20 Best On Demand Water Heater [2024]

Are you looking for the best on demand water heater ? Based on expert reviews, we ranked them. We've listed our top-ranked picks, including the top-selling on demand water heater .

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1 Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot... Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot...
2 Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self... Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self...
3 Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display... Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display...
4 Rinnai RL75iN Natural Gas Tankless Hot Water Heater, 7.5 GPM Rinnai RL75iN Natural Gas Tankless Hot Water Heater, 7.5 GPM
5 FMATOZ Mini Electric Tankless Water Heater 4000W 110V Constant Temperature Instant Hot Water Heater... FMATOZ Mini Electric Tankless Water Heater 4000W 110V Constant Temperature Instant Hot Water...
6 Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug... Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord...
7 Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5.5kW,Electric... Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5.5kW,Electric...
8 Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water... Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water...
9 Rinnai V65iP Non-Condensing Propane Tankless Water Heater, Indoor Installation, Up to 6.5 GPM Rinnai V65iP Non-Condensing Propane Tankless Water Heater, Indoor Installation, Up to 6.5 GPM
10 Tankless Water Heater Propane, GASLAND Outdoors 1.58GPM 6L Portable Gas Water Heater, On Demand... Tankless Water Heater Propane, GASLAND Outdoors 1.58GPM 6L Portable Gas Water Heater, On Demand...
11 LQWY Mini Electric Tankless Water Heater 3000W 110V Constant Temperature Instant Hot Water Heater... LQWY Mini Electric Tankless Water Heater 3000W 110V Constant Temperature Instant Hot Water Heater...
12 Camplux 2.64 GPM Portable Propane Water Heater, Tankless Propane Gas Water Heater with Digital... Camplux 2.64 GPM Portable Propane Water Heater, Tankless Propane Gas Water Heater with Digital...
13 Mini Electric Tankless Water Heater - 110V Small Instant Hot Water Heater,Under Sink Plug in Water... Mini Electric Tankless Water Heater - 110V Small Instant Hot Water Heater,Under Sink Plug in...
14 Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray Rheem RTEX-24 24kW 240V Electric Tankless Water Heater, Gray
15 Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water... Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water...
16 Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater,... Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water...
17 Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water... Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand...
18 TC-HOMENY 8L LPG Gas Tankless Water Heater 16KW Instant Propane Gas On Demand Boiler House TC-HOMENY 8L LPG Gas Tankless Water Heater 16KW Instant Propane Gas On Demand Boiler House
19 Electric Hot Water Heater, Fencia 110V 1500W 8L Electrical Hot Water Heater - Adjustable Temperature... Electric Hot Water Heater, Fencia 110V 1500W 8L Electrical Hot Water Heater - Adjustable...
20 Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water... Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water...
Bestseller No. 1
Bosch Electric Mini-Tank Water Heater Tronic 3000 T 2.5-Gallon (ES2.5) - Eliminate Time for Hot...
  • CONVENIENT HOT WATER HEATER: 2.5 gallon point-of-use mini-tank fits under your sink to provide hot water right where you need it. Thermal efficiency...
  • LONG LASTING QUALITY: This electric water heater is easy to maintain and has premium glass-lined material for a long service life. (Amps 12A, Volts...
  • INDEPENDENT INSTALLATION: 36-37" cord plugs into a 120 volt outlet for independent installation or in-line with a large hot water source
  • FAST RECOVERY RATE: Eliminates long waits for hot water at your sink, get on demand hot water at your every need (supplies up to 2 sinks at a time)
  • EASILY MOUNTED: Can be shelf, wall or floor mounted (bracket included); simply tap into the cold water line and install the water heater directly at...
Bestseller No. 2
Airthereal Electric Tankless Water Heater 18kW, 240Volts - Endless On-Demand Hot Water - Self...
  • ☟ Endless Hot Water: Imagine you are the last one in your family to take a shower before heading out for the day. You turn on the faucet and the...
  • ☟ Save Space: That water heater in the basement or utility closet takes up a ton of space. This wall-mounted water heater uses 90% less space than a...
  • ☟ Save Energy: Water is only heated when you need it, not stored in a hot water tank. The self-modulating temperature technology only uses energy to...
  • ☟ Important Note: In order to install 18kW Electric Tankless Water Heater it requires 240 Voltage, 2 x 40 AMP Circuit Breaker Size and a set of 2 x...
  • ☟ Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe,...
Bestseller No. 3
Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display...
  • 【On Demand Hot Water】Maximum power output 42,000btu/hour, get instant endless hot water easily wherever you are. No need to preheat before using...
  • 【CSA Approved Safety 】RUINOPAR Tankless Water Heater with CSA Approved Regulator, safe as per Canadian and US Standard.Automatically decrease...
  • 【Safety Protection】The safety of the propane water heater is also an important thing that everyone will value very much; Our products have more...
  • 【Lightweight Portable Design】Compact size and lightweight design for easily carry. It can bring a amazing hot shower for you when you are camping...
