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Top 10 Best on demand hot water heater Reviews

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

Bestseller No. 1
Rinnai V75iN Natural Gas Tankless Hot Water Heater, 7.5 GPM, 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 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
Bestseller No. 2
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”
Bestseller No. 3
Fogatti Tankless Water Heater Propane On Demand Water Heater Outdoor, Instant Hot Water Heater For 3-4 Persons Whole House, 4.5 GPM, 180,000 BTU, 120V AC, White
  • [On Demand Hot Water] The tankless propane water heater outdoor heats water instantly with 180,000 BTU, enjoy a comfortable shower without waiting, save your valuable time, energy and water. The capacity is up to 4.5 GPM, perfect for whole house use of 3-4 persons.
  • [Continuous Hot Water] The Fogatti tankless propane outdoor hot water heater is able to meet all of your hot water needs. No longer do you need to choose between a comfy shower, dish wash and laundry. The propane tankless hot water heaters deliveries endless hot water and keeps everyone happy.
  • [Easy To Install] The Fogatti outdoor tankless water heater uses standard 3/4" NPT water fittings for convenient and quick installation. It’s for outdoor installation only so no smoke venting pipe is needed, and no drilling holes on the wall. It’s using liquid propane gas tank as fuel, that makes installation locations very flexible: outside the garage, bathroom or kitchen, by the pool, in the garden, or anywhere you like outside the house.
  • [Safety & Excellent Quality] The tankless propane water heater features multi safety protections: Overheat protection, Flame Failure Protection, Low Water Flow Protection, High Water Pressure Protection, Dry combustion Production and Anti-freeze Protection. It’s waterproof and windproof, anti-exposure, designed for outdoor installation.
  • [Save Space and Energy] Compact design, The Fogatti tankless water heater is installed outside your house, frees up valuable floor space within your home. The burner is manufactured using the latest European technology, high efficiency and energy saving. And the Heat Exchanger is made of oxygen-free copper, highly efficient and durable. It includes a digital remote controller with a 25 feet long cable, heats water only when you need it and saves on energy costs from day one.
Bestseller No. 4
Propane Tankless Water Heater On Demand Hot Water Heater Indoor for 3-4 Persons Home Use, 4.2 GPM, 170,000 BTU,120V AC, White
  • 【Instant Water Heater】High efficiency whole house tankless water heater propane, Enjoy a comfortable shower without waiting, the continuous water heater tankless propane provides you with hot water instantly, save your valuable time, as well as energy and water.
  • 【Endless Hot Water】Propane tankless water heater indoor is able to meet all of your hot water needs. No longer do you need to choose between a hot shower, dish washing and laundry. The Fogatti tankless water heater will never run out of hot water and keep everyone happy.
  • 【Easy To Install 】Use standard 3/4" NPT water fittings and φ3" Vent Pipe for convenient and quick installation. Indoor tankless water heater propane works under low water pressure, great for all locations including total home, high buildings, apartments, or cabins, etc.
  • 【Safety & Excellent Quality】 CSA certified. The burner is manufactured by the same factory that produces popular brands sold globally, using the latest European technology, high efficiency and energy saving, The Heat Exchanger is made of oxygen-free copper, efficient and durable;According to DOE test standard, the capacity is up to 4.2 GPM @ 67℉ Temperature Rise(Equivalent to 6.2 GPM with a 45℉ temp Rise). Auto cut-off & anti-dry burning protection.
  • 【Safety & Excellent Quality】 CSA certified. The burner is manufactured by the same factory that produces popular brands sold globally, using the latest European technology, high efficiency and energy saving, The Heat Exchanger is made of oxygen-free copper, efficient and durable;According to DOE test standard, the capacity is up to 4.2 GPM @ 67℉ Temperature Rise(Equivalent to 6.2 GPM with a 45℉ temp Rise). Auto cut-off & anti-dry burning protection.
Bestseller No. 5
Camplux Propane On Demand Instant Hot Water Heaters Gas Tankless Water Heater Indoor, 6.86 GPM, 120v AC, Gray
  • 6.86 GPM Instant Water Heater.Camplux 26 litre propane hot water heater is powered by 120V AC voltage, features imported PCB with precise temperature control, never blow hot and cold in turn, making it perfect for on-demand hot shower at home. The gas water heater produce a quick endless hot shower for whole house.
  • Convenient, Easy Installation. 6.86 GPM hot water is activated by water flow rather than water pressure,automatically activates on water pressure between 7.0-150 PSI. Minimum activation rate: 0.65 GPM; Maximum input rating: 180,000 BTUs;Water connection location/size: Bottom/ 3/4 inch NPT .
