make your choice with 50 tankless water heater reviews.

Before we get into it,here is a quick comparison table of the top rated tankless models.

ImageProductFuel TypePower/
Flow Rate
WINNEREcosmart ECO 27Electric27 KW $$$4.85/5Check Price
RUNNER UPStiebel Eltron Tempra 24 PlusElectric24 KW$$$$4.9/5Check Price
Takagi T-KJr2-IN-LP reviewTakagi T-KJr2-IN-LPLiquid Propane6.6 GPM$$$$4.7/5Check Price
Ecotemp L5 reviewEccotemp L5Liquid Propane1.4 GPM$4.8/5Check Price
best rated tankless water heaterStiebel Eltron Tempra 29 PlusElectric29 KW$$$$4.7/5Check Price
rinnai best natural gas tankless heaterRinnai RL75iNNatural Gas7.5 GPM$$$$4.7/5Check Price
best natural gas tankless water heaterTakagi T-KJr2-IN-NGNatural Gas,Indoor6.6 GPM$$$4.7/5Check Price
best cheap tankless water heaterRheem RTE 13Electric4 GPM $$4.5/5Check Price
Ecosmart ECO 27 Electric Tankless Water HeaterEcosmart ECO 36Electric36 KW$$$$4.3/5Check Price
eco 18EcoSmart ECO 18Electric18 KW$$$4.5/5Check Price
eco 11Ecosmart ECO 11Electric13 KW$$4.5/5Check Price
rheem rtg 64XLP reviewRTG-64XLNNatural Gas,Low NOx6.4 GPM$$$$4.4/5Check Price
Rheem RTG-84DVLN reviewRheem RTG-84DVLNNatural Gas,Low NOx,Direct Vent8.4 GPM$$$$4.3/5Check Price
best cheap tankless water heaterRheem RTE 9Electric3 GPM$$4.3/5Check Price

 Ecosmart Tankless Water Heater Reviews

1. EcoSmart ECO 27 Electric

The best tankless water heater for the money.

EcoSmart is a brand that I never hesitate to recommend to my customers, so you should know right off the bat that this is a good manufacturer with products you can depend on. What I really enjoy about Ecosmart, however, can be summed up in a single model: the ECO 27.

Small and compact, the ECO 27 can be installed absolutely anywhere in your home, including under sinks and inside closets. It’s an electric unit, so there’s no need to worry about fumes or flames. It’s a small but powerful water heating system that can deliver between 3-6 GPM depending on where you live and how many bathrooms you have.

The ECO 27 is also the cream of the crop in terms of features. Not only can you control the temperature in single degree increments, but you can also switch between Fahrenheit and Celsius displays and modulate your unit with a convenient remote control.

To top it all off, the ECO 27 is a great value for the money. It isn’t the absolute cheapest, but it’s far from the most expensive, either. You can rest assured you’re making a good investment when you buy this brand.

But you don’t have to take my word for it: If you’re interested in the ECO 27, check it out on Amazon and see its features for yourself.


2. Ecosmart ECO 36

A small unit belies the power within.

The ECO 36 is much like others in the ECO line; it delivers high flow rates, high energy savings and high purchase satisfaction from those who order it.

In fact, the only part of the ECO 36 that isn’t high is its low, low measurements. It clocks in at just 17 x 19 x 3.8 inches and 17 pounds, making it one of the smallest electric tankless water heaters that still delivers such impressive power. Ecosmart estimates that it’s 90 percent smaller than others in its range.

What does this small size mean for you? For one, you can install it anywhere, even inside a storage closet that you never use anymore. The ECO 36 is fully electric and doesn’t require vents to function.

It also means that you won’t find anything else like it on Amazon. Go on, check it out. I dare you to unearth another unit with the same kind of specs.


3. EcoSmart ECO 11

Self-modulating technology translates into great energy savings.

If you’re looking for a unit that will save you a ton of money on your energy bill, the ECO 11 is one of the best tankless water heaters 2017. It can reduce your energy consumption by up to 60 percent!

The secret lies in the ECO 11’s self-modulating technology. You see, many heating units simply shove a handful of power at the source without caring if it’s too much. Their manufacturers are so concerned about meeting minimum power demands that they’d rather have too much and waste it rather than run the risk of not having enough.

With the ECO 11, however, you’ll enjoy self-modulating power that never uses too much or too little. Like Goldilocks, the amount will always be just right. Not only does this translate into a more intuitive, convenient water heating system, but it’s also extremely energy-saving since no power is going to waste.

It’s amazing technology to behold, and it’s definitely worth a trip to Amazon to look at it. Let the ECO 11 be your new solution to greener living.


4. EcoSmart ECO 18

A steady, dependable unit with a lifetime warranty.

The great thing about tankless water heaters is that they last twice as long as traditional water tanks. When properly maintained, you’ll enjoy anywhere from 10-20 years with them.But what if you want even greater assurances? What if you want coverage that’s guaranteed for a lifetime?

The ECO 18 is an electric tankless water heater that comes with a lifetime warranty. In addition to offering all the usual perks of an EcoSmart system, including indoor installation, self-modulating technology and precision temperature control, the ECO 18 will give you guaranteed coverage for the entire time you reside in your home.

