Best Marey Tankless Water Heater Review

Beginner Info, Tankless Water Heater

marey tankless water heater review
As an Amazon Associate, I may earn from qualifying purchases at no extra cost to you. All the products recommendation links on will navigate to Amazon

Are you on the lookout for an unbiased review of the Marey Tankless Water Heater?

Well, in this post, we would be reviewing some of the best Marey tankless water heaters available on the market, right now.

Furthermore, we would also be throwing light on various aspects of a Marey tankless water heater in order to help you make an informed buying decision.

Lastly, we would be responding to the queries related to Marey tankless review so that most of your doubts related to the brand got cleared before you make a buying decision.

So, without any further ado, let’s begin…

Introduction to Brand Marey

Frankly speaking, on the blog, we’ve reviewed some of the best tankless heater brands including Rinnai, Nortiz, Rheem, SioGreen, etc, and what we found common in all these reviews was that each brand comes with its own sets of pros and cons.

Today, we would be talking nuts and bolts of Marey so that you can not only make logical decisions but also, guide others in the decision-making process.

Marey is a well-established brand founded in the year 1955 by a Puerto Rican entrepreneur ‘Mariano Reyes’.

However, the brand entered the tankless water heater market in late 1995 almost 40 years later of its formation.

Frankly speaking, nowadays, I find many of the products being sourced from the Chinese marketplace and then getting sold in different parts of the world with a brand name.

I didn’t have a good experience with the Chinese products that I tried in the past, and so I refrain from recommending them to my clientele.

I affirm that I do have to recommend a couple of Chinese products in the past but you can count them on your fingertips.

Unfortunately, some of the brands that got created by sourcing Chinese products gets perished, and you get very little time to even think about what went wrong with the brand.

In such a scenario of uncertainty, the brand Marey gives you hope that you’re in safe hands, and nothing will go wrong.

The brand has a reliable sales team that is easily approachable even after a year or so.

Top 3 Marey Tankless Water Heater

Well, though Marey has some really great tankless models to offer still I would be reviewing the top three models which have been tested by our core team as well as have received positive feedback from our clientele.

 Some of the key parameters that were considered during the evaluation process include energy consumption, capacity, ease of installation, lifespan, etc. 

Marey ECO150 Tankless Water Heater

So, here I come with one of my favorite models from the brand Marey.

It’s a mid-range tankless heater that can be used for both home use and small commercial applications.

Moreover, the unit is compact and comes with a newbie-friendly installation process.

On top of it, the unit is equipped with advanced technology to help you experience one of the best user experiences that any tankless heater could provide you.

I’m a big admirer of the LCD display and soft-touch control panel features of this brand.

The outer metal alloy casing has an attractive white matte finish with the LCD display getting prominence in the middle.

It gives you the flexibility to switch the temperature between Fahrenheit and Celsius.

Temperature can be increased and reduced with the help of two buttons.

Not to forget, ECO150 boasts of a patented Nichrome heating element with a stainless steel water channel.

These components have high resistance and prevent corrosion problems as well.

You can expect ECO150 to provide hot water to two of your fixtures simultaneously.

The unit is equipped with a flow switch activation mechanism that ensures that the heater requires very little water pressure to perform without a glitch.

Needless to say, the brand Marey is known for its customer service which is considered one of the best in its class.

One of my clients had done a blunder during the installation process, and you know what, the replacement was done in an epigrammatic span of time after she has contacted the customer service which clearly talks volume about the brand’s reliability.


  • A mid-range tankless heater that will suffice the hot water requirement of your mid-sized home
  • Comes with a white outer metal alloy casing
  • LCD display with soft-touch buttons
  • Patented Nichrome heating element
  • Stainless steel water channel
  • Corrosion-resistant
  • Capable of switching between Celsius and Fahrenheit temperature
  • If needed, the unit is capable of increasing the temperature to up to 140 degrees
  • Superlative customer service


  • The cleaning process needs to be expedited on a regular basis in order to check for the larger sediments that might reduce the efficiency

Marey Gas 10 LPG

The Marey Gas 10 LPG is a gas-powered tankless water heater that is capable of sufficing the hot water requirements of larger homes effortlessly.

