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

This list is undoubtedly the best on demand 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 on demand 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 on demand water heater.


Best on demand water heater – The Winners!


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

List of Top 10 Best on demand water heater In Detailed


SaleBestseller No. 1
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.
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
Hyperikon Tankless Water Heater Electric 11kw, 180-250V Compatible, 106.7 Amps, 0-87 PSI, ETL Listed, NFS Approved with Integrated Temperature Sensor, Residential, Indoor
  • INSTANT HOT WATER - Enjoy never-ending hot water at any time of the day! It has a heat capacity of 37,543 BTU. Use the touch enabled control panel to set your desired temperature between 86°F and 126°F.
  • MINIMUM WATER FLOW 0.85 GPM - The minimum water flow for activation is 0.85 GPM. The power used is based on the gallons of water used per minute.
  • ENERGY-EFFICIENT - Hyperikon’s 11kw tank-less water heater will only draw the amount of electricity required to produce the hot water, with no pre-heating.
  • THREE 50A CIRCUIT BREAKERS - Connect this tankless water heater to 3 minimum 50A Circuit Breaker. Please refer to the installation manual before installing. The on demand water heater is leakage proof and also over-heat protected at 153°F (67°C)
  • 5 YEAR WARRANTY - When we say we've got you covered, we mean it. Should your product fail within the first 5 years from the date of purchase we will fulfill our promise and replace it free of charge to you.
Bestseller No. 5
Happybuy Tankless Water Heater Propane 18L Propane Water Heater 4.8GPM 36 KW Propane Tankless WaterHeater Stainless Steel on Demand Water Heater Propane Fit for Home Outdoor RV Use
  • 【SUPERB MATERIALS】- Power: 36 KW; Hot Water Output: 18 L/min(4.8 GPM); Gas Supply: LPG(Liquid Petroleum Gas); Water Temperature: 50 °F -140 °F; This tankless water heater propane is crafted with stainless steel case and inner copper devices, making it anti-rust, high-temperature resistant, no water leakage, and durable. Come with a portable shower head kit.
  • 【6-IN-1 MULTI PROTECTIONS】- Our propane water heater is upgraded with six protection ways to ensure your security on the shower, such as Over 75℃(167 °F) protection, low water flow protection, anti-frozen protection, over water pressure protection, no flame protection, 20min timer, etc.
  • 【EFFORTLESS CONTROL】- You can easily adjust the water temperature by rotating the gas & water knobs on the panel. Switch the summer/winter mode to change the fire row amount, and save 40% gas in your bill. The combustion device will reach ≥80.8% thermal efficiency to save 11.5% energy. Start at a 0.015 MPA low water pressure; normal working pressure is 0.02 MPA-0.8 MPA.
  • 【WALL-MOUNT & DETAILS】- This gas water heater is light-weight & portable to be installed on the wall, tree, or outside the RV for space-saving. Well-selected devices are included like copper standard G1/2" hose connectors, filtration mesh, gas emission tube, and copper water tank. Ignite the heater with 2 "D"cell batteries, and no pilot light is needed.
  • 【DIVERSIBLE USE SCENARIOS】- CE test passed, fast to heat, this propane hot water heater is perfect for showering, pet washing, outdoor cleaning, camping and trip road, etc. Provide you with constant hot water, especially in winter or cold places. Instant, endless hot water, enjoy a comfortable showering at any time & any location.
SaleBestseller No. 6
Tankless Water Heater Electric ECOTOUCH 9KW 240V on Demand Water Heater Self-Modulating Instant Hot Water Heater Point Of Use Water Heater ECO90 Black
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 9kW heating system, the electric tankless water heater ECO90B supplies instant & endless hot water of 116℉or higher temp, no waiting for preheat nor temperature fluctuations, perfect companion for sinks, bringing you perfect experience of comfort and relaxing.
  • 【SMART SELF MODULATION】The on demand electric water heater ECO90B adjusts power input based on flow rate and temp setting in real time. As water flow reduces, power input decreases, thus you still get ideal, comfortable temp instead of scalding hot water. Optimal energy efficiency 99.8% saves considerable electricity charge per year.
  • 【UPGRADED HEATING SYSTEM】Featuring micro-computer control and patent heating technology, ECO90B electric water heater promises no “cold water sandwiching”. And unique heating element avoids any corrosion inside pipes so as to extend service lifespan.
  • 【SAFE AND DURABLE】Applied with multiple protection devices, every piece ECO90B tankless water heater goes through strict tests to ensure 100% safety. Inner water and electricity lines are designed to run separately so as to avoid leakage or harm of scale build up. Approval by ETL and qualifies for UL, you can expect outstanding performance for years to come.
  • 【CONVENIENT USE】The ECO90B electric tankless water heater comes with digital display & touch control panel so temp setting is an easy job. It's space saving, measuring: 15.4″(H) x 10.3″(W) x 2″(D). Plus it has a stylish, modern design that blends in any decor. Please verify it is the right size for you: [email protected]; pipes fittings: 1/2" NPT.
SaleBestseller No. 7
Ecosmart ECO 36 36kw 240V Electric Tankless Water Heater
  • Sleek and compact design with digital output temperature display
  • ECOSMART tankless water heaters are 99.8-percent energy efficient
  • Manufactured in United States
  • Pipe Fittings:3/4 inch NPT
  • Required Breaker:4 x 40 A
  • 150 A
Bestseller No. 8
RecPro RV Tankless Water Heater | On Demand Hot Water Heater | Gas Water Heater | Remote Control Included (Black)
  • No more waiting for the water tank to warm up or running out of warm water halfway through your shower. With this amazing machine, you can have a steady stream of hot water flowing to your faucets or shower without waiting for the tank to warm up.
  • There is a forced exhaust structure that keeps the air safe and clean while and after entering the combustion chamber. There is also a dust net to make sure no dirt gets into the tankless water heater.
  • There is a low water pressure startup, which helps to protect the heater and make it easier to use.
Bestseller No. 9
Thermoflow 12KW at 240V Tankless Water Heater Electric, On Demand Instant Hot Water Heater with Self-Modulating Temperature Technology, CSA Certified Wall Mounted
  • [Upgraded Internal ] On Demand Endless Hot Water - instant hot water for small apartment or sink point of use, constant supply of hot water whenever and however long you need, eliminate waiting time and never run out of hot water; 2.34GPM @35℉ Temp Rise. Contact us for any product issue. The product is covered by 2-years warranty
  • Energy and Cost Saving - Heating water only when it's needed with heating efficiency up to 99%, savings of up to 50% on water heating costs; minimal activation flow rate 0.58GPM
  • Self-Modulating Temperature Technology of Germany - use only necessary energy to heat water to temperature of your needs, also ensure steady output temperature despite of flow fluctuation. Adjust temperature in 1-degree increments; temperature range 104-140℉
  • Compact and Wall-mounted design, thermo cut-off protection, CSA certified, IP24 protection, ensuring a long service life
  • Please Verify it is the right size for you: Dimensions: 13.6" x 7.9" x 4.8" ; Weight: 5.4 lbs; Pipes fittings :1/2 inch NPT; Electrical requirements: 12 kW at 240 volts. Nominal current: 50A. Required breakers:1 x 2-POLE 60 AMP. Required wire: 8 AWG. (Breakers and wire are NOT included); 24months warranty and timely customer service support (support email and amazon message)
Bestseller No. 10
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
Hope this list of the best on demand 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.