Now that’s something worth checking out on Amazon, right?


Rheem Tankless Water Heater Reviews

5. Rheem RTE 13 Electric

Perfect for small homes and moderate temperatures.


Sometimes you don’t need a workhorse unit. Sometimes you just can’t afford to drop thousands of dollars on tankless water heaters!

In cases like these, turn to the RTE 13.The RTE 13 is a tiny electric unit that goes wonderfully with small spaces like apartments and cabins.

It delivers 4 GPM at 240 volts, enough to service several showers and sinks at once, so you’ll never have to worry about running out of hot water while running multiple appliances.

The best part of the RTE 13 is its price. You’ll pay so little for this unit that it’ll almost feel like a crime!

The biggest weakness of the RTE 13 is that it isn’t suited for larger homes or extreme temperatures.

It offers 4 GPM in ideal conditions, but that number can fall to as low as 2 GPM if you live somewhere extremely frigid or are trying to service multiple bathrooms at once.

That said, the RTE 13 is perfect for individuals, couples and small families, so don’t hesitate to explore its Amazon page.


6. Rheem RTE 9

A great unit for newbies.

If you’re intrigued by the thought of using a tankless water heater but unsure if you can handle all the bells and whistles of the switch, I have just the product for you.

The RTE 9 is an affordable and easy-to-use electric unit that doesn’t require a degree to install. It can be done right at home with a screwdriver and an instruction manual, and Rheem technicians are also available through a 24/7 hot line if you need to ask questions or seek advice.

As for power, you might be slightly underwhelmed with just 2-3 GPM, but keep in mind that the RTE 9 is what’s known as a “point of use” unit.

If it doesn’t meet your hot water requirements, you can simply install another unit at another sink for twice the power.

I should also mention the incredibly simple interface that makes it easy for even complete newbies to understand what’s going on within the unit.

It has a temperature dial, clearly marked controls and LED lights to indicate activity. It doesn’t get much more beginner-friendly than that.

If you’re ready to make the switch but not sure how, check out the RTE 9 on Amazon.


7. Rheem RTG-64XLN

Part of an outdoor line that delivers on all fronts.

There’s very little that the RTG-64XLN can’t provide. Are you looking for a good flow rate?

The RTG-64XLN offers 6.4 GPM at a 35-degree rise. Do you want something with extras already included in the box?

Try the RTG-64XLN with its thermostat wire and remote control included with every order.About the only thing that the RTG-64XLN can’t do is function indoors, which is why it’s part of Rheem’s outdoor-only line.

But don’t let such a small limitation make you think that this isn’t a unit worth buying. It’s another natural gas tankless water heater that utilizes an internal low-NOx condensing system, so even though it doesn’t break down the fumes enough for indoor use, it still attacks them with vigor worth applauding.

All in all, I’d say the RTG-64XLN is one of the better outdoor models on the market.

But again, you don’t have to blindly believe what I’m telling you. The product is up on Amazon right now if you want to wander over and have a look for yourself.


8. Rheem RTG-64XLP

Save money and energy with the RTG-64XLP.


Energy efficiency is a big deal when it comes to tankless water heaters. They’re better than water tanks by their very nature, and competition can be fierce between brands that are all trying to vie for the title of “most green.”Rheem doesn’t indulge in that game. While they can and do offer tankless water heaters with excellent energy ratings, they’re most concerned about saving you money, not cutting down on functions and features until the water heater is a hollowed-out shell that they can boast as “energy efficient.”

That’s why I like the RTG-64XLP so much. It offers a low-NOx system, yes, but it does it while providing 6.4 GPM and self-modulating technology. It doesn’t prioritize a selling point over genuine power. It takes all the BTUs it requires and turns them into energy for you and your family.

That’s why I recommend the RTG-64XLP to all my customers, and that’s why you should give it a look on Amazon, too.


9. Rheem RTGH-95DVLN


Incredible power that can still be installed indoors.

The RTGH-95DVLN offers a whopping 9.5 GPM, and that usually means you’re looking at a complicated venting system with lots of bells and whistles to compensate for so much power. With the RTGH-95DVLN, however, you’ll enjoy a special low-NOx condensing system that takes care of the worst of the fumes before they even reach the air slits, and that in turn means that the RTGH-95DVLN can be installed indoors.

Yes, you read that right. Despite being a powerful, whole-house unit, this model can still be put inside. It’s an amazing breakthrough in tankless water heater technology and definitely one you should explore on Amazon.


10. Rheem RTGH-95DVLP


A propane version of all the benefits listed above.

If you’re intrigued by the RTGH-95DVLN but looking for a propane unit instead of a natural gas one, this is the water heater for you. It still offers a staggering 9.5 GPM and 94 percent energy factor, but it’s completely methane-free!

Another thing to note about the RTGH-95DVLP is that it comes with PVC pipes right in the box. Rheem really wants to make installation easy for you, so not only do they eschew complex venting systems thanks to their condensing processes, but they even give you parts for free. It’s definitely worth checking out on Amazon.


