20 Best Tankless Water Heaters of 2023 – Romance University

After hours researching and comparing all models on the market, Romance University finds out the Best Tankless Water Heaters of 2023. Check our ranking below.

2,599 Reviews Scanned

SaleRank No. #1

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.Amperage Draw : 54 A.Special Features: ‎Energy Efficient
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

SaleRank No. #2

Rinnai V94XiN Natural Gas Tankless Water Heater with Space-Saving Design and Smart Features, Indoor Installation, 9.8 GPM

Endless Hot Water: Our tankless hot water heaters let you enjoy unlimited hot water flow throughout the house with a compact and durable design that fits your home and lifestyle
Energy and Space Efficient Tankless Gas Water Heater: This small hot water heater conserves energy, only heating when necessary; Enhanced scale detection lessens possibility of serious, long-term damage to unit
Optimal Water Pressure: This tankless water heater offers a high-performance hot water flow rate up to 9.8 GPM for a powerful, constant stream that serves up to 6 appliances at once
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Guaranteed to Last: 10-, 5-, and 1-year residential factory warranty for heat exchanger, labor, and parts, respectively

Rank No. #3

Rinnai RL94IN Tankless Hot Water Heater, 9.8 GPM, Natural Gas, Indoor Installation

Original Design: Tankless hot water heater's Circ-Logic technology offers recirculation patterns that match your habits; For the latest in non-condensing technology that speeds up service and installation, check out our new RE180iN model
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 small suitcase and fits in a wide variety of spaces, but provides up to 9.8 GPM (6 fixtures at once)
Smart, Durable Design: Includes 12-, 5-, and 1-year residential guarantee and 5-, 5-, and 1-year commercial factory warranty for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Rank No. #4

Rheem 18kW 240V Tankless Electric Water Heater

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

SaleRank No. #5

Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heaters, White

Whole home indoor, gas powered tankless water heater, rated at 3.6 GPM that activates only when in use, making it an energy saver.
For indoor installation with safe, efficient power ventilation and perfect for any small home, cabin or apartment.
Easy to read digital temperature display, on a compact and space-saving design with minimal noise output.
Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord.
Uses standard 1/2" NPT water fittings and is equipped with easy to use manual water temperature controls.Minimum 0.65 GPM flow rate

SaleRank No. #6

Ecosmart POU 3.5 Point of Use Electric Tankless Water Heater, 3.5KW@120-Volt, 6 x 11 x 3 Inch

Can provide hot water for one sink at 0.5 GPM in warmer climates
Requires 1 x 30 amp breaker and 10 AWG wire
For one sink at 0.5 GPM in colder climates the POU 6 is recommended
Amperage Draw 29 amp. kW - 3.5 kW
Connection Fittings 1/2" NPT

Rank No. #7

Portable Water Heater Propane Tankless - 6L 1.58GPM RV on demand Hot Gas Outdoor Digital Display Water Heater for Camping,Boat,Cabins(black)

【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 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 2.5 PSI of water pressure. 1.58 gallons per minute of on-demand hot water. Fully adjustable heat and water flow.
【CSA Approved Safety 】RUINOPAR Tankless Water Heater with CSA Approved Regulator, safe as per Canadian and US Standard.Automatically decrease water pressure between 2.5-145PSI. 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.
【Safety Protection】The safety of the propane water heater is also an important thing that everyone will value very much; Our products have more than 6 protection methods; The product has safety protection that measures such as overheating protection, antifreeze protection, flame-out protection, anti-dry protection, high water pressure protection and low water flow protection, which prevent the product from doing harm to users,providing a comfortable and safe bathing conditions, reliable product.
【Lightweight Portable 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. Using the handle of the gas water heater or the mounting bracket on the back to hang it. It only takes you a few minutes to install it.
【Energy Saving】With automatic ignition and flameout modes, when you turn on the shower nozzle, the tankless water heater automatically ignites, and when you turn off the shower nozzle, the water heater automatically put out the flame; With this unique design, our heater can save 11.5% energy for you and ensure your safety at the same time.