  • 【Energy Saving】With automatic ignition and flameout modes, when you turn on the shower nozzle, the tankless water heater automatically ignites,...
SaleBestseller No. 4
Rinnai RL75iN Natural Gas Tankless Hot Water Heater, 7.5 GPM
  • Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in...
  • Never Run Out of Hot Water with this Compact Tankless Gas Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a...
  • Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger,...
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your...
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for...
Bestseller No. 5
FMATOZ Mini Electric Tankless Water Heater 4000W 110V Constant Temperature Instant Hot Water Heater...
  • INSTANT HOT WATER HEATER - Applied with 5500W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot...
  • REMOTE CONTROL OR TOUCH SCREEN - Ultra slim and smooth appearance design, beautiful and elegant. The temperature can be adjusted by remote control and...
  • SAVE SPACE AND ENERGY - Compact design, our tankless Hot Water Heater is only the size of a small suitcase, and the wall-mount design frees up...
  • EASY TO INSTALL - The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow or...
  • SAFE TO USE - With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe,...
Bestseller No. 6
Camplux Pro ME25B Mini Tank Electric Water Heater On-demand Water Heater 2.5 Gallon with Cord Plug...
  • EASY TO USE-43.3'' cord plugs into 120 volt outlet for independent installation or in-line with a large hot water source.(Max. water pressure is 150...
  • MULTIPURPOSE - Can be shelf, wall or floor mounted; Simply tap into the cold water line and install the water heater directly at the sink to provide...
  • SWEET PROTECTION - Thermostat Control allows adjustment of water temperature. High Limit device provide protection while overheating.
  • HIGH QUALITY & LONG LAST-Electric water heater is easy to maintain and has glass-lined tank for long service life.
  • CONVENIENT HOT WATER - 2.5 gallon Pro mini-tank fits under your sink to provide hot water right where you need it.
Bestseller No. 7
Tankless Water Heater Electric 240V, On Demand Hot Water Heater Digital Display 5.5kW,Electric...
  • 【INSTANT & SUFFICIENT HOT WATER】Applied with 5.5KW heating system, the electric water heater supplies instant, consistent and endless hot water of...
  • 【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...
  • 【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...
  • 【SAFE and DURABLE】Applied with multiple protection devices, every piece goes through strict tests to ensure 100% safe. Inner water and electricity...
  • 【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...
Bestseller No. 8
Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170000 BTU White Instant Hot Water...
  • We recommend that all installations of units must be done in accordance with the local building and plumbing codes of the installation location and...
  • The tankless design means you don't have to wait 30 minutes for preheating and unlimited use of hot water.
  • 170,000 BTU high heating capacity and maximum 7.5 GPM. It is suitable for 3-4 outlet points, which can satisfy whole family. UEF over 0.82, the high...
  • Excellent quality CSA certified in the United States and Canada. Adopting the world's most advanced technology, superior safety and durability.
  • Using built in forced exhaust fan at the bottom ensures stable combustion and eliminates the influence of external wind. Compact design for easy...
Bestseller No. 9
Rinnai V65iP Non-Condensing Propane Tankless Water Heater, Indoor Installation, Up to 6.5 GPM
  • Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner...
  • Never Run Out of Hot Water with this Compact Propane Water Heater: Non-condensing tankless hot water heater from Rinnai is only the size of a small...
  • Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee...
  • Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your...
  • Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for...
SaleBestseller No. 10
Tankless Water Heater Propane, GASLAND Outdoors 1.58GPM 6L Portable Gas Water Heater, On Demand...
  • 🏄‍♂【CSA Approved】CSA approved Gasland tankless water heater, safe as per Canadian and US Standard. Flame failure device, anti-freezing...
  • 🏄‍♂【On Demand Hot Water】 Maximum power output 41,000btu/hour, get instant endless hot water easily wherever you are. No need to preheat...
  • 🏄‍♂【Energy Saving】 Compact and light weight structure with 11.5% energy saving technology. The propane water heater exchanger and main...
  • 🏄‍♂【Lightweight Portable Design】 Compact size and lightweight design for easily carry. It can bring a amazing hot shower for you when you...
  • ♂【Important Tips】To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas...
Bestseller No. 11
LQWY Mini Electric Tankless Water Heater 3000W 110V Constant Temperature Instant Hot Water Heater...
  • INSTANT HOT WATER HEATER - Applied with 5500W heating system, the electric tankless water heater supplies instant hot water, 3 seconds to get hot...
  • REMOTE CONTROL OR TOUCH SCREEN - Ultra slim and smooth appearance design, beautiful and elegant. The temperature can be adjusted by remote control and...
  • SAVE SPACE AND ENERGY - Compact design, our tankless Hot Water Heater is only the size of a small suitcase, and the wall-mount design frees up...
  • EASY TO INSTALL - The home water heater has a mini body, easy to install in the bathroom, kitchen, and under the sink.Standard 1/2 interface(inflow or...
  • SAFE TO USE - With high temp protection, dry heating protection, and electrical leakage protection you can rest easily knowing you have safe,...
Bestseller No. 12