As per my knowledge and experience, it is one of the top-rated gas-powered tankless heaters that Marey has on offer.

The unit has an aesthetic look and feels and is designed in such as way that it will sync well with your home decor.

Moreover, the control panel will definitely grab your eyeballs, and every feature is presented in a unique way so that the end-users can have the best possible experience.

The digital display takes the guesswork out of adjusting the settings so, in spite of you being a first-time buyer, you wouldn’t be facing any issue with the operation or control units.

It gives you the flexibility to adjust temperature up to 140 degrees.

The Marey Gas 10L heaters have a 1/2″ gas line so upgrading from a conventional water heater shouldn’t be an issue for you.

The activation water pressure is as low as 10 psi that makes it a preferred choice.

In simple words, the heater will get activated even though you need a trickle of water.

The maximum distance of 50 meters between the point of installation and point-of-use makes it possible for this unit to get installed outside.

Furthermore, the unit can provide a flow rate up to 3.1 GPM, and also comprises a battery-powered automatic ignition.

It comprises rust-proof metallic components and uses patented technology that drastically reduces the wait time.

In order to tackle the safety issues that might occur due to the lapses in the working mechanism, the unit has safety features well in place.

Many of you wouldn’t be aware of the fact that there are integrated safety features for anti-combustion and gas pressure.


  • Tankless heater with a huge capacity to cater to your whole house hot water requirement effortlessly
  • You can either use liquid propane or natural gas as a fuel as per your feasibility
  • Comes with ½” connections that are perfect for homes
  • Minimalistic control panel
  • LCD display for temperature
  • Capable of providing a flow rate up to 3.1 GPM
  • The unit is robustly constructed and also comprises rustproof metallic components
  • Anti-combustion and gas pressure safety features


  • As a first-time buyer, installation might be a time-consuming affair for you

Marey Natural Gas Tankless Water Heater

The last on my list is Marey GA30ONG which could be a great fit if you’re looking for a tankless water heater for a single shower or faucet.

It is compact and easier to install.

In simple words, you can consider Marey GA30ONG as a mini version of the 10L water heater that we reviewed last.

You can adjust the temperature up to 140 degrees.

Irrespective of the compact size, the unit doesn’t compromise on performance and efficiency.

The unit is also equipped with metal alloy casing, the patented heating elements, and also comes with a digital LCD display.

Moreover, as per the feedback from my clients who has been using this model for quite some time now, the water gets heated quickly irrespective of the unit is very small.

The instruction in the manual is simple and easy to interpret.

However, in case, you’re struggling with the instructions which could be the rarest of the rare scenarios, then don’t hesitate in taking help from the YouTube videos where installation of the unit is explained in the best possible way.


  • Small, compact, and sleek designed
  • Metal alloy casing
  • Newbie friendly installation process
  • Digital LCD display
  • Easy control panel
  • Temperature adjustable up to 140 degrees


  • Can’t be a substitute to a whole house tankless water heater

Features of Marey Tankless Water Heater

Let’s have a quick look at some of the important features of the Marey tankless water heaters.

The brand believes in the concept of “walk the talk” which can be clearly depicted from the features that the models come with along with the “genuine” claim that the brand makes to the end-users.

Temperature Specific Models

Depending upon the part of the world you come from, you can choose a Marey tankless model that syncs well with the climatic conditions in your region.

The brand gives you the option of selecting tailor-made tankless models as per your geographical requirement.

Let’s understand it with the help of an example.

The flow rate of a tankless model is greatly influenced by the difference in the incoming supply water temperature and the output temperature.

For example, if you’re a resident of a warmer climate then definitely, the amount of heat that would be required to heat the water to the desired output temperature would be far lesser as compared to you using the same unit in extremely cold climatic conditions.