11. Rheem RTG-84DVLN


Easy indoor installation makes this unit one of the best.

Do you remember when I said that Rheem wants to make installation easy for its customers?

They’ve done it again with the RTG-84DVLN, this time including remote controls and thermostat wires with every order.

Not only will you receive all the benefits of the tankless water heater itself, but you’ll also be given a hand up when it comes to getting it situated within your home.

Yes, I said within your home. The RTG-84DVLN is another indoor unit despite it being powered by natural gas, and you can once again thank Rheem’s internal condensing system for breaking down harmful fumes before they even reach the air.

Check out the RTG-84DVLN on Amazon. You won’t be disappointed.


12. Rheem EcoSense On Demand

No flow delay means no hesitation in buying.

The EcoSense On Demand lives up to its name by providing instantaneous hot water whenever and wherever you want it. The one drawback is that its flow capacity caps off at 2.4 GPM, but on the flip side, its low flow rate also translates into a lack of flow delays. If you hate waiting around and shifting from foot to foot while your tankless water heater kicks in, put the EcoSense On Demand in your Amazon shopping cart and say goodbye to waiting for good.


Takagi Tankless Water Heater Reviews & Best Picks

13. Takagi T-KJr2-IN-NG Indoor

A powerful unit with excellent specs.

The great thing about the T-KJr2-IN-NG is that it’s powerful and energy-efficient. Some units force you to sacrifice one for the other, but with the T-KJr2-IN-NG, you’ll get hot showers and none of the guilt.

Here are the numbers you need to know about the T-KJr2-IN-NG:

-6.6 GPM
-140,000 BTUs
-0.81 – 0.83 energy factor
-19.4 pounds

As you can see, it offers a nice flow rate without a crazy amount of power required. 140,000 isn’t the lowest amount of BTUs to ever exist, but it’s also far from the highest. An energy factor of 80+ percent is nothing to sneeze at, either!

One thing to note is that the T-KJr2-IN-NG a natural gas unit, and that means venting is required to keep the fumes from building up inside your home. While it’s no more dangerous than the pilot light on your stove, venting systems do require time and money to install, and that might be something to think about before you swipe your credit card.

Anyway, take a look at the T-KJr2-IN-NG on Amazon. It’s a solid unit with good specs that’s worth considering if nothing else.


14. Takagi T-KJr2-IN-LP

Another product from Takagi that’s worth the expense.

The T-KJr2-IN-LP is the propane version of the T-KJr2-IN-NG that I’ve already talked about above. Since the specs are exactly the same, I won’t waste your time repeating them. Instead, I’ll talk about something I only briefly touched on before: Takagi’s affordability.There are a lot of factors that go into putting a price on tankless water heaters. What’s their flow rate? When and how do they respond to water pressure? How much will they save the customer in energy?

It’s also important to consider other expenses besides the listed price. For example, you might need to pay for shipping, assembly or insurance. You might need to reimburse a technician for installation. You might need to buy new tools if you’re DIYing installation yourself.

What do all these costs mean for you? It means you should pay attention when a brand is dedicated to low prices.

In all my years as a HVAC technician, I’ve only seen a few brands as committed to value as Takagi. The T-KJr2-IN-LP in particular should be several hundred dollars more than it is, but Takagi prices it low enough that people from all income brackets can buy and experience it.

That’s worth a look on Amazon, I think. That’s deserving of just a little of your time.


15. Takagi T-KJr2-OS-NG Outdoor

Because installation should only be a part of your purchase consideration.

The T-KJr2-OS-NG has to be installed outdoors, so that’s one drawback I’m going to tell you about right away. It isn’t for people with tight space requirements or those looking for a strictly indoor unit.

That said, the T-KJr2-OS-NG offers more than enough pros to balance out the cons. For example, it comes with internal freeze protection so the cold outside won’t affect its performance. It’s also capable of delivering up to 6.6 GPM while requiring just 140,000 BTUs.

If you’re looking for an indoor unit, the T-KJr2-OS-NG isn’t for you. If you can afford a little more flexibility, however, take a look at what the T-KJr2-OS-NG has to offer on Amazon.


16. Takagi T-D2-IN-NG Indoor

Features as far as the eye can see.

This natural gas unit is one of the best. For one, its flow rate is a whopping 10 GPM, and customers only report flow delays as small as ~5 seconds. It can also be installed indoors as long as you set up a proper stainless steel venting system.

Where the T-D2-IN-NG really excels, however, is its list of features. Buy this unit and you’ll enjoy:

-Energy Star certification
-Inlet and outlet thermistors
-Remote controls included with purchase

Long story short, it’s definitely a tankless water heater that you’ll want to admire on Amazon.


17. Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor

With great power comes great responsibility.

At 10 GPM, the T-H3-DV-N isn’t playing around. It’s meant for homeowners who have serious hot water needs or live in extremely cold climates where their heating units have to work double time just to function.

But don’t think that the T-H3-DV-N has forgotten about safety in the pursuit of bigger and better highs. This is actually a model that I recommend quite often to parents with small children because of all the built-in safety features you can find when you pry open the door and look inside. For example, the T-H3-DV-N has computerized shut-off settings that automatically detect when the unit has been operating too much or too long. It also comes with a special low-NOx system to reduce harmful emissions in the air.

