Best Gas Tankless Water Heater Reviews 2022- [Top 9+Buying Guide]

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Switching from a traditional gas water heater to a tankless gas water heater is the best decision to save lots of money, storage, and time without compromising comfort.

Everyone including me wants the best gas tankless water heater which supplies endless hot water instantly by saving energy cost and storage.

We are feed up with traditional tank gas water heaters because they take time to heat the water, occupied lots of storage, not cut off energy bills at all, isn’t it?

So finally, we have decided to make the list of best gas tankless water heater, which provides endless hot water by saving lots of time, space and cut off your energy bills by 50%.

Our team of experts has tested the units in their houses, labs, etc. To ensure that these are the best units currently available in the market.

We have analyzed the flow rate, temperature, safety, durability comfort, and other modern features as well.

Keep scrolling down to get your list;

GASLAND Outdoors BE158 1.58GPM 6L Gas Water Heater Review
  • Energy-saving.
  • Anti-freezing protection.
  • Built-in shower.
Eccotemp i12-NG Tankless Water Heater Review
Eccotemp i12-NG
  • Built-in exhaust fan.
  • Energy-saving mode.
  • Compact Size.
Rinnai RU160iP
Rinnai RU160iP
  • Endless hot water.
  • 96% Efficiency.
  • Control-R 2.0.

Best Gas Tankless Water Heater

According to our research, the best gas tankless water heater is the one that can supply a sufficient flow rate with the required temperature rise by saving lots of space and energy bills.

Though there are several other features like built-in Wi-Fi, Remote Control, and computerized safety, still these are the additional features that vary from unit to unit.

Our primary needs should be full fill then we can think about additional features. Speaking of the best, we have also covered the best tankless water heaters overall including electrical, check them out too.

Without further wasting time let dive in.

#1 . Rinnai RU160iP Sensei Super High-Efficiency Tankless Water Heater

Rinnai RU160iP Sensei Super High-Efficiency Tankless Water Heater Review


  • Comes with different flow rate (7, 9, and 11 GPM)
  • Available in natural gas and propane
  • Cric logic technology to cutoff energy bills.
  • Easy to operate and install
  • Powerful heat exchanger to supply hot water instantly.
  • 12 years for heat exchanger warranty, 5 years for parts, and 1 year for labor.
  • Wifi ready.
  • South coast air quality management approved (SCAQMA).
  • Energy star approved.

High Flow rate and Efficiency:

Rinnai always comes with some reliable and unique stuff, RU160ip is the most efficient and powerful unite of Rinnai sensei super HE series.

It comes with various flow rates like (7, 9, and 11 GPM), also you have the option to select the propane or natural gas-powered water heater.

Rinnai combines its experience and expertise to make this unite ultra-efficient. They utilize the Cric logic technology to save your fuel cost without compromising comfort.

Cric-logic technology will observe your habits and supply hot water accordingly to save your fuel cost.

The manufacturer claims that this unit will provide endless hot water by saving 10% more energy cost as compared to the other tankless gas water heaters.

Also, this is an energy star-certified unite with 96% efficiency.

Environmental friendly With noiseless operation:

Though this gas tankless water heater, still manufacturer try their best to make this unit more environmentally friendly.

According to the most credible source “South Air Quality Management,†this unit emits a very low amount of NOx and SOx because of its perfect combustion mechanisms.

Wifi-ready with Control 2.0 mobile App:

The control app will allow you to control the whole unit with a mobile or tablet, a perfect app for lazy persons.

Space-saving design with easy installation and operation:

Its space-saving design can be installed anywhere without hiving a plumber.

You can install it by following the manual, also, its operation is very simple just you need to set the temperature rise and flow rate on the digital display.

Durable heat exchanger and parts:

Its both primary and secondary heat exchangers are built from high-grade material so that it can last for years.

Moreover, its other parts like valves, pipers combustion chamber, etc. are also built from ultra-durable material to maintain its efficiency for a long time.

Impressive warranty:

Rinnai not only provides you modern features but also provides you an impressive warranty of 10 years for heat exchangers, 5 years for parts, and 1-year labor for free.


