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20 Best Tankless Gas Water Heaters of 2023 – Romance University

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

2,312 Reviews Scanned

SaleRank No. #1

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

SaleRank No. #2

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. #3

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. #4

FOGATTI Natural Gas Tankless Water Heater, Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series

We recommend that all installations of units must be done by the local building and plumbing codes of the installation location and installation be done by a licensed professional.
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 0.81, the high energy conversion rate can effectively reduce energy loss.
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 installation.

Rank No. #5

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. #6

TCFUNDY 18L Tankless Water Heater Propane Gas, 4.75 GPM On-Demand Instant Hot Water Heater with Digital Display, Touch Screen, Thermostatic & Energy Saving, Overheating Protection, Gold

【18L Tankless Water Heater】TCFUNDY Tankless water heater with compact design saves more space and energy efficient than traditional water heaters. LCE screen with digital temperature display and touch screen control. There are 3 modes you can choose: eco mode, common mode, tub mode.
【On-Demand Instant Water Heater】High efficiency propane gas tankless water heater delivers 4.75 gallons per minute of on-demand endless hot water. No more waiting for long time, instant hot water for families, homes, cabins or apartments.
【Steady Temperature Control】Water heater built-in high-precision thermostat ensures constant temperature and temperature difference control within ±2℃, high-thermal efficiency up to 90%. The self-modulating temperature technology only heat up water while you are using it to save energy.
【Anti-Freeze Protection】TCFUNDY water heater has an anti-freeze heating device. It does not require manual drainage, it will automatically heat up to prevent the water tank from freezing. The power supply must be continuously connected, otherwise the anti-freeze heating device will not work.
【Safety of Use】Premium Oxygen-Free Copper Heat Exchanger to ensure long lifespan, automatic power-off when water is off and over-temperature protection, flame-out protection, air flow pressure switch protection to ensure the safety.

SaleRank No. #7

Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, 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: Up to 11 GPM hot water flow rate for a powerful, constant stream
Instant Heating: Equipped with Circ-Logic - Pair with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation
Guaranteed to Last: 15-, 5-, and 1-year residential for heat exchanger, labor, and parts, respectively. Wifi monitoring.

Rank No. #8

Rinnai V53DeN Tankless Hot Water Heater, 5.3 GPM, Natural Gas, Outdoor Installation

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 5.3 GPM for a powerful, constant stream that serves up to 4 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. #9

Rheem RTG-84XLN-1 Mid-Efficiency 8.4GPM Outdoor Natural Gas Tankless Water Heater, Gray

Exclusive Water Savings technology conserving up to 1, 100 gallons per year
157, 000 BTU (gas consumed per hour)
Exclusive Hot Start Programming minimizes cold water burst by staying in ready-fire state
Recirculation pump ready kit ready
For use outdoors with freeze protection up to -30 degrees

Rank No. #10

Rheem Mid-Efficiency 7.0GPM Indoor Natural Gas Tankless Water Heater

EcoNet is the Brains of Rheem Smart Air and Water Products, using the latest in sensor technology, the EcoNet Smart Monitoring System offers a new level of protection, comfort and energy savings
Flow rate range from 0.26 GPM minimum to 7 GPM maximum flow rate
Temperature varies from 80F minimum to 140F maximum temperature, preset at 120F from the factory
Electronic ignition requires 200 watts, and provides reliable ignition for many years
Constructed from copper and stainless steel for rugged durability

SaleRank No. #11

FOGATTI Natural Gas Tankless Water Heater, Indoor 4.0 GPM, 90,000 BTU Instant Hot Water Heater, InstaGas Classic 90

【Smaller size and better performance】It is only 1/4 the size of a 50 gallon tank water heater, yet it produces approximately 4.0 GPM of hot water through 90,000 BTU for both bathroom and kitchen hot water demand. The highly integrated components also provide greater safety from water pressure surges without the need to install an expansion tank.
【Fast and endless supply of hot water】The heat exchanger quickly heats the water to a maximum of 149℉ in a short time, and the hot water is quickly piped through to the shower and tap. No need to wait for the water temperature to heat up slowly like a tank water heater. After that it continues to operate at approximately 4.0 GPM for 40 minutes, which is enough time to produce almost 160 gallons of hot water.
【Stable and comfortable temperature】Benefiting from the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.
【High compatibility and easy installation】Most tank water heaters have exhaust vent, water and gas pipe that can be universally used in tankless, requiring only a simple re-layout. If installing a tankless water heater in a new house, its compact size makes it easy to install. Of course, we recommend that all installations are carried out in accordance with local building and plumbing codes by licensed professionals.
【Excellent quality and service】CSA certification in the USA and Canada. Superior safety and durability using the world's most advanced technology. FOGATTI provide 5 years warranty on heat exchanger and 2 years warranty on other parts.

