Marey Gas Tankless Water Heater – 16L 4.2 GPM Natural Gas Water Heaters for Outdoor Use with LED Display – Off Grid Water Heater



  • No need for electricity, Battery Ignition: The Marey 16L outdoor Tankless water heater ignites with 2 D batteries. Perfect for off-grid areas, campsites, cabins or any place where electricity is not available.
  • Continuous Hot Water on Demand: This Marey 16L tankless water heater can support up to 3 simultaneous points of use, depending on the region, with a maximum 4.2 GPM at a 45º F temperature rise, making it the perfect outdoor water heater for your shower.
  • Outdoor Shower Bonus: Elevate your experience with our Marey 16L natural gas tankless water heater, which includes a complimentary outdoor shower head for added convenience.
  • Embrace the reliability of our 109,000 BTU Gas 16L outdoor natural gas tankless water heater. The Marey tankless water heater natural gas-powered system has a stable flow for your everyday hot water needs.


The Marey 16 Liter Natural Gas Tankless Water Heater with a 4.2 GPM capacity is a great whole home water heating solution perfect for cabins, stables and homes medium sized. As it does not require electricity, the device is powered by 2 D batteries. It is therefore ideal for off-grid areas or any other place where electricity is not available. This water heater can deliver a maximum of 4.2 GPM for a perfect outdoor shower at an outlet water temperature of 115 ° F. This very versatile unit is ideal for many different outdoor uses, such as washing your pet, washing your car and also for taking a large outdoor shower. It can also be installed indoors with proper ventilation, in accordance with local building and plumbing codes. The unit includes a convenient digital panel that allows you to adjust the water temperature and gas flow, this design provides hot water on demand, saving valuable resources such as energy and water. Designed to supply up to 3 simultaneous points of use, this device offers a hot water solution for a wide variety of applications. Its compact size saves space and is easy to install.

Additional Features:

  • Saves Money and Space: The Gas 16L tankless water heater has a wall-mounted design that facilitates set up outdoors and saves space indoors.
  • The 16L tankless water heater comes with a LED digital display that shows output water temperature.
  • Multiple Safety Features: auto cut-off, automatic ignition, anti-dry combustion, over-pressure relief, overheating & flame-out protection.
  • Warranty: 5 years limited warranty by the manufacturer. 1st year covers parts and labor from Marey Service Center. Additional 4 years coverage for parts only. Shipping remains under the customer’s responsibility.
  • The 16L outdoor tankless water heater is designed for temporary outdoor use. It needs to be protected from rain and wind and it does not have freeze protection. Do not install the 16ONGDP Marey tankless permanently outdoor.
  • We recommend installation to be performed by a professional for safety and compliance. Follow all building and plumbing codes for installation.
  • Not recommended for elevations above 2,000 ft.
  • Why Choose Marey: Marey offers water heating solutions for every budget and lifestyle. Since 1955, we’ve been providing exceptional and innovative tankless water heaters, meeting your everyday need.
Prices and promotions shown on this website are for sales and orders shipped only to the US Mainland. Puerto Rico customers please visit