The 10 GPM shouldn’t be glossed over, either. That’s a higher flow rate than several other tankless water heaters on this list combined. It does require a rather large amount of BTUs, but that’s the price you pay for such an excellent flow capacity.

Speaking very generally, the T-H3-DV-N has a lot of pros and very few cons.

If you’re looking for safety, the T-H3-DV-N has it. If you’re looking for power, the T-H3-DV-N has that, too.It’s a great overall product and definitely one that you should peruse on Amazon.


18. Takagi TH3DV TH3 Series 199000 BTU Direct Vent Indoor Whole House


Whole-house power with none of the drawbacks.

If you’re in the market for a whole-house unit, you’ve probably noticed that many of them have cumbersome installations that require extensive venting or access to fresh air. But what if I told you that the TH3DV isn’t like that?

What if I told you that it offers 10 GPM, an entirely self-diagnostic computer system and indoor installation?

If you’re reading this and saying no way, I invite you to check out the product on Amazon. Just be prepared for the shock of your life when you realise that everything I’ve said is true.


Rinnai Tankless Water Heater Reviews & Best Picks

19. Rinnai RL75iN

When you’re tired of lukewarm water, the RL75iN is the unit for you.

The RL75iN doesn’t play around when it comes to water temperature. While the residential settings are capped at 140°F, the commercial settings go all the way up to 160°F. That’s enough for even the toughest of dish or laundry stains.

Another selling point of the RL75iN is its controls. Temperature and pressure can be adjusted both on the unit itself and through the use of a Rinnai remote control, and the remote control also comes with easy-to-use buttons and Error Code Indicators. You won’t have to worry about your spouse messing up the controls of this tankless water heater. The remote control will let them know when they’re doing something they shouldn’t be doing.

What else does the RL75iN have going for it? How about its flow rate of 7.5 GPM or its energy factor of 82 percent? Those are pretty great numbers. They’re designed to meet the needs of homes and offices, after all.

Broadly speaking, the RL75iN is a great water heater for people who aren’t afraid of power. Between its big temperature ranges and its high flow capacity, it’s a unit that will get the job done every time.

Take a look at the Amazon page to check it yourself !


20. Rinnai RL94iN

Impressive specs for an impressive water heater.

9.4 GPM is a flow rate that’s more than enough for modern homeowners.

In fact, I’d go as far as to say that it’s unnecessarily large unless you’re doing industrial-sized laundry or running a half-dozen showers at once.

But maybe you do have a large family. Or maybe you just like having the peace of mind that comes with a unit more than capable of meeting all your hot water demands.

Either way, the RL94iN will deliver great power on every criteria used to make a water heater purchase.

9.4 GPM? Check.

84 percent energy factor? Check.

Temperatures ranging from 98°F – 185°F? Check.

All in all, you’ll definitely want to take a closer look at the RL94iN on Amazon. While it isn’t a flawless unit, it offers so many benefits that they practically smother the drawbacks.


21. Rinnai V65EN

Lightweight and ready to go.

rinnai v65 review

It may be a whole-house, natural gas tankless water heater, but the V65EN doesn’t let bulk slow it down. It’s a remarkably lightweight unit that can be installed anywhere outdoors or with a direct vent to fresh air, and at just 13.8 x 6.8 x 20.9 inches, it’s entirely possible to pass it and not know it’s there.

You’ll be surprised by how quickly it becomes part of the scenery.

But what about its power? you may be asking. The V65EN offers 6.6 GM and can require up to 150,000 BTUs to operate. It has an energy factor of 82 percent.

It comes pre-set at 120°F, but if you allow a Rinnai technician to complete the installation, they can tweak it to 140°F.

All of this translates into a fantastic whole-house unit that’s more than worth the price.

It may cost you a little more upfront than other units, but you should take it as an investment for the future. Where else can you find such a compact yet powerful water heating system?

When other tankless water heaters are bearing down under their heft, the V65EN remains a light and breezy option for warming up your taps.

Give it a look on Amazon and see if you agree with my assessment.


22. Rinnai V65EP

A safety-conscious model that will keep moms and dads happy.

To be completely honest, the V65EP has middle-of-the-road statistics; it offers 6.6 GPM and requires 150,000 BTUs, and these numbers aren’t particularly low or high. They’re right in the middle of what you can expect from propane tankless water heaters.

That said, what the V65EP excels in is safety. In addition to complying with all air quality management standards, it also offers enhanced protection around the unit itself, so you’ll never have to worry about the box getting damaged without your knowledge. If anything happens, it’ll alert you to the problem.

Now that’s worth checking out on Amazon, right?


23.Rinnai RU98IN


When only the highest flow rates will do.

The RU98IN is a true marvel of water heating technology. Its flow rate is 9.8 GPM, one of the highest on the market, but it also utilises Rinnai’s great low-NOx condensing system, so you’re basically getting the high power of natural gas without any of the drawbacks of a methane system.