Rank No. #12

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. #13

TCFUNDY 1.58 GPM Tankless Water Heater Propane Gas 6L, Instant Hot Water Heater, Portable Digital Display Gas Water Heater, with Shower Head

【6L Tankless Water Heater】TCFUNDY Tankless water heater with compact design saves more space and energy efficient than traditional water heaters. Using at 3.63 - 116 PSI of water pressure, 1.58 gallons of hot water can be output per minute, the maximum temperature raise is 75℃/167℉. Applicable only propane gas (LPG).
【Efficient & Energey Saving】High efficiency propane gas tankless water heater delivers 1.58 GPM of instant hot water, no more waiting for long time. The heater exchanger and main burner adopt mostly advanced energy-saving and combustion technology to decrease gas consumption and burning noise.
【Safety of Use】The hot water heater has overheat protection, dry combustion protection, flame failure protection, low water flow protection, high water pressure protection, Manifold Auto Protection. In order to avoid freezing in cold weather or in case of long time no use, please drainout the remaining water after using.
【Intelligent Control】Equipped with season control center, gas control center, water control center, can adjust different temperature and water quantity. Digital display is easier to check temperature. Automatic electric ignition powered by two size 'D' batteries (not included).
【Lightweight, Compact & Portable Design】Portable water heater compact size and weight 11 lbs, easy setup outside. Size: 11.4" x 4.9" x 14.8". Always check gas leakage before operation.To avoid gas leakage caused by improper sealing of the water heater, DO NOT TWINE TEFLON TAPE between gas regulator and gas inlet pipe.

Rank No. #14

Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 GPM - RTGH-95XLN-2

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 outdoors with freeze protection up to -30 degrees

Rank No. #15

FOGATTI Propane Gas Tankless Water Heater - Outdoor Installation 6.3 GPM, 145,000 BTU White Instant Hot Water Heater, Instagas Classic 145S Series

【Outdoor installation to save space】The product is installed outdoors and does not occupy the living space. The bottom built-in forced DC fan eliminates the influence of external wind. So as to ensure the stability of combustion, achieve safety, energy saving and no pollution. We recommend that all installations are carried out in accordance with local building and plumbing codes by licensed professionals.
【Endless water supply without preheating】The heat exchanger quickly heats the water to a maximum of 140°F, which is ready for use without waiting for hot water. It can run at approximately 6.3 GPM for 40 minutes, enough to produce almost 250 gallons of hot water. Make a multi-point water supply for the whole house to meet your family's water needs.
【Precise temperature control and stable temperature】Equipped with a wire controller cord length of 164ft, allowing you to control the water temperature indoors. The burner can be burnt in sections to meet the water temperature demand in the four seasons. Benefiting from the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.
【Compact design for easy installation】The tankless design is 1/4 the size of a 50 gallon tank water heater, making it easy to install. The highly integrated components also provide greater safety from water pressure surges without the need to install an expansion tank.
【Excellent quality and service】CSA certification in the USA and Canada. Superior safety and durability using the world's most advanced technology. FOGATTI provides 5 years warranty on the heat exchanger and 2 years warranty on other parts.

SaleRank No. #16

Natural Gas Tankless Water Heater, MIZUDO 3.6 GPM, 80,000 BTU Indoor Installation Instant Hot Water Heater

【Instant Hot Water Heater】Tankless water heaters can provide endless hot water on demand for 2- 3 water points.
【Comfortable Bathing Experience】3.6 GPM hot water flow, precise temperature control, no water temperature sandwich.
【Premium design and Durable】Adopt oxygen-free copper water tank, reduce heat loss, high efficiency and durability.
【Compact Design】Save over 50% of available space compared to tank water heater.
【Quality Service】If you encounter product quality problems, you can contact us by phone, email and message, and we will provide service according to the warranty policy.

