Marey Tankless Water Heaters Reviews & It’s Best Alternative

Having a tankless water heater is more advantageous than a standard tank heater unit, for the reasons that these tankless water heaters create more energy-efficient homes through warming water instantly and in an environmentally-friendly way. Thus allowing the user to have a constant of 2 to 6 gallons of hot water per minute.

Unlike the traditional tank-style water heaters whereby there is a standby energy loss no matter how well the tank is insulated, The instant water heater or tankless water heater only expend energy when you turn on a hot water tap.

To help our readers find the perfect water heaters for home use, we have compiled the best Marley heaters and alternatives to give you these comprehensive reviews and recommendations.

 Disclaimer: Best Osmosis Experts is supported by readers. If you make a purchase after clicking on one of the links in this article, we may get an affiliate commission at no additional cost to you. 

In a hurry?…. Here is a summary of our findings.


Marey Tankless Water Heaters Reviews of 2020

1. Marey GA10LP Power 10L 3.1 Electric Tankless Water Heater

The need to have hot water with a finger snap will get you to desire the Marey GA10LP Power. It will be sure to have you adequately provided for at all times. Undoubtedly your electricity bill will go down drastically with the installation of a tankless water heater.

Electricity outages will not be a concern, as there will be a continuous supply of hot water. Adjustments on the water temperature could be made with a simple twist of a knob keeping everything at the required stature.

Durability is one thing that comes into mind when talking about tankless water heaters. Their compact design will be taking up limited spaces in your home. The continuous supply of hot water will not be limited to your home only, and you could access hot water at all times with the simple installation of the Marey GA10LP.

  • Easy installation process.
  • Allows for temperature control.
  • The compact design allows it to fit almost anywhere.
  • None.

2. Marey 2.5 GPM Electric

A compact design makes the Marey 2.5GPM ideal for installing anywhere with small spaces. A touch of class is what you will get from this tankless water heater, ensuring you are fully provided with hot water at all through.

The adoption of smart heating technology by this tankless water heater will have you save on energy up to 60%. You will not go wrong with installing a tankless water heater as there will be a providence of hot water at all times at the rate of 2.5gallons in a minute.

A straightforward installation process with a minimal amount of adjustments to have it up and running makes this water heater easy to run. Value for your money is what you will get with this tankless water heater, as the best will be delivered at low costs.

  • Self-regulatory technology ensures a full supply of water.
  • Easy to control and operate this tankless water heater.
  • You will get value for your money.
  • The modern look adds on the décor of your surroundings.
  • None.

3. Marey Power Gas 10L 2.7 Tankless Water Heater

About to go on the road and you are concerned about your showering water? Don’t worry too much as this Marey tankless water heater will work efficiently on gas or battery. You can have it installed in your RV, which will take up very little space, making it the perfect water heater to have.

This tankless water heater will be sure to provide you with hot water at all times at the rate of 2.7 gallons in a single minute. Its compact design makes it more portable and could be carried around.

You will be fully provided with an endless supply of hot water at all times. The extra features on this water heater make it desirable to have it, such as the long hose, which makes it easy for you to clean around the presence of both gas and electricity regulator, which you can control. It will work correctly as a back-up or outdoor activities.

  • Saves on your electricity.
  • It would make use of gas in the absence of electricity.
  • Compact design making it more portable.
  • It would serve as a good back up.
  • Serves a small capacity of only 3-4 people.
  • Installation cost is high as adjustments on the venting has to be made.

4. 3 GPM 107,000 BTU Liquid

Your RV will be fully equipped when traveling out of town with this tankless water heater. Its compact design makes it convenient and portable to travel around.

Electricity is not essential for this tankless water heater to continue providing you with hot water. This Marey water heater makes use of the self-regulating technology and will not go to the extreme at any time. Control options on this water heater allow you to adjust the water temperatures to your desires.

It is easy to have this water heater installed as it will only take up little spaces in your RV or at home. You will be fully provided with hot water and be sure to save up on energy with this tankless water heater.

  • You will save on space.
  • The energy used is at the most minimal.
  • The digital control of this water heater makes it easy to use.
  • Capable of supporting a household of 3-4 people only.
  • Complains about the digital control not lasting log enough.