  • Weight: 62 Pounds
  • Dimensions: 18.5 x 11.45 x 31.3 inches
  • Fuel type: Natural gas/Propane
  • Voltage: 120 volts
  • Efficient
  • Durable.
  • Easy to install and operate
  • Endless hot water on demand
  • Available in different variants.
  • Energy-saving technology to cut off the fuel cost.
  • Environmental friendly.
  • Expensive.
  • Heavyweight.

As per our Experiments, this is the best gas tankless water heater currently available in the market because it provides endless hot water with an efficiency of 96% which is amazing.

More it comes with various flowrate (7, 9, and 11 GPM) you can select according to your needs.

Another major benefit of this unite is, it comes with Cric logic technology which senses your habits and supplies hot water accordingly to save your fuel cost.

Get this one and do multitasking, take shower, operate a washing machine, dishwasher, and sink simultaneously, it will never distract your comport.

#2 . Rinnai V94IN Tankless Water Heater



  • Instant endless hot water on demand.
  • Wi-Fi capability.
  • Control-R 2.0 mobile app.
  • Supplies 7.5GPM
  • 82% efficiency.
  • Digital meter to adjust temperature and flow rate.
  • Compact design.
  • Temperature ranges from 98-140f.
  • Temperature locks to prevent any incident.
  • Enhanced scale detection.

Supply 7.5 GPM with 82% efficiency:

V94IN-7.5GPM is ideal for an average household rated with 7.5GPM which is sufficient for 3 showers and one sink. However, you can expect more flow rate in warmer seasons.

Though this is a gas tankless water heater, still its efficiency is amazing you will get 82% efficiency on propane gas.

Forget about nerve-wracking bills it will carefully utilize your fuel without compromising the comfort.

Compact stylish design with a User-friendly interface:

Its compact and stylish design can be blend with your interior decor without utilizing lots of space.

Moreover, its operating system is very simple, you have a digital meter with options to set the temperature flow rate, and other things according to the needs.

Wife ready with Control –R 2.0 Mobile app:

Also, Rinnai develops a Control-R 2.0 mobile app to further facilitate their customers.

Know you can increase flow rate, temperature, timer, schedule, etc from your mobile device.

Simple installation and maintenance:

When it comes to the installation process, the Rinnai manufacturer will provide you a detailed manual to install it easily. Still, if you want some help please contact Rinnai customer care they will help you for sure.

Latest safety features:

Temperature locks and enhances scale detection are a lifesaver for you and your unit.

Temperature lock will lock the temperature at a certain level to keep you safe, however, the enhanced scale detection will save your unit from long-term damage.

Environmentally friendly:

Though this unit works on gas, still it emits a little amount of NOx and SOx, also it complies with the standards of south and air quality management.

Speaking of such, check out the Pros & Cons of tankless models for clarity.

Sufficient warranty:

The manufacturer will provide you 12 years of warranty for heat exchangers, 5 years for parts, and 1year for labor.


  • Weight: 45.6 pounds
  • Dimensions: 14.04 x 9.27 x 26.9 inches
  • Color: white
  • Fuel: propane gas
  • Voltage: 120 volts
  • Durable.
  • Impressive flow rate.
  • Efficient.
  • Compact and stylish design.
  • Easy to install and operate.
  • Environmental friendly
  • Lots of variants according to GPM
  • Low NOx and SOx emissions.
  • Safety features.
  • Required ventilations.
  • Expensive.
  • More unite may be required for a large household with 5+ bedrooms.

V94IN is the best whole house gas tankless water heater powered with propane gas. However, you have the option to select the natural gas unit as well.

The main highlighted features of this unit are its efficiency, durability, flow rate, safety, and warranty.

If you are struggling to find a unit with these qualities this one is built for you.

Moreover, this unit comes with 3 different flow rates (6.5, 7.5, 9.4 GPM’s) which will further provide you options to select the best one for your home.

#3 . GASLAND Outdoors BE158 1.58GPM 6L



  • On-demand instant hot water with a maximum output power of 41000BTU/h
  • 1.58 GPM
  • Adjustable flow rate and temperature.
  • 11.5% Energy saving technology to save lots of propane gas.
  • Noiseless operation.
  • Compact and sleek design.
  • Anti-freezing protection.
  • Built-in shower.
  • Overheating protection.
  • Flame failure protection (ultra-safe).

