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Top 10 Best on demand hot water heater Reviews

Top 10 Best on demand hot water heater Reviews

Top 10 Rated on demand hot water heater in 2021 Comparison Table

Bestseller No. 1
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.
Bestseller No. 2
Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5.5kW,Electric Instant Hot Water Heater,Overheating Protection, Black
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of 116℉or higher temp shortly, no waiting for preheat nor terrible temp up & down, perfect companion for sinks. Time to get rid of those "lukewarm" toys.
  • 【SMART SELF ADJUSTMENT】The hot water heater adjusts power input based on flow rate and temp setting in real time. For example, less power will be applied by the system when waterflow reduced, thus you still get ideal temperature instead of scalding hot water, which means comfortable experience. Optimal energy efficiency of 98% saves considerable electric charge.
  • 【CONVENIENT USE】The tankless water heater comes with digital display & touch control panel so temp setting is easy job. Now turn on the tap and let the smart unit do the rest, you needn’t go through hard lesson about temp setting by a mixer tap without any hint. This Black model does not comes with Remote control, useful for installation under sink.
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. 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.
  • 【POINT of USE】The sleek tankless water heater is compact as an oatmeal box, making it possible to install anywhere close to outlet and avoid energy waste. It can be mounted horizontally, vertically, obliquely, ideal for kitchen, bar, school, hospital, community and hair salon. Please verify it is the right size for you: [email protected]; dimensions 11" x 7.5" x 2.35"; pipes fittings :1/2" NPT.
Bestseller No. 3
Thermolfow 110V~120V 3.5kW Mini Tankless Electric Water Heater, Point of Use On Demand Instant Hot Water Heater for Sink Washing, Wall Mounted, CSA Certified Hard Wired
  • NOTE: Choose Only for 110~120V, Water flow and inlet water temperature will affect the heating performance as it's only 3.5kW. 2 years warrant for free replacement and refund, contact us for any problem before your return. TANKLESS electric water heater - 0.5GPM at temp rise 45°F for single sink washing use of small water flow use, ideal for summer or warm weather.
  • HARD WIRED ENDLESS HOT WATER - No need to preheat before using. As soon as you open the tap, the water flows with your desired temperature. High efficient, Energy Saving
  • COMPACT DESIGN - Super compact designed, even smaller than a shoe box. Wall-mounted design frees up floor space for more storage, easy to install into washbasin and other tight spaces!
  • EXCEPTIONALITY DURABLE - Instant hot water thanks to rapid and maintenance-free bare wire heating systems. High quality alloy bare heating element has good corrode resistance and acid-resisting, with longer lifespan, instantaneous heating efficiency up to 99%.
  • NOTES - Please verify that this model is the right size for your hot water needs and electrical requirements before purchase & installation. Dimensions:7.4" x 5.4" x 3.4" ; Weight: 3.0lbs; Pipes fittings :1/2" NPT, Electrical requirements: 3.5 kW, 120 volts, Nominal pressure: 150PSI. Nominal current:29A. Required breakers:1x 2-POLE 30A. Required wire: 1 x 12 AWG . ( Breakers and wire are NOT included )
Bestseller No. 4
Camplux 2.64 GPM Portable Propane Water Heater,Tankless Propane Gas Water Heater with Digital Display,On Demand Hot Gas Water Heater for Campings,Road Trips,White
  • Compact,Light Weight Portable Design-12.8 (L)*6.1(W)*21.65(H) inch ,Weight-23.85 lb. Compact and portable design perfect for barns,cabins,outdoor instant hot shower and road trips.
  • Easy Installation for Instant Hot Water-It only takes you a few minutes to get 2.64 gallons per minute of instant hot water. The camplux portable water heater lights when water pressure between 3.6-110 PSI, low water pressure is perfect for campings and remote cabins.
  • Multiple Protection Ensure Your Safety-Flame failure device, anti-freezing protection, over heating protection to ensure the family safety. The anti-freezing drain plug discharges the residual water to avoid freezing in cold areas for long-time maintenance. Gas supply automatically shut off when high water temperature protection over 167 °F.
  • Power Efficient & Energey Saving -Maximum power output 68,000btu/hour, you will get instant endless hot water easily wherever you are. Compact and lightweight structure with 11.5% energy saving technology. The propane water heater exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise.
  • Important Tips -To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe. The tankless water heater will "caught on fire "with improper operation. Always check gas leakage before operation.
SaleBestseller No. 5
Tankless Electric Water Heater Instant On Demand 24KW 240V, Hot Water Heater Digital Display Premium Metal, Domccy Electric Hot Water Heater with Self-Modulating Overheating Protection, White
  • Instant & Sufficient Tankless Water Heater: Using a 24KW heating system, the electric water heater supplies instant, consistent and 24-hour endless hot water of 80-140℉ suitable for whole house using, even more sinks and showers at one time. No waiting for preheating nor terrible temp up and down dramatically, the perfect companion for sinks.
  • Compact Space & Energy Saving: 13.15"*17"*3.54" Tankless water heater is compact and lightweight, easy to install anywhere and quite space-saving. Hot water heater adjusts power input based on flow rate and temp setting in real time, less power will be consumed when the water flows reduced, thus you still get a comfortable temperature instead of scalding hot water or freezing cold water. The high energy efficiency can reduce the cost of hot water by 60%, effectively saving electricity bills.
  • Safe & Durable Operation: Applied with multiple protection devices like over-heating auto-stop, no water auto-stop, power-off memory function, every piece goes through strict tests to ensure 100% safe. Inner water and electricity pipes are designed to run separately to avoid leakage or harm of scale build-up. Approval by ETL CETL FCC, you can expect outstanding performance for years to come.
  • Premium Electric Water Heater: This tankless water heater is crafted with an excellent metal case and ialuminum heating body, making it anti-rust, high-temperature resistant, no water leakage, durable and fast to heat, this hot water heater is perfect for showering, pet washing, outdoor cleaning, and camping, etc. Provide you with constant hot water, especially in winter or cold places. Instant, endless hot water, enjoy a comfortable showering at any time and any location as you desire.
