Are you looking for best gas tankless water heater, we’ve consulted top experts who has in-and-out knowledge about the gas tankless water heater. We choose the top most quality product, which comes with amazing features you’ve never heard before. We have filter more than 100+ of product to give you top 10 list of best gas tankless water heater.

This list is undoubtedly the best gas tankless water heater available in the market today. However, if you don’t want to spend more time on filtering and finding which one is good gas tankless water heater, then you should absolutely go for our Top list of the winner. which comes with all the basic features one could expect in a gas tankless water heater.


Best gas tankless water heater – The Winners!


But these three has some more competitions too, Check out below List of Top 10 best gas tankless water heater.If you are ready to choose a new gas tankless water heater, check out our recommendations for the best gas tankless water heater. But if you’d like to learn more about the various types of gas tankless water heater available and how to choose the right one for you, read on.

List of Top 10 Best gas tankless water heater In Detailed


SaleBestseller No. 1
Rinnai Tankless Hot Water Heater / V75IN / Natural Gas / 7.5 GPM, Indoor Installation
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 7.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
SaleBestseller No. 2
EcoSmart ECO 11 Electric Tankless Water Heater, 13KW at 240 Volts with Patented Self Modulating Technology
  • Endless On-Demand Hot Water; Consistent hot water when you need it that never runs out; Continuously monitored water temperature and controlled flow rates ensure efficiency and consistent performance within 1 degree of selected temperature
  • Save Space; EcoSmart tankless electric water heaters are 90% smaller than traditional tank heaters; may be installed on wall or at point of use; Dimensions 11.5 x 8 x 3.75 inches
  • Save Energy; EcoSmart tankless electric water heaters are 99% thermal energy efficient; Only heats water when called unlike a tank heater that maintains water temperature even when not being used.
  • EcoSmart ECO 11 Sizing; 13-kilowatt tankless electric water heater ideal for providing hot water for a bathroom, small sink, office breakroom and other point-of-use or low-flow applications; provides between 1.3 and 3.1 gallons-per-minute depending on the inlet water temperature; refer to the sizing guide to select the proper solution
Bestseller No. 3
Rinnai Indoor Tankless Hot Water Heater / V65iN / Natural Gas / 6.3 GPM, Large, V65iN-Natural 6.5
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
Bestseller No. 4
Rinnai V65EP RV65eP, Large, Propane
  • Energy and Space Efficient: Space-saving design conserves energy as it heats only when necessary
  • Optimal Water Pressure: High-performance up to 6.5 GPM hot water flow rate for a powerful, constant stream
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
  • Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively
Bestseller No. 5
18L Instant Tankless Water Heater, Pevor 36KW Tankless Water Bolier Propane Gas Water Heater Instant Hot Water Heater with Shower Kits
  • 【High Efficient Energy Saving】This water heater exchanger and main burner adopt mostly advanced energy-saving and combustion technology to decrease gas consumption and burning noise.
  • 【Low Water-pressure Startup】The water control linkage valve makes the heater start up under low water pressure and stable water flowing under high pressure to meet the requirements of those in water shortage areas and those living in high stairs.
  • 【Low Flame Inspection】To automatically shut down gas power under unrexpectable flameout; Both cold water and warm water can be properly controlled.
  • 【Over Water Pressure Protection Function】To automatically decrease pressure under excessive high water pressure.
  • 【Anti-freezing Protection Function】The anti-freezing apparatus can discharge the stock water to avoid damaging machine itself by freezing under cold areas or in case of long time no use.
Bestseller No. 6