Camplux 2.64 GPM Portable Propane Water Heater, Tankless Propane Gas Water Heater with Digital...
  • 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...
  • 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...
  • Multiple Protection Ensure Your Safety-Flame failure device, anti-freezing protection, over heating protection to ensure the family safety. The...
  • Power Efficient & Energey Saving -Maximum power output 68,000btu/hour, you will get instant endless hot water easily wherever you are. Compact and...
  • 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...
Bestseller No. 14
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. 15
Tankless Natural Gas Water Heater, Camplux 6.86 GPM Gas Tankless Water Heater, On Demand Water...
  • 6.86 GPM Instant Constant Hot Water- Camplux 26 litre tankless water heater is powered by 120 VAC voltage, features imported PCB with precise...
  • Convenient, Easy Installation-6.86 GPM hot water is activated by water flow rather than water pressure,automatically activates on water pressure...
  • S/S Burner, Thermal Efficiency Up to 89.98%-The tankless gas water heater comes with CSA certified balanced combustion design, v-type stainless steel...
  • Direct-Current Frequency Conversion Fan-The gas water heater comes with a direct-current frequency conversion fan. The water heater can resist level 8...
  • Considerate Anti-Scalding Protection-The tankless water heater equipped with anti-scalding function to avoid the problem of excessively high setting...
Bestseller No. 16
Tankless Water Heater Electric 27kW 240 Volt, thermomate On Demand Instant Endless Hot Water Heater,...
  • [Instant Unlimited Hot Water] - REQUIRE 3 SET x Double-pole 40AMP Breakers to Achieve 240V for this On demand tankless electric water heater,...
  • [Self-modulating Power] - Self-modulating technology regulating the amount of energy required to heat water only when you need it with 99.8%...
  • [Stable Water Temperature] - Auto adjusting energy consumption basing on income water temperature and flow, ensuring maximum efficiency, continuous...
  • [Easy Installation & Safety Protection] - ETL certified with overheating protection, auto stop heating when detecting no water, quality workmanship...
  • NOTE - Make sure this water heater is the correct size for your hot water need: 27kW at 240V draw max 114Amp; Required breaker 3 x Double-POLE 40AMP;...
SaleBestseller No. 17
Seeutek Portable Water Heater 1.6GPM/6L, Outdoor Propane Gas Tankless Water Heater, On Demand Water...
  • 🏝️Product Parameters: Applicable Water Pressure Range: 3.0-145 PSI; Maximum Power Output: 41,000btu/Hr; Water Output Per Minute:1.6GPM/6L; Item...
  • 🏝️Excellent Performance:【Instant hot water】: Instant and continuous supply of hot water whenever you need it.【High efficiency and energy...
  • 🏝️CSA Safety Certification: Our propane water heater have multiple safety protection settings and have been CSA certified for safety. For...
  • 🏝️Convenient and Durable: Our tankless water heater are lightweight and portable, with a portable handle for easy carrying and hanging for...
  • 🏝️Multi-scene Application: This instant water heater is suitable for outdoor shower in various scenarios, such as RV shower, outdoor camping, pet...
Bestseller No. 18
TC-HOMENY 8L LPG Gas Tankless Water Heater 16KW Instant Propane Gas On Demand Boiler House
  • Gas Type: LPG Liquid Petroleum Gas (PROPANE), Capacity:8L/min (2Gal), Thermal input: 16KW, 25 degrees warm water producing rate, SIZE: 12.6"(L)...
  • Working temperature:-8-45℃, Thermal efficiency: ≥80%, Cover Material: Cold Rolled Sheet, batteries reqiured: 2 pcs D size batteries
  • Temperature rise: 25℃, Minimum working water pressure: 0.025MPa (working pressure: 0.025 MPa ~ 0.8 MPa), Gas pressure: 2800Pa
  • Gas pipe: G 1/2", Water Inlet: G1/2'', Water Outlet: G1/2", with two season modes (winter and summer) to choose.
  • Automatic ignition system, Flame failure protection device,20 min. off self-timer,Gross weight: 7.7KG
Bestseller No. 19
Electric Hot Water Heater, Fencia 110V 1500W 8L Electrical Hot Water Heater - Adjustable Temperature...
  • 🍀 PREMIUM QUALITY AND GREEN SAFE MATERIAL:Our Water Heater is made of high quality plastic and metal material, it is is a lightweight electric...
  • 🍀 HIGH EFFICIENCY ENERGY SAVING:It is a directly heating type with high efficiency and low power heating tube, which can take advantage of the...
  • 🍀 APPLICATION ADN SUITABLE:Its total power is 1500w and it has multiple installation methods. It is applicable for different water pressure of...
  • 🍀 AUTOMATIC DESIGN:The temperature can be adjusted between 55℃-75℃ optionally, and the power will be off automatically when the set...
  • 🍀 NEED YOUR ATTENTION: 1.This water heater needs to be installed by itself or repairman. Be sure to use waterproof tape to avoid leaking.// 2.The...
SaleBestseller No. 20
Tankless Water Heater Electric, thermomate 3.5kW 120V Hard Wired Point of Use On Demand Hot Water...
  • Instant Heating - 24 hours ready to continuously supply instantaneous hot/warm water at preset temperature throughout your home only when needed. NO...
  • Space Savings - 7.8W×6.3H×3.9D inch, compact small Point of Use water heater designed for Single Sink use, wall mounted fitting in small spaces...
  • Self Modulating - On demand water heater automatically adjust the power based on the change of inlet water flow and temperature, saving up to 50%...
  • Safe & Healthy - ETL certified and equipped with Multiple Protection from leakage, dry fire, over-heating and over pressure. IP25 waterproof....
  • User Friendly - Touch control panel and digital temperature display, easy to set your desired temp. Lightweight and easy to install vertically facing...