Ideal for camping and RVs:

BE155 is ideal for a small cabin, RVs, and a single bedroom because it can supply 1.58GPM on demand which is sufficient for a single shower.

Most users purchase this unite for camping because of its lightweight, small size, and simple installations.

Compact and sleek design:

Its compact and sleek design will allow you to carry it anywhere, even you can mount it in a very narrow space.

Built-in shower with instant hot water supply:

It comes with a built-in shower, just you have to install and start enjoying hot water, it doesn’t require preheating just tap on and get instant endless hot water.

Energy-saving technology:

GASLAND manufacturers utilize the 11.5% energy-saving technology to make this unite more efficient.

The propane gas heat exchanger is designed with advanced combustion technology to decrease propane gas combustion and noise. Your one cylinder of propane gas will last for a long time.

Modern safety features:

When it comes to safety, this unite is certified for CSA (safe as per Canadian and US standards).

GASLAND utilizes special safety features like flame failure protection, anti-frizzing protection, and Overheating protection as well.

Water pressure automatically decreases when it crosses the limit of 2.5 to11.5PSI.

The residual water will drain out from the anti-freezing plug to avoid freezing and the flame automatically shuts off when the temperature reaches to undesirable level (167F).


  • Weight: 15.71 Pounds
  • Dimensions: 11.8 x 6.1 x 17.3 inches
  • Color: white
  • Fuel type: propane gas
  • Batteries: 2D batteries
  • Lightweight
  • Budget-friendly.
  • Easy to install and operate
  • Efficient.
  • Compact design
  • Built-in shower.
  • Lots of safety features.
  • low GPM.
  • Parts are less durable.

According to our research, this is ideal for camping, RVs, a cabin, and a single bedroom.

Moreover, you can use this for a large household if you are interested but you need to purchase more units which is not a good decision by the way.

From the price point of view, you will get lots of safety features built-in shower, impressive efficiency, etc. I think this is a complete package for camping you just need to install it and enjoy endless hot water.

#4. Rheem RTGH-95DVLN 9.5 GPM Natural gas tankless water heater Review



  • 9.5 GPM (flow rate)
  • Intelligent electronic system to get 94% efficiency.
  • Intelligent safety features
  • Freezing protection up to -30F
  • Digital meter and a remote to control the whole unite.
  • Self-diagnostic system.
  • Easy to access electrical parts.
  • Overheating wrap to avoid accidents.
  • Recirculation pump kit to supply hot water instantly.
  • Built-in electronic blower which helps to exhaust gases
  • Minimize cold water bursts.
  • Low NOx emissions.

Endless flow rate with 94% efficiency:

This is the perfect package of efficiency, flow rate, and safety for a large household.

This unit will supply 9.5 GPM with an efficiency of 94%, the manufacturer utilizes intelligent electronic controls with a built-in condensation neutralizer to further enhance the efficiency and safety features.

According to our research 9.5GPM is sufficient to operate 3 showers, 1 sink, 1 dishwasher, and a washing machine even in the coldest climate.

However, you will get slightly more GPM in a warmer climate for sure.

Modern safety features:

Rheem RTGH-95DVLN comes with the following brilliant modern safety features.

  • Self-diagnostic system to diagnose automatically to save your plumbing cost.
  • Intelligent freezing protection that can mitigate freezing even at -30 degrees.
  • Overheat film wrap to avoid dangerous temperatures.

Easy to access electrical controls:

It comes with an extremely clean layout you can access each electrical part easily.

Furthermore, you can repair them without the help of a plumber.

water-saving settings:

Rheem has claimed that the water-saving setting will save up to 1100 gallons of water per year by decreasing the flow rate when you don’t need much hot water.

Recirculation pump kit to provide Instant Hot water:

Recirculation pump kits and intelligent electronic controls further increase the efficiency and provide hot water instantly.

Supply hot water even at very high altitudes:

Rheem has claimed that this unite can supply hot water even at 9,840 ft which is amazing you will get hot water even above sea level.

Digital meter to control the whole unite:

A digital meter and remote control to set up the temperature flow rate, etc, according to the requirements.