  • Convenient & Easy to Use: The tankless water heater comes with a digital display and knob control panel so the temp setting is quite an easy job. You can easily adjust the water temperature by rotating the knobs on the panel. Press and hold the knob for 3s to switch between Fahrenheit and Celsius. Purchase Notice: Please note that the 24KW tankless water heater requires 3 x 40 AMP circuit breakers and 3 x 8 AWG wires, and the minimum water flow is 0.66 GPM / 2.5L / min.
Bestseller No. 6
Electric Tankless Water Heater, 4500W 110V HD LCD Display 55℃ Tankless Water Heater Intelligent Constant Temperature On Demand Water Heater Instant Hot Water Heater for Rv Kitchen Salon(black)
  • 【INSTANT & SUFFICIENT HOT WATER】Say goodbye to hot and cold. the 4500w tankless water heater has intelligent constant temperature technology, control the water temperature difference within the appropriate temperature.Meanwhile, one machine with multiple functions, to meet the household's multiple water needs at the same time, with a high power of 4500w and a temperature of 55℃.
  • 【LCD DISPLAY 】The high-definition lcd display allows you to keep track of the working status of the water heater and is easy to operate. Meanwhile, the instant water heater is great for kitchen, bar, school, hospital, community and hair salon. It is perfect companion for sinks. time to get rid of those "lukewarm" toys.
  • 【SAFE ADN DURABLE】Stainless steel cup heating body, water heater adopts fast heating system function, instant hot water output. no need to wait for a long time, uniform heating and long life, water leakage, explosion‑proof. Thus you still get ideal temperature instead of scalding hot water, which means comfortable experience.
  • 【HIGH QUALITY MATERIAL】The 4500w electric tankless water heater uses tempered glass surface material, fashionable texture. Meanwhile, the tankless water heater is waterproof and scratch resistant, safer to use, when cleaning-wipe it out, simple and convenient.
  • 【100% WARRANTY】We promises every customer a 100% shopping satisfaction, feel free to reach us if you have any questions about your purchase.We will give you a professional and detailed reply within 24 hours.Click to buy now!
SaleBestseller No. 7
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
Bestseller No. 8
Excel Tankless On-Demand Gas Water Heater VENTFREE – Propane (LPG) - Low Water Pressure Startup
  • PROPANE LPG GAS UNIT
  • "Low Water Pressure" Startup Technology
  • Starts with only 2 PSI of Water Pressure - Amazon Exclusive
  • Exclusive - Vent-Free Technology No expensive Flue required Amazon Exclusive
  • Compact size: front 11.5” - depth 6” – height 16”
SaleBestseller No. 9
Electric Tankless Water Heater 240V Electric Hot water Heater Self-Modulation on Demand Water Heater 13kW Point of Use Water Heater ECO130W White
  • 【Electric Tankless Water Heater】applied with powerful 13kW heating system, the tankless water heater electric ECO130W supplies sufficient instant and endless hot water of 110℉ or higher in seconds, no waiting for preheating nor terrible temp fluctuation during shower time, perfect companion for single shower, sink faucets,dishwasher or washing machine.
  • 【Self Modulation Instant Water Heater】the electric hot water heater ECO130W adjusts exact power input based on current flow rate and temp setting. For example, less power will be applied by the smart water heater when you reduce water flow, thus, you get ideal temperature instead of scalding hot, which ensures comfortable experience and excellent energy efficiency. Also, optimal energy efficiency of 99.8% saves considerable electric charge for you.
  • 【Convenient Use】the electric tankless water heater 13kW comes with digital display & touch control panel so temp setting is easy job. Best of all, useful information on the screen helps you get full understanding of the working status, you needn’t go through hard lesson of temp setting by a mixer tap without direct information. Now turn on the faucet and let the smart hot water heater do the rest.
  • 【Safe and Durable Hot Water Heater】newly updated and applied with multiple protections, every piece electric tankless water heater from GREATBEAR goes through strict tests to ensure 100% safety. Inner water and electricity lines are designed to run separately so as to avoid leakage risk and scale build up. You can expect outstanding performance for years to come.
  • 【Point of Use Water Heater】 the sleek tankless water heater electric ECO130W is compact as a shoes box, making it possible to install anywhere point of use to avoid energy and water waste, ideal for single shower, kitchen faucet, bar, school, hospital, community and hair salon. Please verify it is the right size for you: 13kW at 240V(only); dimensions 11" (W) x 15.75" (H) x 2.25" (D); plumbing connections :1/2" NPT.
Bestseller No. 10
RINKMO Electric Tankless Water Heater 6KW Instant Hot On Demand Residential Electric Water Heater for Bathroom Bathtub rv Whole House Shower Sink Small
  • 🚿【TIPS】 Please notice that the 6KW tankless water heater requires 1 x 30 AMP breakers and 1 x 12 AWG wire, the Min. Water Flow is 0.4GPM/1.5L/min. The 11KW tankless water heater requires 2 x 30 AMP breakers and 2 x 12 AWG wire, and the Min. Water Flow is 0.4GPM/1.5L/min.
  • 🚿【Water & Electricity Separated More Safe And Clean】Heating water without directly contacting with the heating element which protects it from corrosion. No worry about water and electric leakage or tube explosion. RINKMO water heater Keeps you away form annoying tube cleaning work and expensive maintenance cost! This better design will reduce precipitation and extend the usage life.
  • 🚿【Save Money Save Cost】 After using our RINKMO high efficient water heater, you will find your water heating cost reduce up to 60%, due to our heater is 97% ~ 99.8% energy efficient. You can always get hot water within 3s.
  • 🚿【Compact Size Save Space Perfect For RV】RINKMO 6KW water heater is 10*12*3.125 inch and 7.7lbs weight which is only like a small suitcase, save your space and giving more to your living area. Easy to install and operation, set temp by turning the button, press the button to switch between Fahrenheit/ Celsius.
  • 🚿【Temp Protection & LED Alarm More Reassuring】 RINKMO water heater will stop heating when no water or low water flow to prevent the product from burning. The LED shows LL or HH alarm when the inlet water temperature is lower than 37℉ or higher than 167℉. All silicone wire design which is heat resisting, more reassuring and durable.
Are you looking for top 10 great on demand hot water heater for the money in 2021? After evaluating and analyzing in detail more than 43,123 customer satisfaction about top 10 best on demand hot water heater in 2021, we have come up with the top 10 rated products you may be interested in. We have ranked the best brands from Artificial Intelligent and Big Data, as you see below:

Our Best Choice: Tankless Water Heater, Gasland Outdoors Propane Water Heater 12L BS318 3.18GPM, Portable Hot Water Heater for Cabin & Barn, Camp Water Heater for RV, Overheating Protection, Easy to Install, White


Our rating:4.7 out of 5 stars (4.7 / 5)





Product Description

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THE MOST PROFESSIONAL TANKLESS WATER HEATER MANUFACTURER

Gasland Outdoors BS318 3.18GPM 12L outdoor portable tankless water heater has compact size and lightweight design allowing for a convenient carrying. Flame failure device, anti-freezing protection, over heating protection can ensure the family safety. Maximum power output 82,000BTU/Hr, low water pressure start up, just need 3.8 PSI of water pressure. The best solution for outdoor hot water, perfect for camping, RV life or anywhere you need hot water.

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PROTECTION OF FAMILY SAFETY

Flame failure device, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 3.8-110PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. High water temperature protection over 167 °F. Shut off gas supply automatically under unexpectable flameout.

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ON DEMAND HOT WATER, ENJOY BATH

Maximum power output 82,000BTU/Hr, get instant endless hot water easily wherever you are. No need to preheat before using tankless water heater. As soon as you turn on the tap, the water flows with your desired temperature. Low water pressure start up, just need 3.8 PSI of water pressure. 3.18 gallons per minute of on-demand hot water. Fully adjustable heat and water flow.