Rank No. #8

EcoSmart ECO 18 Electric Tankless Water Heater, 18 KW at 240 Volts with Patented Self Modulating Technology , 17 x 14 x 3.5

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

SaleRank No. #9

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

Rank No. #10

Navien 199,000 BTU, 0.95 UEF, 11.2 GPM Maximum Flow Rate, High-Efficiency, Natural Gas, Condensing Tankless Water Heater NPE-240A2

This bundle includes a NPE-240A2 tankless water heater and LP conversion kit. The NPE-A2 line of water heaters are so efficient that they outperform much larger capacity non-condensing competitors.
More output for the money, lower installation costs, and lower operating costs for customers make the NPE-240A2 the best choice for your next installation.
The NPE-240A2 can be cascaded with up to 32 units with Ready-Link technology. When a unit gets up to 80% capacity the next unit will turn on to help meet requirements. The cascading system balances out the workload of each unit for longer life.
Up to 12 units can share a vent reducing building penetrations using the common venting feature.
This unit comes with a 1-year labor, 3-year parts, and 5-year heat exchanger limited manufacturer’s warranty from defects arising out of the manufacturing process.

Rank No. #11

Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

Energy Efficient Continuous Hot Water for the Whole Home
Low operating cost - High energy efficiency and water savings setting
Space Savings - Compact, space-saving design. Perfect for a tank replacement.
Water & Gas Leak Detection will shut down unit and provide an error code
For use indoor only

SaleRank No. #12

Rinnai V65iN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation

Original Design: Tankless hot water heater only heats when necessary to conserve energy; For the latest in non-condensing technology and a cleaner layout that speeds up service and installation, check out our new RE160iN model
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 small suitcase and fits in a wide variety of spaces, but provides up to 6.5 GPM (5 fixtures at once)
Smart, Durable Design: Enhanced scale detection helps prevent serious, long-term damage to unit; Includes 15-, 5-, and 1-year residential guarantee for heat exchanger, labor, and parts, respectively; See Controlr module for WiFi control (not included)
Professional Installation Recommended: Visit the Find a Rinnai PRO page on our website to locate a qualified technician in your area to install your tankless water heater; We do not recommend installing a water heater without a technician
Find Your Rinnai: See our product guides, manuals, energy guide, warranty information, videos, and tables to find the right tankless water heater for your home; Check our Ground Water Temperature Map to see if this heater is optimal for your region

Rank No. #13

Ecosmart ECO 24 24 KW at 240-Volt Electric Tankless Water Heater with Patented Self Modulating Technology, 17 x 17 x 3.5

Sleek and compact design with digital output temperature display
ECOSMART tankless water heaters are 99.8-percent energy efficient
Manufactured in United States
100 A

Rank No. #14

Instant Electric Tankless Water Heater 220/240V，Small Smart Water Heater Self-Modulating No Standby Losses，Under Sink Kitchen Household Shower, Hot Water Output of 2.0 GPM (White 7KW)

NOTE: Since each product has been quality tested before leaving the factory, a small amount of water remains inside each water heater!Please rest assured，If there is any problem with the product, you can contact us, customer service 24 hours online service.
【ENDLESS WATER HEATER】3 seconds to get hot water without preheating. Instant consistent and endless hot water of the maximum temperature reach to 131 ℉. Tankless electric water heater on demand suits for sinks and bathroom( meet bathing needs except extremely cold winter such as 28℉).
【SMART INVERTER FOR ENERGY SAVING】The hot water heater built-in smart chip to scientifically calculate the minimum required power based on the water flow and temperature thus costing less energy and money. Save up to 90%. The water flow rate and temp is stable under chip's control.
【SAFE DURABLE & LONGEVITY】Multiple safety protection functions protect you from the risk of scald, leakage or other injury. Premium PE shell is corrosion resistant, high-grade and easy to wipe. This mini hot water heater is ideal for kitchen, bathroom, bar, school, hospital, community and hair salon.
【EASY TO USE】 The electric tankless water heater comes with digital display & Remote control settings & touch control panel for visual setting. Accessories are complete for quick installation without additional expenses or preparing time of accessories.