Durable heat exchangers and parts:

When it comes to durability, Rheem claims that they have tested this unite in different labs to ensure safety and durability; they have utilized the top quality of the material to ensure durability.


  • Weight: 79 pounds
  • Dimensions: 18.5 x 9.75 x 27.5 inches
  • Fuel type: Natural gas
  • Amazing flow rate.
  • 94% efficiency
  • Sufficient temperature rise even in the coldest regions.
  • Easy to install and operate.
  • Tremendous safety features.
  • Freezing protection
  • Durable heat exchanger.
  • A bit expensive.
  • Noisy and heavyweight.

This unite is ideal for large households with 3 bedrooms it can supply a continuous flow of hot water without fluctuating the temperature,

According to our research 3 showers, a sink and a washing machine can be operated at the same time without fluctuating the flow rate and temperature.

Though this unite is a bit expensive, still, it is sufficient for your whole household with modern safety features, a durable heat exchanger, and impressive efficiency.

I think this is the once-in-a-lifetime investment, it will last for 15+ years because they utilize the top-notch material to built this unite, just you have to care about its yearly maintenance that’s all.

#5 . Eccotemp i12-NG



  • Stylish Touch screen digital meter.
  • Sleek and compact design with black gorilla glass.
  • Supplies hot water 0.6GPM (Minimum) to 4.8GPM (Maximum).
  • Gas supplies 25,000 BTU’s (Minimum) to 80,000 BTU’s (Maximum).
  • Electronic ignition system.
  • Energy-saving mode to increase 079 energy factor (79% efficiency).
  • Child lock system for maximum safety.
  • Built-in exhaust fan to protect inner parts.
  • 1/2†NPT water fitting.

Gorilla Glass casing with a beautiful digital meter:

i12-NG is the most stylish gas tankless water heater present in the market because it has a sleek black casing with Gorilla glass features an automatic digital display on the front to adjust the temperature flow rate etc.

Believe me, its front digital display is very beautiful, it will perfectly blend with your decor.

Endless hot water with sufficient temperature rise:

This unit will provide you a minimum of 1.5GPM with a temperature rise of 77F and a maximum 3GPM with a rise of 35-40F

79% Efficiency with energy-saving mode:

you will get an efficiency of 79% which is amazing for the tankless gas water heater.

Moreover, its front digital display has an option for an energy-saving mode that will further save the cost of natural gas by providing hot water on demand. It will sense the usage of users and supply gas accordingly.

Built-in Exhaust fan to remove gases:

i12-NG comes with a built-in exhaust fan that removes the gases rapidly to protect its inner parts.

Modern safety features:

Furthermore, it has a child lock and electronic ignition system which will constantly ensure top-notch safety.


  • Weight: 28.8 pounds
  • Dimensions: 17 x 29 x 11 inches
  • Fuel type: Natural gas
  • Voltage: 120 volts
  • Warranty: 2 years
  • Lightweight.
  • Durable.
  • Led display to control temperature and flow rate.
  • stylish look.
  • Safety features
  • Efficient to save energy bills
  • Low GPM.
  • The installation process is a bit difficult.

Eccotemp i12-NG is ideal for small homes, cabins, saloons, etc. It will supply a sufficient flow rate to use a shower and 2 sinks simultaneously with an impressive temperature rise.

Though you can expect more flow rate in warmer seasons this is the claimed one.

Its digital display and overall design are very beautiful, it can blend with the interior perfectly.

You don’t need to hide it because of its sleek and eye-pleasing look.

Furthermore, it comes with an extra energy-saving option, you just have to turn ON this option and save lots of fuel costs.

#6 . EZ Ultra HE Natural Gas Indoor Tankless hot Water Heater



  • Condensation technology to enhance efficiency.
  • Can be vented horizontally and vertically.
  • Anti backdraft and stell venting pipe included in the box.
  • Automatic operation, just turns on the unit you will get hot water instantly.
  • No, preheat required.
  • Digital touch display for adjustments.
  • Automatic temperature modulation system to stabilize outlet water temperature.
  • Safety flow sensor to stabilize the outlet flow rate.
  • Easy to install and operate.
  • Intelligent electronic system to save fuel efficiently.
  • Automatic adjustment of the gas supply to save your fuel cost.
  • Advanced intelligence (AI) to remember the temperature even after restarting.