 So, if you’re opting for a tailor-made heater for a warmer climate, then these heaters can save you up to 60 percent on energy bills as these units are customized for reduced heating power which conserves energy that otherwise you would’ve got wasted in heating the water more than it was required. 

Automatic Temperature Regulation

Unlike the conventional water heaters wherein you need to switch on/off the heating elements, the Marey tankless water heaters are equipped with smart heating features that automatically regulate the temperature.

What actually the Marley tankless model does is, it automatically modulated the amount of energy needed to heat the water to an optimum temperature thereby preventing energy wastage and saving on costs.

On top of it, all the Marley tankless models that we’ve reviewed so far comes with an integrated overheating protection system that will shut the heating element off as soon as the temperature exceeds the preset mark.

Patented Heating Elements

Frankly speaking, Marley has the patented heating element in selected tankless models, and one such model is the ECO series.

What it does is actually uses a patented Nickel-chromium (Nichrome) heating element which is known for its excellent resistance.

As soon as you’ll heat it for the very first time, it will form a protective layer that will keep the inner heating element protected from oxidation.

In layman’s terms, the Nichrome heating element would last significantly longer as compared to other cheaper heating elements.

Durable and Robust Construction

For any product to last for a longer duration, it must be robustly constructed and durable.

It goes without saying that the Marey Tankless water heaters are highly appreciated by the end-users for their high-quality construction.

Right from the outer casing which is made of aluminum-magnesium alloy casting or the aqueduct which is made of durable stainless steel, the heaters are designed to withstand extreme temperatures and elements.

Furthermore, quite a few of the Marey tankless models are also equipped with filtration sediments that play a crucial role in preventing sediments in water from entering the inflow stream and damaging the heating element.

And, as a result, the heating element lasts longer.

On the other hand, there are also Marey models that are equipped with integrated features to prevent any sort of scaling issue.

Well, many of you wouldn’t be aware of the fact that the top models from Marey possess a mindboggling efficiency of 87 percent.

Types of Marey Tankless Heaters

The Marey tankless heaters are mainly divided into two types depending upon the type of fuel that it uses.

You guessed it, RIGHT.

You can opt for the Marey tankless models that are either powered by gas or by electricity.

The Marey tankless gas models are further segregated as propane tankless and natural gas tankless models.

In case, you’re planning to buy a tankless heater that could suffice the off-grid hot water requirement, then definitely, the gas-powered Marey tankless models could be a better option as they are backed by battery-powered automatic ignition systems.

On the other hand, if you’ve less space in your kitchen or you want to free the floor space, then, in that case, an electric tankless model can do wonders for you.

Endless Supply Of Hot Water

The Marey tankless water heater would provide you with an endless supply of hot water ONLY IF sizing is done correctly.

In case, you’re a first-time buyer and want to know more about what size of a tank would be suitable for you, then check my last article on the sizing of a tankless water heater.

Trust me, if you’ve correctly sized your tankless water heater, then no one can stop you from getting a hustle-free endless supply of hot water.

Instant Hot Water

Since the Marey tankless heaters don’t come with a tank so they heat the water only when you need it.

As a result, the standby heat loss to the environment is almost negligible leading to a decrease in electricity bills.

Size Specific

From the mini Marey for small homes to large 16L heaters for extended families, there’s a water heater for every application.

Wrapping Up the Marey Tankless Water Heater Review

First and foremost, I would like to thank you for being with us till the end.

Secondly, I would like to bring to your notice that I along with my core team have put loads and loads of effort into coming up with this idiosyncratic superlative comprehensive guide in order to help you make an informed buying decision.

And, in case, you’ve liked our effort and want to appreciate us, then please feel free to share this piece of information with the like-minded people and the ones who are in need of it.

After all, sharing is caring, isn’t it?

Cutting long-story-short, we hope that Marey tankless water heaters review would help you in making a smart decision.

Needless to say, all the three Marey tankless water heaters that we’ve reviewed are equipped with innovative technology and best-in-class features.

That’s all, as of now :):):)

[Also Read]