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Review: Marey Tankless Water Heater

Water Heater Review

Are you thinking about buying the Marey Tankless Water Heater? The thought of “going tankless” can be a little scary, and as you know the journey to find a great water heater is not always easy. But we’re here to help, so let’s take a close look at this versatile tankless.

In a Hurry?

Marey TanklessIf you’re in a hurry, you can go directly to the product description right here, or you can continue on and read our in-depth review.

Marey Power Gas 10L 3.1 GPM Propane Gas Digital Panel Tankless Water Heater

Overview of the Natural Gas Tankless:

So, what’s all the fuss about this tankless water heater? Simply put, it’s a top-rated, highly effective natural gas tankless water heater that supplies you with an endless flow of hot water in a matter of seconds. In fact, it’s capable of generating 3.1 gallons of hot water per minute!

It is energy efficient and easy to install (thanks to a detailed user guide that’s included). It even features an auto ignition, eliminating the need for a pilot light.

Marey Heater Corp. makes this water heater in both a Propane Gas and Natural Gas model. We’ll be looking at the Natural Gas model today, but, other than the gas source, they are virtually the same.
Here are some of the TOP Benefits:

  • Energy Efficient. The water heater runs on 2D cell batteries. This means that it doesn’t require an electrical connection. NO more electricity bills, and better yet, it only uses gas when the water is flowing.
  • Affordable. The tankless water heater sells at a price below $300, making it a favorite for even the thrifty.
  • Rustproof. No more replacing the anode rod (also known as the sacrificial anode), and no water loss due to leaks.
  • Built to last. With proper care and maintenance this  water heater could last a lifetime, and even more impressively, maintain an 87% performance efficiency level.

Marey NonElectric Tankless Water HeaterSpecial Features and Specifications of the Marey Tankless Water Heater Include:
Compact and Stylish Look
Tankless water heaters by design occupy less space in your house. The approximate dimensions on the Marey tankless are 24”(h) x 14”(w)x 7”(d) . But it’s not only compact, it also has stylish good looks. This water heater will add a great sense of style for a functional appliance with its sleek design and attractive silver color.

Energy Efficient 
One of the top reasons the Marey tankless is enjoying such a high popularity, is its focus on energy efficiency. The system requires 2 D-cell batteries to start the water heating process. Since batteries are used to ignite the burners, the need for a pilot light is eliminated. Gas is used only when the water heater is in use. If you are not using hot water, your Marey Tankless Water Heater is not using any energy what-so-ever!

The entire system only weighs 21 pounds. When installing, Marey recommends mounting the screws directly into studs, however, if studs are not available, it is possible to use expansion screws. Because of it’s lightweight design you are not limited to where you install your water heater.

Quality Design
The product is made from top-quality, eco-friendly materials, giving it’s competitors a run for their money. This tankless water heater is designed to last a lifetime with regular use, and even better, it’s designed to perform at a high level to meet your needs.

Environmental Friendly
Throughout the water heating process, no harmful chemicals are used. This ensures that the hot water output from the system is completely safe for consumption.
The advanced technology saves both water and energy. Saving you money and positively impacting the environment.

Easy to Install and OperateMarey Natural Gas Tankless

The included user manual will guide you throughout the installation process, although we highly recommend having it professionally installed.

Here are the installation steps:

  1. Mount the Marey Tankless on the wall
  2. Connect the vent pipe (4″)
  3. Connect the gas line (1/2″)
  4. Connect the water lines
  5. Check for water leaks
  6. Install the batteries
  7. Turn on a faucet and adjust the water and gas setting to meet your needs

Here’s a short video to guide you thru installation of a Marey 16L:

Operating the Marey Tankless Water Heater

The front panel of this nonelectric tankless water heater is designed to be user-friendly. A digital panel displays the temperature of the water as it leaves the tank. There is also a sighting window, and 3 knobs all conveniently positioned on the outside of the front panel.

There is a gas knob that will allow you to adjust the flow of incoming gas, and a water knob as well. The third knob gives you the ability to switch the water heater from Winter to Summer.

The seasonal adjustment makes it possible to proactively react to the decreased change in water temperature that is common during the winter. By selecting the Winter setting, you will be engaging more burners within the water heater, allowing the unit to effortlessly adjust to the cooler incoming water, and efficiently deliver an endless stream of hot water.

Excellent Performance
Performance is this water heaters middle name! In only a few seconds, the Marey Tankless heats an unlimited amount of water on demand. It is actually capable of heating 3.1 gallons of water each minute!

Capable of performing both when the incoming water pressure is low, and during power outages, this tankless is perfect for homes that have inconsistent water pressure (i.e. well water) and/or have frequent power outages.
Marey LP Water HeatersSafety Features
With such strong performance features, one might think that safety was overlooked. But that certainly isn’t the case with the Marey Tankless. A gas leak and overheating mechanism is built in, as well as an anti-dry combustion safety device. You can have both performance and peace of mind with this tankless water heater.


  •  Ease of operation: The ability of knowing exactly the temperature of the outgoing water, makes adjusting your home hot water temperature a simple process. Additionally, it comes with a detailed user manual with clear instructions on how to install and operate.
  •  Affordable: The heater comes at a pocket-friendly price which matches your budget no matter how small.
  • Energy Efficient: No electricity is needed since it operates on 2D cell batteries, and the gas (or LP, if you choose the propane model) is only used when water is flowing into the unit to be heated.


  • High Altitude: Gas appliances are affected by high altitudes above 2,000. Although this can be resolved with a few modifications.
  • Warranty: Marey makes their water heater to last, however, we wish they would back them up with a more user friendly warranty (see below).

Warranty Information:

The Marey Tankless 10L Water Heater (both the Propane and Natural Gas units) offer a 5 year warranty.

The water heater must be registered in the Marey Heater Warranty Program ( within 30 days from when it was purchased. The warranty is invalid if you do not register within the 30 day time frame.

The warranty coverage is for replacement parts and labor for the first year, and only the parts are covered after the first 12 months.

Our Final Word on the Marey Tankless:

If you’re in the market for a tankless water heater, this is a great choice. With plenty of features and safety precautions built into its design, the Marey Tankless Water Heater is well worth your time of looking into, (and should be considered to be on your short list!)

Marey has built this water heater to last a lifetime, and many users are finding that this is a reasonable expectation. We think this is a very reasonably priced tankless water heater, especially for the features it delivers.

We highly recommend the Marey tankless water heater.