Super efficient with sufficient flowrate:

EZ Ultra HE is the latest model powered with propane or natural gas, you have options to select one of them, however, it can supply 3.4GPM with impressive efficiency.

EZ utilizes the Powerfull condensation technology to further improve its efficiency.

The latest condensation technology will utilize the heat of exhaust gases to further reduce the cost of fuel.

No preheating requirements:

EZ makes a passage to utilize hot gases to preheat the water. Now you don’t need to wait for long to preheat water, it will provide you instant endless hot water.

Stable flow rate and temperature:

EZ utilizes fully automatic temperature modulation and flow sensors to stabilize the outlet water temperature and flow rate.

This unite is perfect for those who don’t want to distribute their comfort zone.

Intelligent electronic system to ignite automatically:

A reliable and extremely intelligent electronic control system is installed to ignite unit automatically to further reduce the cost of the fuel.

If the water supply will interpret the gas valve will automatically turn off.

Compact, lightweight, and easy to vent:

EZ utilizes their expertise to make this unite more compact and easy to vent.

This unit can be installed anywhere with an adequate amount of ventilation. You can make horizontal, vertical, or diagonal ventilation for this unite, just you have to keep the length of PVC pipe below 30ft.

Simple operation and installation:

When it comes to operation and installations, this unit comes with a digital display to adjust temperature and flow rate, etc.

Also, its installation process is very simple just you need to follow the manual that’s all.

Clear all durability tests:

EZ tested this unite in USA laboratory, homes, etc to check out the reliability and durability of this unite and surprisingly this unit passes each test even in the coldest regions.


  • Weight: 31 pounds
  • Dimensions:27 x 14.4 x 6.5 inches.
  • Fuel type: natural gas/propane
  • Lightweight.
  • Budget-friendly
  • Efficient.
  • Durable.
  • No preheating is required.
  • Fully automatic
  • Easy to operate and install.
  • Can be vented vertically or horizontally
  • Stylish design can be blend anywhere.
  • low flow rate(GPM).

well according to our research this is the best option for lazy persons because this unite is fully automatic from flow rate to temperature.

Even you don’t need to set up flowrate and temperature after restarting, if you are lazy enough this is for you.

According to our observations, this unit is sufficient for 2 bedrooms, you can operate two showers simultaneously without fluctuating the flow rate and temperature.

If you want to use a washing machine dishwasher, etc. you have to turn off showers and you are good to go.

#7 . Rinnai RU199iP RRU199iP Tankless Water Heater



  • Wifi ready system
  • Concentric and PVC ventilation out of the box
  • Digital display to adjust the temperature and Flow rate.
  • The efficiency of 96%.
  • Space-saving design to save storage.
  • Low NOx emission Technology.

High Flow rate with impressive efficiency:

RuC98iP is the latest propane-powered tankless water heater by Rinnai.  They have claimed that this unit will supply 8GPM with an efficiency of 96% which is amazing.

I think this will surely cut off your energy bills by 40%.

Wi-Fi Ready With Control-R 2.0 App:

This unit comes with built-in wifi to adjust the flow rate and temperature rise on a tablet or cell phone through the control-R 2.0 app.

You don’t need to locate the water heater and start adjusting the temperature and flow rate from its digital display.

Compact and Stylish:

Its space-saving design will save lots of space and can be blend with your interior décor perfectly.

Rinnai utilizes its expertise to make this unit eligible for both concentrate and PVC venting. You should check about venting a tankless water heater too. We have written an extensive guide on that.

Low Emissions of NOx and SOx:

Though this unit is powered with propane gas, still its NOx emission is very low.

Rinnia designed a mechanism to combust fuel properly to reduce the carbon footprint and provide impressive efficiency and save lots of gas.


When it comes to durability, the Rinnai manufacturer claims that they have utilized the top quality material to built its heat exchangers, parts, and body.

That’s why they will provide us 12 years of warranty for heat exchangers,  5 years for parts, and 1 year for labor.


  • Weight: 61.7 Pounds
  • Dimensions: 10 x 18.5 x 26 inches
  • Fuel type: propane gas
  • Voltage: 120 volts
  • Durable.
  • Efficient.
  • Supply endless hot water.
  • Easy venting options.
  • Environmental friendly.
  • Can be operated from a tablet or cell phone.
  • Indoor installation only.