In fact, the only real downside of the RU98IN is that it requires a lot of energy to give a lot of energy; it needs around 199,000 BTUs to function. If you don’t mind that give-and-take, however, you’ll find that the RU98IN is a smart choice for homes and families with high hot water demands. Look at its specs on Amazon to see how impressive it is for yourself.


24. Rinnai RL94eP


When you like it hot.

There are two temperate ranges for the RL94eP:

-In residential settings, you’ll enjoy 98°F – 140°F.
-In commercial settings, you’ll enjoy 98°F – 185°F.

These numbers exceed many others on the market, and that’s why the RL94eP is one of my favorites in these tankless water heater reviews 2017.

Not only does it offer a powerful 9.4 GPM with an 83 percent energy factor, but it’ll also keep you well-supplied with water so hot that it will scorch a hole in your floor if you’re not careful.

Just look at what people are saying about it on Amazon!


25. Rinnai V75IN

Perfect for apartments, condos and mobile homes.

As you may have noticed, not many of these tankless water heater reviews mention mobile homes. That’s because many tankless water heaters aren’t certified to install in “manufactured” (mobile) housing units.

The good news is that the V75IN is here to fulfil that need. Whether you live in a high-rise condo or a small mobile home, it will deliver 7.5 GPM and an energy factor of 82 percent.

Even if you aren’t sure that it’s the water heater for you, it’s worth a quick peek on Amazon.


Stiebel Eltron Tankless Water Heater Reviews

26. Stiebel Eltron Tempra 24 Plus

Temperature controls are only the start of the value.

There’s a lot to love about the Tempra 24 Plus, including a single flow sensor design for easy use and a digital interface where you can monitor the temperature of your water down to the degree. You might also be interested in its 240 V, 24 kW and 150 PSI.What should really capture your attention, however, is its price.

While not the most affordable water heater on the market in terms of raw costs, the Tempra 24 Plus boasts a fantastic return on investment (ROI) in long-term energy savings.

It’s a whole house unit, one of the most energy-demanding varieties of tankless water heaters, and yet it can still save you between 20 and 30 percent on your water bill every month. That’s a crazy savings rate!

It also comes with an extended warranty that will keep you protected even in the face of defects and damage. This is a one-two punch for both ownership convenience and long-time value. Think of all the money you’ll save when you don’t have to repair or replace your malfunctioning unit because you’re covered by the warranty.

Check out the Tempra 24 Plus on Amazon if you’re ready to experience a tankless water heater that prioritizes value just as much as power. Not all of them do, so it’s important to latch on when you find one that does.


27. Stiebel Eltron Tempra 29 Plus

An electric unit that can be installed anywhere.

As an electric unit, the Tempra 29 Plus doesn’t require any external venting or condensing systems. You can just hang it on a wall or store it under a sink and let it work its magic. It’s only 17 pounds, so it isn’t a heavy or cumbersome load.

Another excellent aspect of the Tempra 29 Plus is the way it allows for personal customization and control. The digital interface lets you know exactly how hot your water is, and if you aren’t pleased with that number, you can change it through a number of dials, buttons and settings. The unit itself is even color-coded with a temperature wheel where “hand washing” settings are blue and “scalding” settings are red!

How hot is scalding, you may ask? The maximum temperature of the Tempra 29 Plus is 125°F, more than enough to unknot your muscles after a long day. You can also lower it all the way down to 86°F if your tastes run to the opposite end of the spectrum.

All in all, the Tempra 29 Plus is an excellent unit that has a lot going for it, and I encourage everyone to check it out on Amazon.


28. Stiebel Eltron Tempra 12 Plus

Save on your electric bill with this energy-efficient unit.

The Tempra 12 Plus is a great unit if you’re worried about your energy consumption at home. Not only will it reduce waste and help you live more greenly, but it’ll also save you anywhere from 10-20 percent on your energy bill. That can translate into hundreds of dollars per year! Check out the Tempra 12 Plus on Amazon and start calculating how much you can save.


29. Stiebel Eltron Mini 3 Electric

One of the smallest units on the market is also one of the most affordable.

If you’re looking for value, it doesn’t get much better than the Mini 3 Electric. It weighs less than four pounds yet still delivers instant hot water at 115 volts. It also offers immense energy savings of up to 60 percent.

As you can probably imagine, it’s too small to function as a whole-house unit, but one of the benefits of its tiny size is that it can be installed in plain sight at every sink where you need hot water. In fact, it’s so light and unobtrusive that some customers report their guests mistaking it for hanging art! Give it a click on Amazon and read the reports yourself.


Ecotemp Tankless Water Heater Reviews & Best Picks

30. Eccotemp L10 Portable Outdoor Heater

For camping, vacationing and living off the grid.

We’ve talked a lot about tankless water heaters that can be installed indoors, but what if your hot water needs don’t come with four walls and a roof? You’ll need an outdoor system, and more importantly, you’ll want something light and portable that you can carry to various outdoor locations.Enter the L10.

At just 6.5 x 13.5 x 28 inches and 24 pounds, it can be toted anywhere you need it to go, including cabins, cottages and camping grounds. Take it on vacation with you; leave it at your new construction site; use it at professional outposts deep in the desert or the arctic. The L10 is designed as an all-purpose unit that will move where you move.

