Are you looking for best water heater tankless, we’ve consulted top experts who has in-and-out knowledge about the water heater tankless. 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 water heater tankless.

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


Best water heater tankless – The Winners!


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

List of Top 10 Best water heater tankless In Detailed


SaleBestseller No. 1
Rheem RTEX-18 18kW 240V Electric Tankless Water Heater, small, Gray
  • External digital thermostatic control with LED display (+/1 degree accuracy)
  • Most advanced self-modulation, adjust power to meet hot water demand
  • Durable Copper immersion two heating elements, field Serviceable. Flow Rate- up to 4.4 GPM
  • Simple installation – bottom 3/4 inch NPT water connections
  • Threaded for easy replacement, simple installation, digital temperature display
SaleBestseller No. 2
EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology
  • 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. 3
Rinnai V65iN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • 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
SaleBestseller No. 4
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
SaleBestseller No. 5
GIRARD 2GWHAM Tankless Water Heater
  • Regulates the burner to maintain the set hot water temperature.Freeze protection - designed for winter Use
  • 42,000 BTUs which provides the optimum performance for an RV's plumbing
  • No special LP gas lines or special plumbing required
  • Quiet brushless motor
  • 12V power operates at less than 3 amps
Bestseller No. 6
Electric Tankless Hot Water Heater 220/240V Instant,Suitable Shower Sink Kitchen Bathroom Bathtub RV Whole House, Hot Water Output of 1.8 GPM,2 PCs 16” Long 1/2”FIP copper head hose (Black 12KW)
  • 【CONTINUOUS FLOW】Equipped with a 12KW high-power heating system, BIS12 is specially designed for bathing, which can automatically maintain water temperature for your constant comfort during bathing. If the hot water demand exceeds the capacity, simply set the temperature to 116°f or reduce the water flow through the water flow-regulating valve, and the hot water shower will never be interrupted. (116°f is the most comfortable temperature for bathing)
  • 【SPACE & ENERGY SAVER】Mirror design provides aesthetic perception. The compact design not only saves space but also provides endless hot water for the whole house. The power output can be set through 9 temperature setting gears. When you don't need the water too hot, BIS12 can automatically change gears to reduce charge. It's 99.8% energy efficiency which can save a lot of electric charges.
  • 【EASY OPERATION】 The water flow passes through the electronic flow sensor and then through the powerful cast aluminum internal heating system to achieve water and electricity separation, which is safer and more reliable. In addition, the corrosion inside the pipe is avoided to prolong the service life. No noise when in use, and it has the function of digital display and setting temperature memory.
  • 【Power 12 PLUS】 The specific model of BIS12 is 12KW, 220V / 240V. It is recommended that the minimum requirement of household appliances is 100A, and the output water temperature is 86 ° f to 131 ° F. Each device is equipped with multiple protection devices and has been strictly tested to ensure 100% safety. The internal water and electricity are operated separately to avoid the hazards of leakage and fouling.
  • 【WARRANTIES INCLUDED】BISELONG's top tankless instant water heaters have reached the highest standards of comfort and reliability. The purchase includes our 7-year leakage and 3-year parts warranty. Accessories include (2PCS 16"Long, 1/2"NPT stainless steel copper head hose, rain sprinkler, power wall, water flow valve).
Bestseller No. 7
Rheem 240V Heating Chamber RTEX-13 Residential Tankless Water Heater, GRAY
  • External adjustable digital thermostatic control with LED display (+/1 degree accuracy
  • Durable Copper immersion two heating elements, field Serviceable.Self-modulating power control
  • Simple installation – 1/2 NPT adapters included; side 1/2 inch Compression water connections
  • 99.8% energy efficient. External controls to adjust temperature in increments of 1°f. Water-Saver Shower Head – 1.5 GPM
  • Threaded for easy replacement, simple installation, digital temperature display 54 A. 13kW Model Flow Rate: up to 3.17 GPM
  • 54 A
Bestseller No. 8
Rinnai V65EP Tankless Hot Water Heater, 6.5 GPM, Propane, Outdoor Installation
  • Endless Hot Water: Enjoy unlimited hot water flow throughout the house; compact, durable, and easy to install; professional installation recommended
  • 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. 9
EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG
  • PROPANE GAS LPG UNIT
  • Starts with only 2 PSI of Water Pressure - Amazon Exclusive
  • Exclusive - Vent-Free Technology No expensive Flue required
  • Compact size: front 11.5” - depth 6” – height 16”
  • 2 SIZE D Batteries Included (For Automatic Ignition)
Hope this list of the best water heater tankless 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.