Rank No. #15

Rheem RTG-70XLP-1 Tankless Water Heater, Grey, Grey

Continuous Hot Water – never run out of hot water, even with back-to-back showers
Tankless Gas Water Heaters are cost saving and energy efficient
Reduces Energy Consumption - Automatically adjusts the amount of energy required to heat the water you need
Easy, Convenient Control –Easily adjust water temperature ranging from 85˚F–140˚F
For use outdoor with freeze protection up to -30 degrees

Rank No. #16

Tankless Water Heater Electric 3000W LED Display With Remote Control Instant Hot Water Heater Electric Suitable For Home Kitchen Bathroom BLACK

【Tips】 The instant hot water heater does not store water (Water Temperature Range: 35-50℃).The outlet water temperature depends on the inlet water temperature and water flow. The larger the water flow, the lower the temperature, the smaller the water flow, the higher the temperature.
【Instant Heating】Voltage:AC 110V;Wire Requirements:2.08mm² Copper wire (#14 awg wire); Trip switch:≥32A(Otherwise it will trip).24 hours ready to continuously supply instantaneous hot/warm water.NO standby energy consumption. NO wait for tank to fill up.
【Easy to Use】The upgraded tankless water heater electric can be controlled by remote control and button,and the operation is simple and free to adjust the temperature.Lightweight and easy to install vertically facing up or down. Small and exquisite water heater saves space,installation and disassembly simple.
【Energy Saving】Tankless water heater can only be heated when you need it. There is no hot water tank,which will save 50%of water than ordinary water heaters, but Its heating temperature will also be much lower than that of ordinary water heaters. In winter, it may only meet the needs of our kitchen.
【NOTICE】The water heater need a larger than 32 amps circuit breaker; the outlet water temperature won't very hot because the water heater just 3KW, so it can't be used to bath , it can be use to wash hand or use in kitchen.Please check whether the wire specifications.If you feel that the water heater is not heating up to your preferred temperature, try waiting longer or reducing the water flow.

SaleRank No. #17

EcoSmart ECO 8 Tankless Water Heater, Electric, 8-kW - Quantity 1, 12 x 8 x 4

The product is highly durable
The product is easy to use
Manufactured in China

Rank No. #18

Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

【Tankless Instant Hot Water Heater】No need to preheat before using the tankless water heater. As soon as you turn on the tap, the water ﬂows with your desired temperature.The screws for the water pipe joint and gas inlet are G1/2", and we provide a 3/4NPT adapter.
【High Sensitive Touch Led Display】Comes with smart digital LED display high-definition large screen, freely adjustable the temperature between 30℃-65℃.
【Multiple Security Protection】The natural gas water heater is upgraded with 12 protection methods to ensure your safety. Such as dry burning protection, over 65℃(149 °F) protection, leakage protection, etc.Note: When the temperature is below 32 degrees Fahrenheit, please drain the remaining water in the water heater at any time after use to prevent the exchanger or water pipes from freezing and bursting. Please refer to the manual for details.
【Energy and Money Saving】The hot water heater adjusts power input based on flow rate and temp setting in real time. Summer/winter 2 modes to save up to 60% on your natural gas costs.
【Quality Material】Made with brushed stainless steel material, the natural gas water heater has the function of high temperature resistance, corrosion resistance. Built-in oxygen-free copper water tank, long service time.Note: This product must be installed with a ventilation and smoke exhaust pipe for normal use.