Rinnai RL94IN RRL94iN, 9.4 GPM, RL94iN-Natural Gas/ 9.4 GPM
  • Energy Factor of .82
  • Built-in Rinnai Circ-LogicTM recirculation program cycles an external pump at pre-set intervals and temperatures to maximize efficiency and comfort
  • Certified for Installation in Manufactured (Mobile) Homes
  • Enhanced scale detection lessens possibility of serious, long-term damage to unit
Bestseller No. 7
Camplux Tankless Water Heater Natural Gas,High Efficiency Natural Gas Tankless Water Heater with Fahrenheit Digital Display, 3.18 GPM On Demand Water Heater for 2-3 Persons Bathroom Indoor Use,White
  • 3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM tankless water heater natural gas delivers 3.18 gallons per minute of on-demand endless hot water ensures constant comfortable instant hot water for 2-3 persons whole house. 3.18-GPM heater is activated by water flow rather than water pressure; Minimum activation water capacity rate: 0.65 GPM-4.8 GPM; Maximum input rating: 82,000 BTUs; Water connection location/size: Bottom/0.5-inch NPT.
  • Convenient, Easy Installation -The tankless water heater uses standard 1/2" BSP water fitting and gas inlet. The water heater comes with1/2 " BSP female to 1/2" NPT male gas connector adapter then you want hook this water heater to natural gas pipe directly.It also comes with 2.3" horizontal vent pipe,ensures efficient power ventilation. You can take Camplux customized wall thimble-WT236 for perfect indoor use.
  • Modern Design,Easy Operation -Trendy and modern design with unique black glassy front panel,easy to control the water temperature with LED touchscreen (Fahrenheit and Celsius switch optional).The compact size on demand water heater saves more space than traditional tanks.
  • Outstanding Features- The Camplux tankless gas water heater comes with oxgen-free copper heat exchanger and v-type stainless steel burner,high heating efficiency up to 89.98 %; 90°wind isolation design, this tankless natural gas water heater can anti backflow wind in high floors, the S/S 2.36 ” vent pipe exhaust harmful gases quickly.
  • 6-In-1 Protection Ensure Your Safety- Dry combustion,flame failure device, anti-freezing protection, over heating protection to ensure your safety. Fully automatic temperature controls with an energy saving mode and child lock technology.
SaleBestseller No. 8
ecosmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology,White
  • The product is highly durable
  • The product is easy to use
  • Manufactured in China
  • Amperage (amps): 75. Activation flow: 0. 3 GPM. Flow Rate @ 35 F Rise (gallons/min): 3. 51 gal (US)/min
  • The product works and is compatible with 2 X 40 AMP (DP) breakers and 2 X 8 AWG wire
  • Lifetime warranty for residential use
  • Save up to 60% on your water heating costs with the most advanced, self modulating technology available
  • Never run out of hot water with an ECOSMART tankless water heater.
Bestseller No. 9
Tengchang 16L Natural Gas Hot Water Heater 4.2GPM Tankless Digital Constant TEMP Boiler with Exhaust Pipe
  • This electric water heater features instant heating, tankless and constant temperature control. With protection against dry heating and over-temperature protection. It is safe, energy-saving and long lifespan, providing you and your families more comfortable bathing experience.
  • Material: Plastic + Metal Exhaust temperature:Maximum 392°F Heating Material: nickel-chromium alloy liner
  • Rated Voltage: AC 110V / 60Hz Rated Heat Input Power: 32kW Rated Hot Water Output: 16L/min Electrical Rating: 36W
  • Gas Pressure: 2000Pa Rated water pressure: 0.02-0.8Mpa Gas pipe: G 1/2'' Water Inlet: G1/2'' Water Outlet: G1/2''
  • Waterproof rating: IPX4 Support thermostat: Yes Style: Vertical
Bestseller No. 10
Noritz NR50ODNG Outdoor Tankless Water Heater, max. 120,000 Btuh, 5.0 Gpm - Natural Gas
  • Endless hot water
  • Ideal for outdoor applications
  • High Efficiency
  • Low Nox
Hope this list of the best gas tankless water heater will be helpful for you. Feel free to contact us if you have any questions about our site or our reviews, and we will be happy to help you with your purchasing decisions in any way we can.