This unit is ideal for an average home with 3 bedrooms, it has the capacity to handle 3 showers and a washing machine at a time without fluctuating the flow rate and temperature.

Though this unit has few reviews, still this is the latest model let people aware of its amazing features.  Hopefully, it will be famous for sure because of its features, efficiency, durability, And easy operations.

#8 . Takagi T-H3-DV-N High-Efficiency Indoor Water Heater



  • Digital display to adjust the temperature, flow rate, etc.
  • Energy conservation system to save gas costs.
  • Computerized safety features to protect the surge tank, overheating, and freezing.
  • Option to troubleshoot the diagnostic codes
  • Extreme low NOx emissions.
  • Primary and secondary heat exchanger to supply endless hot water.
  • Certified up to 10100ft altitude.
  • Provide 10 GPM with the temperature rise of 100 to 185F

Combination of high flow rate and efficiency:

Takagi T-H3-DV-N is the perfect combination of high efficiency and impressive flow rate.

Takagi utilizes their expertise to make this unit more reliable in terms of energy conservation and flow rate.

This unit will provide you endless hot water by cutting off your energy cost.

It can supply 10GPM with a temperature rise of 100 to 185F which is sufficient for 4 bedrooms in warmer seasons or 3 bedrooms in cold seasons.

Digital display:

Also, It comes with a digital display to adjust the temperature, flow rate, and some other features.

Modern safety features:

Takagi utilizes the computerized safety system to protect this unite from freezing, overheating, surge protection, and troubleshooting options to diagnostic the codes

Prove to be an environmentally friendly unit:

Though this is a natural gas unit, still it satisfies the 2012 SCAQMD rule 1146.2 for ultra-low NOx emissions, so if you are an environmental lover this is for you.

Durable parts and heat exchangers:

When it comes to durability, Takagi utilizes the commercial-grade copper alloy which is 25 times stronger than stainless steel.

Also, its secondary heat exchanger is built for 316L steel to get better protection from rusting.


  • Weight: 59 pounds
  • Dimensions: 10.75 x 17.75 x 22.5 inches
  • Fuel type: Natural gas
  • Energy-star certified: yes
  • Voltage: 120 volts
  • Sound level: 55dB
  • Efficient and powerful with energy star certification.
  • Work efficiently even at high altitudes.
  • Computerized safety features.
  • Durable heat exchangers.
  • 15 years of heat exchange warranty and 5 years for parts.
  • Low NOx emissions.
  • Easy to mount anywhere with simple installation.
  • A bit expensive.
  • A little bit noisy.

This unit is ideal for large homes with 3 bedrooms, its amazing flow rate will never disturb your comport, just you need to turn ON, and enjoy the endless hot water instantly.

This is a perfect unit for those who want to use multiple appliances like showers, washing machines, dishwashers, etc. spontaneously even in the coldest regions.

Furthermore, it can work even at a high altitude of 10100ft which is amazing.

Also, it comes with various safety features like freezing and heating protection, surge tank protection, even they have installed a system to troubleshoot the diagnostic codes.

though this unit is not compact and stylish, still, it can be mount anywhere with adequate ventilation.

#9 . Noritz NRC66DVNG Indoor Tankless Hot Water Heater



  • Installation and operation are very simple.
  • Different ventilation options.
  • Remote control and a digital display to control the whole unite.
  • Energy-star certified with 89 to 90% efficiency.
  • Advanced heat exchanger design to supply 0.6 to 6.5GPM.
  • Modern, compact design.
  • High-temperature rise rages from 80-140F
  • 6 power cords are included in the box.

Most powerful unit with an amazing flow rate and efficiency:

Noritz NRC66DVNG is the most powerful and efficient unit of Noritz that comes with direct condensation technology to provide endless hot water with 89%-90% efficiency.

It will supply 0.6GPM (minimum) to 6.5GPM (maximum) with an input of 120,000BTU’s (minimum)  to 174,000BTU’s (maximum).

Most reliable venting system:

Noritz utilized the advanced heat exchanger design to make this unit more reliable in terms of ventilation. Energy conservations, flow rate, and installation.