Rank No. #19

Airthereal Electric Tankless Water Heater, 8kW, 240 Volts - Endless On-Demand Hot Water - Self Modulates to Save Energy - Use for Faucet and Sink, Evening Tide series

☼ Instant Hot Water: The 8kW electric tankless water heater supplies instant & endless hot water of 108℉ or higher with no waiting for preheating or temperature fluctuations. perfect companion for faucet and sinks, bringing you perfect experience of comfort and relaxing.
☼ 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 heat up water while you are using it to save up to 50% on water heating energy compared to a typical tank water heater.
☼ Save Space: A traditional 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 hot water heater with a tank. Compared to our next-largest 9kW water heater, this 8kW unit is 30% smaller with only 3,412 BTUs.
☼ Important Note: In order to install 8kW Electric Tankless Water Heater, it will require a 240 Voltage, 40 AMP circuit breaker. Please check to confirm that your breaker panel meets these specifications before purchasing.
☼ Safe To Use: With high temp protection, dry heating protection, and electrical leakage protection you can rest easy knowing you have safe, on-demand hot water to use on your schedule. The electric and fluid systems are completely separated to prevent electric leakage and water pipe corrosion.

Rank No. #20

FOGATTI RV Tankless Water Heater, InstaShower 8 Plus, Gen 2, with 15 x 15 inches White Door and Remote Controller, DC 12V, Best High Altitude Performance, Ideal for RVers' Everyday Use

【Unprecedented experience】The high altitude suitability mode allows the machine to run smoothly even when driving the caravan to the high Denver plateau at 9,800 feet. Staged combustion technology, which controls the amount of flame in summer, prevents the water from getting too hot and saves the limited propane gas available for caravan travel.
【All RV water heaters can be replaced】The Fogatti RV water heater have a wide range of applications. The opening is 13 x 13 inches and the door is 15 x 15 inches. It can replace Suburban and Atwood's 6 gallons tank water heaters, as well as Girard and Furrion's tankless water heaters. If you previously used a 10 gallons tank water heater, it would need to be retrofitted with an 18 x 18 inches door.
【Incessant hot water】With 55,000 BTU of power, it can produce a maximum of 2.9 GPM of hot water. Some tank heaters can only store up to 6-10 gallons of hot water and run out of hot water in 5-8 minutes, whereas our hot water supply lasts over 40 minutes.
【No waiting】RV tankless water heaters are taking off. Tankless water heaters are better than tanked water heaters for continuous showering of multiple people. There is no need to waste 20-30 minutes waiting for hot water in the middle of the shower, so you can enjoy hot water at all times. It uses propane for heating, so there is no need to worry about running out of power in your caravan.
【Save money and trouble】Fogatti has always thought of you, with a pressure relief valve built into the product, so you don't have to buy and install it separately. And it also comes with a 15 x 15 inches door and an intelligent remote controller up to 2 meters long.

Last update on 2023-08-03 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Tankless Water Heaters?

Do you get stressed out thinking about shopping for a great Tankless Water Heaters? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Tankless Water Heaters, which is why we have assembled a comprehensive list of the greatest Tankless Water Heaters available in the current market. We’ve also come up with a list of questions that you probably have yourself.

Romance University 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 Tankless Water Heaters that you consider buying. Your questions might include the following:

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

We’re convinced that you likely have far more questions than just these regarding Tankless Water Heaters, 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 Tankless Water Heaters, 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 Tankless Water Heaters. Make sure that you are only using trustworthy and credible websites and sources.

Romance University provides an Tankless Water Heaters 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 Tankless Water Heaters 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:

Brand Value: Every brand of Tankless Water Heaters 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.
Features: What bells and whistles matter for an Tankless Water Heaters?
Specifications: How powerful they are can be measured.
Product Value: This simply is how much bang for the buck you get from your Tankless Water Heaters.
Customer Ratings: Number ratings grade Tankless Water Heaters objectively.
Customer Reviews: Closely related to ratings, these paragraphs give you first-hand and detailed information from real-world users about their Tankless Water Heaters.
Product Quality: You don’t always get what you pay for with an Tankless Water Heaters, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Tankless Water Heaters is should be an indication of how long it will work out for you.

Romance University always remembers that maintaining Tankless Water Heaters 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 Tankless Water Heaters is irrelevant, incorrect, misleading, or erroneous, then please let us know promptly! We’re here for you all the time. Contact us here. Or You can read more about us to see our vision.

20 Best Tankless Water Heaters of 2023 – Romance University

How Do You Buy The Best Tankless Water Heaters?

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