5. Marey GA5PORT Portable

The compact size and design of this tankless water heater will not only provide for convenience when traveling but will be sure to save you on space making it much easier to use.

It would easily fit in small spaces and do an impeccable job of providing you endlessly with hot water at all times. Extra features this water heater will allow you to enjoy full use at home or in your RV.

The provision of a gas hose on this tankless water heater allows connection for the liquid propane gas. Propane does an excellent job in the absence of electricity with no compromise on the service provision.

Are you going out of town for camping? Well, this tankless water heater will offer the best services at a low market price.

  • It saves significantly on your energy.
  • The digital control makes it easy to use.
  • You will get value for your money.
  • The compact design makes it portable.
  • The finishing on this tankless water heater appears cheap.
  • Build-up brought about by hard water may render this water heater faulty.

6. Rinnai V65IP Tankless Water

Rinnai V65IP will have you worrying less about electricity consumption. Propane gas comes in handy, and there will be sure providence of hot water at all times. At the rate of 6.5 gallons in a minute, it is sure to keep the whole house fully provided with hot water.

Going to the mountains during holidays should not worry you, with this water heater you will be fully provided even in the absence of electricity. Adjustments on your water heater could be done comfortably using your phone. Have your heater set on vacation mode when not making use of your cottage anymore.

The company’s warranty will give you peace of mind allowing you to be fully aware of how long this water heater will last.

  • It could be controlled on your phone.
  • The temperature control could be adjusted easily.
  • It is the best build and most reliable in the market.
  • Complains about the control being faulty by some customers.
  • The costs at the beginning being too high.

7. Camplux 5L 1.32 GPM Outdoor

Portability and convenience make this your to go to for hiking activities or any other outdoor event. At all times, the instant providence of hot water is what you will get from the Camplux 5l 1.32 GPM.

Low water pressure should not be of worry to you as this water heater will be working correctly and effectively with slight water pressure. The pump does a great job of ensuring the water pressure is not something to worry about.

At the rate of 1.32 gallons in a minute, you will get from this water heater saving significantly on the electricity with no compromise on service delivery. Precaution measures are put in place at all times, with safety options being taken into consideration.

  • It saves you energy.
  • Perfect for areas with low water pressure.
  • The compact design with the handle makes it portable.
  • The installation process is easy.
  • The hard water buildup may cause faults.
  • Initial costs are too high.

Final verdict

Getting the right tankless water heater for your stay away from home or your trips will make the purchase worthwhile. The features of your tankless water heater should make your trip eventful by ensuring you are continuously supplied with hot water. The size, the price, and ability to save on utility bills without compromise on services rendered is what makes the Marey GA10LP Power a desirable option in the list of tankless water heaters.
The instant provision of hot water at all times by this Marey tankless water heater while saving up on energy by 60% makes this water heater stand out. Its design makes it easy to move around and will serve you perfectly in camping sites or your RV. This water heater’s ability to work even in the absence of electricity will have you fixated on it or the longest time. Its efficiency is unmatched, with the easy installation process making it more desirable.


Going out o town should not limit your comfort. Getting the right tankless water heater to provide you with hot water will make these trips more memorable with the right fixtures in place. This should be a motivation to go or more road trips in the near future.


What is the downside of most tankless water heater?

The tankless water heaters are known to get the most attention to provide you with hot water in an instant. Certain factors that outshine this feature, and they include;
The upfront cost; you will spend a lot of money in the purchase of the tankless water heater compared to the traditional water heater. You will need the help of a professional plumber to fix for the complex ones at a cost.
Limited amount of hot water; the small-sized tankless water heater will not supply sufficient hot water and, in most cases, will have only one tap running with hot water. For a large household, the small units will not be of much help at all.
Special requirements; the tankless water heater is featured with high burners that will require venting arrangements. You will have to create other arrangements to have the venting issue sorted out at a cost.

Is a tankless water heater worth it?