This unit can be vented using 3″ Schedule 40/80 PVC, PP, or CPVC.

Compact design with easy operation:

Its sleek and space-saving design can be adjusted anywhere without disturbing the look of your interior.

Also, its operation is very simple either you can control the whole unit from its digital display or you can use remote control.

Durable leakage proof heat exchanger:

Moreover, its leak-proof heat exchanger and parts can be last for years; don’t worry about the durability.

The manufacturer is dam sure about the durability that’s why they provide 12 years of warranty for heat exchanger, 5 years for parts, and 1 year for labor.


  • Weight: 39 Pounds
  • Dimensions: 6.7 x 13.8 x 23.6 inches
  • Fuel type: Natural gas/LP
  • Lightweight.
  • Space-saving stylish design
  • Efficient
  • Leakproof durable mechanism.
  • Noiseless operation.
  • Easy to install and operate.
  • Versatile venting options.
  • Environmental friendly.
  • Can’t install outdoor.
  • More units may be required for a large household.

This unite is ideal for a small household with 2 bedrooms, it can supply endless hot water to 2 showers and a sink at a time without fluctuating the temperature and flow rate.

Extreme compact and stylish design can save lots of space and can be installed easily without hiring a plumber.

Also, its operation and maintenance are very simple.

Low NOx emission technology is a real environmental saver, it will sufficiently decrease the carbon footprint by reducing combustion gases.

According to our research, this is the best indoor gas tankless water heater currently available in the market.

Ultimate Buyer’s Guide To Select The Top-Rated Gas Tankless Water Heater

Before purchasing a gas tankless water heater everyone will do some research and calculations to get a feasible one.

Our team of experts prepares an ultimate buying guide for you so that you don’t have to do research to get the best unit.

We have included all parameters to be taken into account before buying the best gas tankless water heater.

Best gas tankless water heater

Flow Rate:

Flow rate is known as GPM (gallon per minute), the flow rate is the amount of hot water supplied by a tankless water heater in a minute.

The different tankless water heater comes with different flow rates ranges from 3 to 11GPM.

Flow rate should be observed according to the usage of water appliances. If you want to operate 3 showers, a sink, a dishwasher, and a washing machine simultaneously you need a high flow rate tankless water heater.

However, if you need a tankless water heater for a small home with a shower, sink, and washing machine, you can do your work with a 4 GPM unit or even less if you don’t want to operate them simultaneously.

Right Temperature Rise:

This is the most important factor, please don’t neglect it, the right temperature rising capacity is very important if you want to maintain your comfort zone.

Groundwater temperature varies from zone to zone, we have observed that the groundwater temperature of the warmer zone of the united states is about 75 to 80F.

However, if we move to the north of the US we may observe a significant decrease in groundwater temperature.

So how we can select the best unit according to our zone, it’s simple you have to check out the groundwater temperature of your zone with the help of a map or you can do manual calculations.

NOTE: Click here to get the whole process to calculated ground temperature and flow rate manually.

The different gas tankless water heater comes with a different temperature rising capacity so you have to select the one which will be perfect for your region.

Let’s suppose your region has a groundwater temperature of 60F, so you have to find a unit that has the capacity to increase at least 80F. Now the sum will be 140F which is I think the perfect temperature to maintain comfort.


Again price tag will vary from unit to unit, company to company if you are interested to purchase a unit with a high flow rate, modern features, sleek design, and full automation. You have to spend more bucks, on the other hand, if you want a normal unit for the average household you need to spend a little less.

We have listed the most affordable unit for you as well you can select one of them, our team tries their best to provide you the best value for money.


Why we are switching from a tank water heater to a gas tankless water heater?

To save our energy cost, isn’t it? I know there are various other benefits but our main goal is to cut off our energy bills.

I suggest you go for a gas tankless water that has at least a 0.80 energy factor.

Though this will be somehow expensive but trust me it will be your one-time investment you will earn that money by saving your energy bills.

Size, Weight, and Design Of The Unit:

A compact and stylish gas tankless water heater will save lots of storage and can be blend with your interior decor perfectly.

Moreover, a lightweight gas tankless water heater will allow you to shift it anywhere, even you can mount it in your RVs as well.