Rank No. #17

FOGATTI Natural Gas Tankless Water Heater, Indoor 7.5 GPM, 170,000 BTU Black Instant Hot Water Heater, InstaGas Comfort 170 Series

We recommend that all installations of units must be done by the local building and plumbing codes of the installation location and installation be done by a licensed professional.
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 0.81, the high energy conversion rate can effectively reduce energy loss.
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 installation.

Rank No. #18

TC-Home 18L Propane Gas Water Heater Tankless 4.8GPM Instant 36KW LPG Hot Water Heater

Capacity: 18L/min (4.8Gal), SIZE: 13.4"(L) x5"(W) x25.6"(H), 25 degrees warm water producing rate; Cover Material: Cold Rolled Sheet; Gas Type: LPG Liquid Petroleum Gas (PROPANE); Dimension : Picture 2, SIZE: 13.4"(L) x5"(W) x25.6"(H)
Thermal input: 36KW; Working temperature:-8-45℃; Temperature rise: 25℃; Thermal efficiency: ≥80.8%. Torque Range: 3-3.5 N.m
Minimum working water pressure: 0.025MPa; Gas pressure: 2800Pa; Vent Type:4.3" Flue Duct;Gas pipe: G 1/2"; Water Inlet: G1/2''; Water Outlet: G1/2''
Automatic ignition system, Flame failure protection device; Water & gas combination unit ,Fitted with over heating and pressure safeguard; 20 min. off self-timer
Certification: ISO 9001:2000; Net weight: 8.5KG; Mains power not required; Electrical requirement: DC3V, Automatic electric ignition powered by two (2) size 'D' batteries (batteries not included; No electrical hook up; No standing pilot)

Rank No. #19

Rinnai RL75IN Tankless Hot Water Heater, 7.5 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 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 7.5 GPM (5 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. #20

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.

Last update on 2023-07-31 / Affiliate links / Product Titles, Images, Descriptions from Amazon Product Advertising API

How Do You Buy The Best Tankless Gas Water Heaters?

Do you get stressed out thinking about shopping for a great Tankless Gas Water Heaters? Do doubts keep creeping into your mind? We understand, because we’ve already gone through the whole process of researching Tankless Gas Water Heaters, which is why we have assembled a comprehensive list of the greatest Tankless Gas 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 Gas Water Heaters that you consider buying. Your questions might include the following:

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

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

Romance University provides an Tankless Gas 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 Gas 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 Gas 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 Gas 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 Gas Water Heaters.
Customer Ratings: Number ratings grade Tankless Gas 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 Gas Water Heaters.
Product Quality: You don’t always get what you pay for with an Tankless Gas Water Heaters, sometimes less, and sometimes more.
Product Reliability: How sturdy and durable an Tankless Gas Water Heaters is should be an indication of how long it will work out for you.

Romance University always remembers that maintaining Tankless Gas 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 Gas 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.

FAQ:

Q: Why should I buy a tankless water heater?

A: Because they only use energy when hot water is being used, tankless water heaters will likely save you more money over their expected life of 20 years than they will cost you initially. Besides energy efficiency, tankless water heaters take up less space, are easy to maintain, and are more convenient to operate.

Q: Is it worth getting a tankless water heater?

A: There are many benefits to going with a tankless heater. Most units come with a federal tax rebate of $300 and are more efficient than storage tank models — you can shave as much as 20 percent from your water heating bill [source: Energy Star]. Since tankless heaters heat water as it flows, you’ll never run out of hot water.

Q: What is the most reliable tankless water heater?

A: The Best Tankless Water Heaters (Updated 2023) Stiebel Eltron Tempra 36 Plus Electric Tankless Whole House Water Heater. … Rinnai RUC98iN Ultra Series Natural Gas Tankless Water Heater. If your water heater is giving you problems, perhaps it’s time to get a replacement. … Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heater. … Takagi T-KJr2-IN-LP Indoor Tankless Water Heater. … More items…

Q: Should you switch to a tankless water heater?

A: One of the major reasons why people make the switch to a tankless water heater is to cut down on their energy use. For houses that use 40 or less gallons of hot water a day, energy.gov states that a tankless water heater can be 24 – 34% more energy efficient than a conventional storage tank.