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COMPACT, LIGHTWEIGHT DESIGN

Compact size and lightweight design for easily carry. It can bring a amazing hot shower for you when you are camping, to the beach, etc. Also you can wash your pets with this tankless water heater in outdoor. Hang it using the mounting bracket on the top/back of the gas water heater. It only takes you a few minutes to install it. Or you can install it according to the instructions.

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SAVING ENERGY&MONEY

Compact and light weight structure with 11.5% energy saving technology. The propane water heater exchanger and main burner are desinged with advanced combustion technology to decrease gas consumption and burning noise. You will save a lot of money when you use our tankless water heater.

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WARM TIPS

√ 1、When install the water heater please do not over tighten the connectors and pipes to prevent it from bursting and leaking.

√ 2、The exhaust and top will get hot, please check around area for flammables, especially gasoline or other vapors which may ignite. Please make sure there are no foreign objects around the portable tankless water heater or have fallen into the top.

√ 3、A gas leak detection is needed before use and please do not use flame for leak detection. Soapy solution, gas detectors, etc. are recommended to detect leaks.

√ 4、Please use only liquid propane as fuel and use it in a well-ventilated place.

√ 5、Please make sure there is enough water pressure. If the water pressure is below 3.8 PSI, the water heater cannot be ignited.

√ 6、If the outside temperature is around or below freezing(0℃/32℉), please ensure to drain out the water after each use to avoid internal damage to the heat exchanger.

√ 7、This water heater is not suitable for high altitude areas over 3300 feet and strong wind conditions.

SUITABLE APPLICATIONS

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Outdoor Showers

Enjoying outdoor shower with endless hot water during camping trip.

On demand hot water

No need to preheat before using tankless water heater

Bathing Horses

Offering your horse with a relaxing shower in the afternoon.

Washing Dogs

Providing a comfortable sunbath for your pet dog.

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PACKING LIST

1 x BS318 portable gas hot water system.
1 x instruction manual in English.
1 x 5 feet CSA approval regulator & gas hose.
1 x garden hose fitting: 1/2″ BSP Female X 3/4″ GHT Male.
1 x garden hose fitting: 1/2″ BSP Female x 3/4″ GHT Female.
1 x gas inlet connector: 1/2″ BSP Female x 5/8″ NPT Inverted Flare Male.
1 x ON/OFF chrome shower head and pedestal, includes 5 feet shower hose.
1 x accessories package(fixing kits includes water tape, wood screws, washers).

EASY TO USE

1、Attach the 3/4″ GHT garden hose adapter to the fitting marked “water input” and the shower head to the “Water Outlet”.

2、Install gas supply line and regulator to the portable tankless water heater and attach gas regulator with hose to the LP cylinder.

3、Install two fresh “D” cell batteries with correct direction and turn on water supply.

4、Turn your water output device to its “off” position while the gas valve on the cylinder all the way open.

5、 Set the water knob(blue one) to its highest setting(left position) and the gas knob(red one) to its minimum setting(left position).

6、 Turn on your water output device to the “on” position and adjust to the desired water flow.

7、 Open the drain valve to ensure draining of water upon completion of use or storage and turn off your gas supply.

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KINDLY NOTE

Please make sure there is enough water pressure. If the water pressure is below 3.8 PSI, the water heater cannot be ignited.

When install the water heater please do not over tighten the connectors and pipes to prevent it from bursting and leaking.

🎁【Multiple Protection Functions】The Gasland propane water heater comes with flame failure device, anti-freezing protection, over heating protection to ensure the family safety. Automatically decrease water pressure between 3.8-110PSI. The anti-freezing drain plug can discharge the residual water to avoid freezing in cold areas or in case of long time no use. High water temperature protection over 167 °F. Shut off gas supply automatically under unexpectable flameout.
🎁【Portable Wall-Mounted Design】Portable design for carry on easily. It can bring a amazing hot shower for you when you are camping , to the beach, etc. Also you can wash your pets with this portable hot water heater in your garden. Hang it using the mounting bracket on the top/back of the propane water heater. It only takes you a few minutes to install it. Or you can install it according to the instructions.
🎁【On Demand Endless Hot Water】 Maximum power output 68,000btu/hour, get instant endless hot water easily wherever you are. No need to preheat before using RV camping water heater. As soon as you turn on the tap, the water flow with your desired temperature. Low water pressure 3.6 PSI start up. 3.18 gallons per minute of on-demand hot water. Fully adjustable heat and water flow.
🎁【Energy Saving】 Compact and light weight structure with 11.5% energy saving technology. The heat exchanger and main burner of the propane shower water heater are desinged with advanced combustion technology to decrease gas consumption and burning noise. It will help you save more when use Gasland tankless water heater.
🎁【Excellent Customer Service】We have professional team to offer you excellent service. If you have any question, please feel free to contact us from Monday to Friday.

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