Marey GA10NGDP 3.1 GPM Tankless Water Heater

The Marey GA10NGDP is a lightweight tankless water heater that operates on 2 D-cell batteries. It’s ideal for off-grid use, homes with frequent outages, and remote places where there’s no electricity. The heater churns out 3.1 gallons of hot water per minute at 20PSI. That’s more than sufficient to meet the hot water needs of smaller households with a single hot water application (at a time). Being small in size, homeowners can do a DIY install in no time. Our review team at TopTenWater.com has evaluated this product from a bunch of different angles to give you an unbiased evaluation on it.

Description

The Marey GA10NGDP is a lightweight tankless water heater that operates on 2 D-cell batteries. It’s ideal for off-grid use, homes with frequent outages, and remote places where there’s no electricity. The heater churns out 3.1 gallons of hot water per minute at 20PSI. That’s more than sufficient to meet the hot water needs of smaller households with a single hot water application (at a time). Being small in size, homeowners can do a DIY install in no time. Our review team at TopTenWater.com has evaluated this product from a bunch of different angles to give you an unbiased evaluation on it.

The Marey GA10NGDP tankless water heater activates by water flow right from the time the faucet starts running. This unit works well with low water pressure and only uses gas when the water is flowing. Though it takes a couple of seconds for hot water to start flowing, the heater supplies as much hot water as needed. It comes with a digital control display that shows the real outlet water temperature. You can always adjust the temperature until you attain the desired comfort level.

The Marey GA10NGDP is compliant with the tankless water heater requirements set by the Department of Energy. The good thing about this unit is that it comes with a 5-year warranty, giving you peace of mind that your investment is safe. When installed properly, the heater can maintain 87% energy efficiency. It comes with an anti-combustion device plus gas safety protection.

  • 2 D-cell batteries are all that you need to operate the ignition on the Marey GA10NGDP. No electricity is required
  • Saves significant volume of water and up to 60% of electricity compared to conventional tank water heaters
  • A running tap with low water pressure is all that’s required to activate the unit
  • Rustproof design ensures that the water channel remains intact, thereby, preventing water loss due to leakage
  • The heater has a compact design that not only saves space, but allows for quick installation even in small spaces
  • Customers enjoy timely support from customer service and 5-year product warranty against manufacturer’s fault
GOODBAD
Works well with low pressure waterTakes a bit longer to heat water
Rustproof designNot suitable for large family
Supplies unlimited volume of hot waterDoes not shut automatically
Multiple points of useNot for commercial applications

Features

  • 87% efficiency for a lifetime
  • Natural gas/liquid propane powered
  • Rust proof
  • 5-year product warranty
  • 792,228 maximum BTU
  • 23.6″ H x 13.6″ W x 6.9″ D.
EmissionsLow NOx
Ignition2D cell batteries
Maximum BTUs79,228
Water Connection1/2″
MultilinkNo
Water Connection LocationBottom
Voltage3v
Flow Rate3.1
UEF0.98
Remote ControlNo
LEED Rating0.0
Heat ExchangerCopper
ENERGY STAR® QualifiedNo
TechnologyNon-Condensing
Height23.6″
Width13.6″
Vent TypeDirect Vent
Product Weight21lbs.
Depth6.9″
Vent size4″

The Marey GA10NGDP is a small but reliable tankless water heater with great potential. Customers love the fact that they can operate it without electricity and heat water at low pressure. Though it was designed for single application, it can supply hot water for the bathroom and sink. The only inconvenience you may have to deal with is that the GA10NGDP may take longer to warm water in colder climates. Overall, the Marey GA10NGDP is an affordable and functional water heater that does a great job of supplying hot water. Here is what we at TopTenWater.com discovered on sites where this product is being sold.

Customers have mixed feelings about this unit. Most customers pointed out that the Marey GA10NGDP is a compact and DIY heater. It’s easy to install and works great with a bit of adjustment. Being smaller and much lighter than other water heaters, it takes up less space in a home. Some customers were happy with the energy efficiency of their unit, saying it uses less electricity and little propane.

Unhappy customers said that their heaters were unreliable in supplying hot water. Some said it heats water for 5 minutes before going cold. The other issue that customers had to deal with was fluctuation in water temperature, something which made them adjust their cold water. For some, the heater took time before they could get water at the desired temperature. Others complained they received units with defective gas valves.

Users enjoyed the easy installation of this device, since it’s quite straightforward. It has two water lines, a vent, and a gas line. One user was able to turn it on immediately afte opening the faucet. When he closed the faucet, the unit shut off soon after. This same user was easily able to adjust the water temperature and stated it was much like how he operated his traditional water heater. Except that the constant supply of hot water without any wait was a welcomed change. Another user said they would recommend the appliance to friends who hrave a small one or maximum two-bedroom apartment.

One user was utterly disappointed in the Marey GA10NGDP tankless water heater because they had nothing but problems since they installed the appliance. They reached out to the manufacturer multiple times about the items used in their instructional videos and about issues they had with the flame going out. However, they had to wait for more than 10 minutes on average and eventually weren’t able to get on the phone with anyone. Another user said the unit worked fine until it got very cold. The appliance eventually gave out and stopped working when the temperature fell below zero.

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