It also comes with several assembly parts already included in the box for even greater convenience. Don’t worry about gas regulators, rain caps and garden hose adapters; Eccotemp includes them with every purchase.

All in all, the L10 is a great portable unit for outdoor use. Between its light weight and already-included parts, it’s an absolute steal available on Amazon.


31. Eccotemp L5 Portable Tankless Water Heater

A portable water heater that also doubles as a shower.

The first propane unit on this list is also one of the most appealing. While it only offers 1.4 GPM, a number significantly lower than other propane tankless water heaters, it more than makes up for its lack of power by providing nearly unparalleled convenience.For one, it’s a fully portable outdoor unit, so you can take it anywhere you please.

Hook it up to your log cabin in the woods; mount it to an exterior wall on your home; you can even hang it off a tree in your backyard. It’s designed for your convenience above all else.

Speaking of convenience, the L5 comes with a shower head attachment that will enable you to take luxuriously hot showers even in the middle of nowhere. As long as you have a water supply, an electrical connection and the L5, you can get clean no matter how rustic you’re living.

Check out the L5 on Amazon to see if it’s something that matches your portable tankless water heater needs. If you aren’t surprised by its low price, I’ll eat my hat!


32. Eccotemp FVI-12-NG High Capacity Gas

Independent controls make the FVI-12-NG a cut above the rest.


Controls are what set some units apart from others in these tankless water heater reviews. If you can’t control what your unit is doing, what’s the point of having it in the first place?

That’s why the FVI-12-NG is such a good choice for those who want power and precision in their water heating systems. Not only will it give you 2-4 GPM depending on how many bathrooms you have and how much hot water you’re using at one time, but the FVI-12-NG also comes with fully independent dials for gas and water. You can change one, both or neither at all. It’s a very customizable system that allows every individual have their own preferences and settings.

So that’s why I love the FVI-12-NG, and that’s why I think it’s different from so many tankless water heaters on the market. It doesn’t force you to conform to its standards.

It puts you in the driver’s seat and lets you call all the shots. That’s why I recommend the FVI-12-NG and why I think you should also look at it on Amazon yourself.


33. Eccotemp FVI-12-LP High Capacity Propane

This unit has almost the exact same specs as the one above, and it’s the same brand and model too. The difference is that it runs on propane instead of methane (natural gas). While you won’t really notice any changes in terms of how it operates, it might be a switch worth considering if you care deeply about emissions or eco-friendly living.

What else is there to say about the FVI-12-LP? It still offers 2-4 GPM. It requires 74,500 BTUs to operate. It’s only 20 pounds, and it can be installed anywhere there’s venting to outside air.

The controls are the same as well, and if you’re still in disbelief that a tankless water heater can provide that much precision, I encourage you once again to check it out on Amazon. I’m not making these specs up!


34. Eccotemp 45HI-LP Indoor Liquid Propane

Impressive specs make for an impressive heating unit.

At 15 x 5 x 24 inches and 38 pounds, the 45HI-LP is one of the largest indoor models that Eccotemp has to offer. The good news is that it’s still light enough to install anywhere, including attics and basements, and it also comes with a nice flow rate of 6.8 GPM. You shouldn’t have any problem owning or operating the 45HI-L. The customers on Amazon aren’t complaining, either.


35. Eccotemp 45H-NG Outdoor

A unit so good that it can make you change your mind about indoor installation.

The 45H-NG needs to be installed outdoors, so that’s a strike against it right away if you’re looking for indoor units. On the other hand, it offers 6.8 GPM with a 110 volt power supply, so maybe it’s a unit worth considering even if you were only thinking about indoor installations.

Eccotemp is a brand you can trust no matter which model you wind up buying, so the choice isn’t as fraught as it could be. Check it out on Amazon and decide for yourself if the 45H-NG is worth a change of preferences.


Bosch Tankless Water Heater Reviews & Best Picks

36. Bosch 330 PN LP Therm

A small unit that packs a big punch.

Weighing in at just 24 pounds, the 330 PN LP Therm is remarkably small for a propane unit, but don’t let its small stature fool you: It’s ready to rock and roll.

First of all, it can serve anywhere from 1-3 bathrooms depending on your location, altitude and weather conditions. That’s more than enough for most homeowners and their daily needs.

Secondly, the 330 PN LP Therm boasts an ignition system that doesn’t require electricity to function. This means you can still heat up a hot shower even during an electrical blackout!

Finally, the 330 PN LP Therm takes just 75,000 BTUs to operate. That’s an extremely attractive number if you’re thinking about energy efficiency and lower utility bills. For comparison’s sake, some tankless water heaters can require up to 199,000 BTUs.

All in all, the 330 PN LP Therm will serve as a worthy addition to any home. It might not be the single most powerful model on the market, but when all factors are taken into consideration, it quickly outshines the competition. Check it out on Amazon and do a little research for your own sake. I’ll be very surprised if you aren’t at least slightly impressed by what you see.


37. Bosch AE115 PowerStar


Hot water without delays.