  • Direct-Current Frequency Conversion Fan.The propane tankless water heater comes with a direct-current frequency conversion fan. The instant hot water heater can resist level 8 strong wind resistance and you no need to worry about the water pressure in high floors.
  • S/S Burner, Thermal Efficiency Up to 89.98%. The tankless hot water heater comes with CSA certified balanced combustion design, v-type stainless steel burner,high heating efficiency up to 89.98 %; PCB frequency conversion and temperature intelligent control, environmental protection and durability. This residential constant water heater saves time, money and energy while producing safe, endless hot water for whole home.
  • Considerate Anti-Scalding Protection.The propane gas water heater equipped with anti-scalding function to avoid the problem of excessively high setting temperature (causing burns ) caused by children's wrong operation.Therefore, it is impossible to set a temperature exceeding 122 ℉ under normal working conditions. The water valve needs to be closed to make the water heater in standby status before you set the temperature above 122 ℉.
Bestseller No. 6
Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
  • ON/OFF Dial Control with adjustable digital temperature display
  • Self-modulating power control
  • 24kW Model Flow Rate: up to 5.9 GPM for RTEX-24
  • Bottom 3/4" NPT water connections
  • On demand, consistent and continuous hot water
Bestseller No. 7
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.
Bestseller No. 8
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. 9
Camplux CA528 5.28 GPM Tankless Propane Instant Hot Water Heater, Indoor, Gray
  • 【Enjoy & Comfortable Constant Hot Water】This residential model is powered by 120 VAC voltage, features imported PCB with precise temperature control, never blow hot and cold in turn, on-demand hot water, double adjustment of water and air, and rising of the third gear making it perfect for a hot shower at home!Camplux CA528 can produce a quick endless hot shower for years to come! Please take the Camplux customized vent pipe CP-70 together for better performance.
  • Advanced Safety Features-CSA certified balanced combustion design required air combustion from the outdoor and the combustion city produced by the smoke forced out of the outdoor to ensure fresh indoor air, safe and reliable use. Features CO multiple protection ensures safety, equipped with PCB start up self-test &real-time intelligent monitoring, timely warning of potential gas fire and hydro power to ensure your family's safety. Automatically activates on water pressure between 7.0-150 PSI.
  • Smart& Energy Saving-PCB frequency conversion intelligent control, temperature intelligent adjustment, environmental protection and durability, truly outstanding energy saving. Man-machine dialogue, heating without waiting. This residential constant model saves time, money and energy while producing safe, endless hot water for whole home!
  • High Thermal Efficiency & High-Rise Wind Resistance-Phosphorus deoxidized copper heat exchanger with high temperature and corrosion resistance technology for full combustion and high thermal efficiency up to 92% . It can resist grade 8 wind speed and 240Pa high anti-wind pressure. Additionally, a wind pressure sensor is added to perceive the external wind force in real time and automatically adjust the fan, flame and maintain stable combustion.
  • Considerate Customer Service-Here at Camplux, customer service is everything! We offer 24 shift hours customer service make the customer experience easy and fast through our live chat, phone support & our online helpdesk. Have a question? Give us a call at (844) 538-7475.
Bestseller No. 10
Tankless Water Heater, Camplux Constant Propane Water Heater, 3.18 GPM On Demand Water Heater, Instant Hot Water Heater, Indoor, Black
  • 3.18 GPM Instant Constant Water Heater -Camplux 3.18 GPM propane tankless water heater 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.
  • Easy Installation -The tankless propane water heater uses standard 1/2" NPT water fitting and gas inlet. The gas water heater comes with 2.3" horizontal vent pipe for convenient and quick installation,great for whole home,small cabins and remote apartments use. You can take S/S wall thimble-WT236 for perfect indoor use. You will need a gas regulator ( Camplux model KR-106A )& 1 pc 5/8" NPT male to 1/2" BSP female gas connector adapter if you want to hook this water heater up to a propane tank.
  • Modern Design,Easy Operation -The tankless hot water heater has 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 water heater saves more space than traditional tanks.
  • Outstanding Features- The propane instant hot 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 propane 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.
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)





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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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