The hype over a tankless water heater is because over specific capabilities that you don’t get from your counterparts. Some of the capabilities are;
Its ability to save you money over a long time. Despite the initial cost of a tankless water heater being too high, the tankless water heater operational cost is very friendly, from saving you on space to utility bills.
Offers on tankless water heater make them more desirable compared to the storage water heaters. The warranties on these tankless heaters are longer and serve you better for that period. Their design makes use of small spaces available.
They are considered to be eco-friendly as they can save on energy, they only heat water when required to unlike the storage heaters that heat for future use. In cases of a breakdown of these heaters, you will not find substantial remains thrown out in the environment.

Are tankless/on-demand water heater better than traditional water heaters?

The traditional water heaters are also referred to as the storage water heaters, they have tanks with them to hold water for future use. Tankless water heaters, on the other hand, as the name states; do not have any tanks to hold to water. The following are some of the reasons we find the tankless water heater preferable to the traditional water heaters.
You will not need much space to have it working correctly. Its compact design and size will take up only small spaces. If you don’t have enough space in your home, you may opt to go for the tankless water heaters.
Its life span is much longer compared to the traditional water heaters. The warranties offered on the tankless water heater are longer compared to the traditional water heaters, and it will serve you up to 20 years and beyond.
Prompt supply of hot water, when needed, is what tankless water heaters do. With the turning n of your tap you will be able to get hot water immediately with the tankless water heater unlike the counterpart that has to heat up water first to provide you with hot water.
Aside from money, the tankless water heater will save you on space, on energy consumption up to 60%. This is so as these tankless water heaters only heat water when needed and not for storage as the traditional water heater does.

Do you run out of hot water with a tankless water heater?

To answer this question you will need to understand the operations of tankless water heater. As the name states for the tankless water heater, it does not have any storage, and it provides hot water instantly when needed. The counterpart with the storage tank holds water and produces it while hot when needed, the issue arises when the water held in the tank runs out. Time will be wasted as it replenishes more hot water. This is something you will not find with the tankless water heater.
The tankless water heater supplies hot water when needed and does not store water aside, waiting for it to be used up. The movement of water within your faucet will trigger the heater in the tankless water heater and will automatically turn on the heater to heat the water as it goes through the faucets. This simply means that you will never run out of hot water at any time.

How long will a tankless/on-demand water heater last?

Most of the tankless water heaters are accompanied by a warranty of 15 to 20 years which should give you peace of mind on the tankless water heater’s operation. The correct maintenance of the tankless will have it operating for 20 years and beyond without any faults at all.

Does a tankless/on-demand water heater increase home value?

Tankless water heaters are considered prestigious additions to a house and could be used as selling point for most houses in the market. They make the houses on sale more desirable compared to those with the traditional water heaters.
Most individuals will go for a house with a tankless water heater because the burden of the initial cost of having a tankless water heater installed will no longer affect them. The new owners of the home will only have to ensure the tankless water heart is well maintained.
Homes with the tankless water heaters tend to sell faster compared to those without. A tankless water heater makes a home more appealing to the individuals in search of properties.

Do tankless water heaters need maintenance?

Maintenance is the extra service you give to your appliances to ensure they run more effectively for more extended periods. Tankless water heaters are not an exception and will need the same care and attention to ensure it operates more effectively. There are some considerations owners of tankless water heaters have to make, such as making use of water softeners.
Hard water could be hectic for those with tankless water heaters, as the buildup will at some point hinder the effectiveness of your tankless water heater and will be slow to heat your water up in the long run. The cleanup of the buildup caused by hard water should be done more severely to avoid blockages in the water heater.
You should also make sure you do not burden the tankless water heater even though it produces hot water on demand make sure the number of faucets on can be managed by the tankless water heater as some faucets will not be able to get hot water.

Where should a tankless/on-demand water heater be installed?

The traditional water heater installation was challenging as you had to look for enough space to have the heater installed. The wrong installation of these heaters would lead to many faults that could not be explained and the heater’s breakdown.
The tankless water heater on the other hand, the location for installation would not be much of concern as the small compact design of this heater will be able to work at any location. The previous water heater may have been located at the basement, where it will be advisable to have the tankless one there with minimal adjustments that will save you on the installation expenses.