While only offering 2.6 GPM, the AE115 PowerStar is remarkably efficient when it comes to flow.

Some tankless water heaters can have flow delays of ~15 seconds or more, but the AE115 PowerStar isn’t one of them.

You’ll enjoy steady, uninterrupted hot water for as long as you want it, and while you might only wring one appliance at a time out of its system, you can always install more.

The AE115 PowerStar is a “point of use” unit, meaning that if you aren’t happy with the flow rate between sinks, you can simply install a unit at each one.

It’s something to think about as you browse its Amazon page.


38. Bosch Therm 520 HN NG


A unit that breaks the curve.

There are many kinds of tankless water heaters on the market, but only a few have the distinction of being unique.

The Bosch Therm 520 HN NG accomplishes this through its hydro-power ignition that doesn’t require electricity to work.

That’s right: You can enjoy endless hot water from a whole-house natural gas unit that doesn’t actually require electricity to start.

If that isn’t worth reading more about on Amazon, I don’t know what is.


39. Bosch WH27 Tronic Whole House Electric


Fantastic energy efficiency from a small unit.

Offering all the features you’d expect from Bosch but in an electric unit this time, the WH27 Tronic provides 3.3 GPM at a 55-degree temperature rise.

This isn’t stellar in terms of simultaneous usage, and you should really only expect to use one major appliance at a time with such numbers, but what the WH27 Tronic lacks in power it makes up for with its energy efficiency.

You’ll save anywhere from 5-30 percent on your energy bill when you make the switch to this unit. The exact number will depend on how you use it and what your hot water demands look like at home, but it’s a noteworthy amount of savings all the same.

The WH27 Tronic also boasts an energy factor of 97 percent. If nothing else, that is something that should send you to Amazon for a closer look.


40. Bosch AE125 PowerStar

Power that varies by location.

The performance of the AE125 PowerStar will depend on where you live. If you’re in a cold, snowy climate, it probably won’t be able to heat more than one bathroom at a time, and that may or may not be enough power for you.

On the other hand, if you live in a more moderate climate, the AE125 PowerStar can power 2-3 bathrooms at once and therefore handle all the needs of a modern family.

This one really depends on your location, so you might want to look at it on Amazon before making your final decision.


41. Bosch US7 Tronic 3000

Copper sheaths that improve quality and durability.

As a “point of use” unit, you may need to install several US7 Tronic 3000s around your home to get the same heating efficiency as a whole-house unit.

It delivers slightly less than one GPM (0.9 GPM), and that simply isn’t enough for multiple appliances at once, especially if they’re high-demand appliances like dishwashers and washing machines.

So why am I recommending the US7 Tronic 3000? It’s all about the copper sheaths. The heat exchanger in this unit covers its heating elements with copper sheaths, and that’s an excellent way to increase the longevity of a tankless water heater.

You can order it now from Amazon and it’ll still be around for decades to come!


Noritz Tankless Water Heater Reviews & Best Picks

42. Noritz NRC98-DV-NG

Everything worth buying in a single unit.

I love condensing units. I think I’ve made that clear while completing these tankless water heater reviews 2017. Not only are they safer for families, but they’re also greener and more energy-efficient for the environment as a whole.

So believe me when I say that the NRC98-DV-NG is worth the money for its condensing system alone. Yes, the flow rate (9.8 GPM) and installation (indoor) are excellent selling points as well, but what really makes this unit special is the low-NOx properties that will help you live more sustainably with every washing of your hands.

But if you’re still not sure you can believe me, you can always check out the product on Amazon to see for yourself.


43. Noritz NRC1111-DV-NG

One of the highest flow rates on the market.

Do you need maximum power in a tankless water heater? Are you tired of scrolling past tiny little units with minuscule flow and pressure rates?

The NRC1111-DV-NG offers a staggering 11.1 GPM. Yes, you read that right. It’s a flow capacity that exceeds just about everything else on the market, including other natural gas models and even other Noritz products.

If you’re looking for the ultimate flow rate in tankless water heaters, check out the NRC1111-DV-NG on Amazon.


Navien Tankless Water Heater Reviews & Best Picks

44. Navien NPE-240A Premium Condensing

Double the power, double the convenience.

The NPE-240A doesn’t offer a single heat exchanger. It offers two. That means double the heat, double the flow rate and double the benefit to you.

It also means double the power consumption, but if you’re less worried about BTUs and more worried about GPM, the NPE-240A is a great investment for larger homes and apartments.

It can serve anywhere from 2-4 bathrooms at once depending on how it’s used, so you’ll be able to fill tubs, wash cars and run spin cycles with ease.

Mosey on over to Amazon and have a look at the NPE-240A. You’ll be glad you did.


45. Navien NPE-180A Premium Condensing

Works with you, not against you.

One of the most common complaints about tankless water heaters is that they’re difficult to install. They can require everything from ground lines to circuit breakers to fit into place, and that takes time, effort and money.

The good news is that the NPE-180A bypasses all of that. It uses your existing framework, including your existing ground line, to create a seamless switch from water tanks to tankless water heaters. It’s also field convertible if that’s something you need, too.