Having trouble finding a great on demand water heater ?

This problem is well understood by us because we have gone through the entire on demand water heater research process ourselves, which is why we have put together a comprehensive list of the best on demand water heater s available in the market today.

After hours of searching and using all the models on the market, we have found the best on demand water heater for 2023. See our ranking below!

How Do You Buy The Best On Demand Water Heater ?

Do you get stressed out thinking about shopping for a great on demand water heater ? Do doubts keep creeping into your mind?

We understand, because we’ve already gone through the whole process of researching on demand water heater , which is why we have assembled a comprehensive list of the greatest on demand water heater available in the current market. We’ve also come up with a list of questions that you probably have yourself.

John Harvards has done the best we can with our thoughts and recommendations, but it’s still crucial that you do thorough research on your own for on demand water heater that you consider buying. Your questions might include the following:

  • Is it worth buying an on demand water heater ?
  • What benefits are there with buying an on demand water heater ?
  • What factors deserve consideration when shopping for an effective on demand water heater ?
  • Why is it crucial to invest in any on demand water heater , much less the best one?
  • Which on demand water heater are good in the current market?
  • Where can you find information like this about on demand water heater ?

We’re convinced that you likely have far more questions than just these regarding on demand water heater , and the only real way to satisfy your need for knowledge is to get information from as many reputable online sources as you possibly can.

Potential sources can include buying guides for on demand water heater , rating websites, word-of-mouth testimonials, online forums, and product reviews. Thorough and mindful research is crucial to making sure you get your hands on the best-possible on demand water heater . Make sure that you are only using trustworthy and credible websites and sources.

John Harvards provides an on demand water heater buying guide, and the information is totally objective and authentic. We employ both AI and big data in proofreading the collected information.

How did we create this buying guide? We did it using a custom-created selection of algorithms that lets us manifest a top-10 list of the best available on demand water heater currently available on the market.

This technology we use to assemble our list depends on a variety of factors, including but not limited to the following:

  1. Brand Value: Every brand of on demand water heater has a value all its own. Most brands offer some sort of unique selling proposition that’s supposed to bring something different to the table than their competitors.
  2. Features: What bells and whistles matter for an on demand water heater ?
  3. Specifications: How powerful they are can be measured.
  4. Product Value: This simply is how much bang for the buck you get from your on demand water heater .
  5. Customer Ratings: Number ratings grade on demand water heater objectively.
  6. Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their on demand water heater .
  7. Product Quality: You don’t always get what you pay for with an on demand water heater , sometimes less, and sometimes more.
  8. Product Reliability: How sturdy and durable an on demand water heater is should be an indication of how long it will work out for you.

John Harvards always remembers that maintaining on demand water heater information to stay current is a top priority, which is why we are constantly updating our websites. Learn more about us using online sources.

If you think that anything we present here regarding on demand water heater is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly!

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