Is it worth taking a look on Amazon? You decide.


46. Navien NPE-240-A Tankless Gas

When you need a unit that can get the job done.

While not the lightest or most energy-efficient model on the market, the NPE-240-A is a great choice when you don’t feel like playing around with your hot water. It’s a powerful whole-house unit that will serve multiple bathrooms at once, giving you everything you need to take showers, run dishwashers and do loads of laundry at the same time.

As a bonus, Navien includes both a buffer tank and a re-circulation pump with every order, so keep that in mind as you check out the product on Amazon. You won’t need to buy either of those things to install the NPE-240-A.


47. Navien NP-240 Commercial Condensing

This is not a recommended product

Navien NP-240 Commercial Condensing Tankless Water Heater with Pump and Buffer Tank, Natural Gas

This model,the Navien NP-240 Commercial condensing is reported to be not very worth after paying such a huge price.It has got several complaints from many customers and it has just got a low rating on most of the e-commerce portals.

However,this model may benefit some office workers. The NP-240 is a commercial condensing unit that can be installed indoors even though it’s powered by natural gas; you can thank both its PVC vents and its low-NOx system for the added convenience of being able to set it up inside your office.


P.S . Not a recommended product.You may find it useful in office but not at all in home. 

Marey Power Tankless Water Heater Reviews & Best Picks

48. Marey Power Gas 10L with Digital Panel

An easy-to-use interface makes this unit great for newbies.

The Power Gas 10L comes with a digital LED display so simple that even a child could understand it. That said, a child probably couldn’t parse the intricacies of its flow capacity and pressure ratings, and they probably wouldn’t appreciate the fact that the Power Gas 10L runs on D cell batteries and therefore doesn’t require electricity.

So it’s a good thing you’re the one looking it up on Amazon, right?


49. Marey Power Gas 10L 3.1 GPM Propane Gas

A great value for the money, though a little under-powered on the whole.

The Power Gas 10L can be run with or without electricity, so it would be worth a look even without the low price that makes it so attractive to buyers on Amazon.

It should be noted, however, that it only offers 3.1 GPM, and that’s just enough for a couple of showers and sinks at a time.

You’ll need to be careful not to overdo simultaneous usage when you buy this one.


50. Marey Power Portable Propane

Portability in an affordable package.

The Marey Power Portable Propane can be taken anywhere you desire, and that includes cottages deep in the woods and construction sites in the middle of an urban jungle.

Even more importantly for a portable unit, it comes with a full five-year warranty covering accidents, defects and damage, so you don’t have to worry about gently scraping it and then losing your coverage forever.

If you want a portable unit that will actually stick around for awhile, check out this Marey product on Amazon.



ECOSMART ECO 27 Tankless Water Heater


Power, value and energy efficiency in one convenient package.

It simply doesn’t get better than the ECO 27. Not only is it powerful enough to serve multiple bathrooms at once, but it’s also affordable both in short- and long-term costs.

You should definitely check out the ECO 27 on Amazon and see if it looks like the right tankless water heater for you.


Stiebel Eltron Tempra 24 Plus Tankless Water Heater


A versatile unit that won’t cost you in the long run.

Some tankless water heaters will save you money initially but then turn into cash-guzzlers down the line. With the Tempra 24 Plus, however, you can rest assured that you’ll both get and maintain a good ROI for as long as you’re running the unit. Look up the Tempra 24 Plus on Amazon and see for yourself how much customers love it.


Rheem RTE 13 Electric Tankless Water Heater


Your water heating solution to smaller homes and apartments (4 GPM) and the most affordable model

The RTE 13 is perfect for small homes. With a steady flow rate and admirable energy efficiency, it’ll get the job done for 2-3 bathrooms at a time.

If you don’t want to buy a gigantic tankless water heater when a littler, less demanding unit will do, the RTE 13 should be one of your first stops on Amazon.


Takagi T-KJr2-IN-NG Indoor Natural Gas Tankless Water Heater

The Best Natural gas tankless water heater from Takagi

Here is a model from Takagi, the Takagi -KJr2-IN-NG  that serves all your needs if you are looking for a natural gas tankless water heater .

This is a very long lasting model that you can use upto 10+ years with little maintenance.

Still not convinced ? Take a quick look at its Amazon page.

Rinnai RL75iN Natural Gas Tankless Water Heater

Another Versatile Natural Gas Tankless Water Heater

The RINNAI RL75iN natural gas model is one of the few models that can be converted to propane if you do not like natural gas.

Moreover, this machine is capable of powering several appliances and bathrooms at once and some quality related issues do exist with this model, not always.

It is a good idea to explore more about it on Amazon page.

A Few Final Words

These are just a few of the best tankless water heaters 2017. I’ve put a lot of effort into ranking and reviewing these units, so I hope I’ve helped at least a few people out there make a smart purchase decision.

If you’re still undecided, that’s okay, too. You shouldn’t rush into the purchase of such an important appliance. Just remember that any product receiving less than 3.5 stars on Amazon probably isn’t worth the price.

This concludes my tankless water heater reviews 2017. Good luck! Happy hunting!

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