I suggest you go for a compact and lightweight unit if you want to utilize it for both camping and household

But wait;

you have to compromise GPM because more compact and lightweight units mostly come with average GPM ranges from 4-6GPM.

Still, they are sufficient for a small household, cabin, and RVs.

If you want a high GPM unit you may not get a compact unit as you want but there are several brands like Rinnai, Rheem, and Noritz that try their best to transform their large GPM unit into a stylish and compact design.

Automation (optional):

This option is only for lazy persons who want to operate their tankless gas water heater from a tablet, mobile, or remote control.

We have reviewed some units like EZ Ultra HE Natural Gas Indoor Tankless Water Heater and Rinnai R160iP and V94IN Tankless Water Heater which are fully automatic

Even you don’t have to see your gas tankless water heater, you can turn ON and OFF the unit with a mobile app, but keep in mind you have to take care of yearly maintenance.

User-Friendly Operation, Easy To Install and Maintain:

Your selected unit must be user-friendly like it should be ignited automatically, it should have a digital display or mobile app to operate, its maintenance and installation process should be easy as well.

You have to operate your unite regularly, if your unite is very difficult to operate you may get frustrated after a certain time frame.

Moreover, if the installation and maintenance of your tankless water heater are simple you will save the cost of a plumber.

Don’t worry our each reviewed product will be easy to operate, install, and maintain, we have personally tested these unite in our own homes to clarify their reliability.


Everybody wants a gas tankless water heater that can last for years including me.

Why not it is our right to do research and get a durable one so that we don’t want to replace it at least for 5 years.

Let me clarify your thought that know day’s manufacturers try to make ultra-durable tankless water heaters.

They utilize high-grade copper for the heat exchangers to make it more stronger and efficient.

According to our research, a water heater from a reputed brand can last for 10 to 20 years and its parts will also be available in the market.

Don’t get confused we have tested each unit on our list, believe me, all units are perfect in terms of durability.

Environmental Friendly:

Every human being should use an eco-friendly gas tankless water heater to reduce global warming and other environmental impacts, isn’t it?

Though our reviewed units are powered with gas, still they have very little emission of NOx even some of them are certified from South coast air quality management approved (SCAQMA).


After intense research, we have made the list of top-rated gas water heaters present in the market. Believe me, we have tested each unit in the labs and our household just picks one of them and forgets about the discomfort.

I know you have gone through multiple gas tankless water heater reviews, still before purchasing a unit please calculate your requirements, like required GPM, Temperature rise, etc.

I personally prefer the following units.

I am very impressed with the efficiency built quality and modern features of these units you can select one of them blindly.

Thanks for reading out our article Keep share with your beloved ones

Frequently Asked Questions – (FAQs)

Q: What is the best gas tankless water heater on the market?

It depends, whether you are hunting for the best tankless gas water heater for small-medium or large households let me give you the list of my favorite tankless gas water heaters.

Q: Are gas tankless water heaters worth it?

Yes, of course, there are lots of gas tankless water heaters available in the market with high GPM, impressive Efficiency, compact design, and extreme durability.

In fact, you can select one from our reviewed list because we have tested each unite, don’t worry about quality.

A gas tankless water heater is a one-time investment you will save lots of bucks in the future.

Q: Do tankless water heaters use less gas?

Yes, as we have mentioned lots of efficient units including the Rinnai sensei gas water heater which provides 96% efficiency on gas.

Q: Which tankless water heater is better gas or electric?

Again it depends, if you want a water heater for a long time gas water heater is the best option because this is a single-time investment later you can recover your bucks from energy bills.

As the matter of fact, electricity is more costly as compared to gas, however, some people still prefer electrical units.

Q: Is it normal to smell gas from a tankless water heater?

No, it is not normal checkout the gas pipe there may be leakage. If you cant identify please hire a plumber, don’t leave it until you will recover the fault, believe me, it is very dangerous.

Q: Can you sleep in a room with a gas tankless water heater?

Lots of manufacturers claim that they have built their unite safer, still, this is a machine it can be failed any time without telling you.

You have to install a gas unit in a storeroom or other confide space don’t install it directly in your room.

Q: Will a gas tankless water heater work without electricity?

No, a gas tankless water heater still needs electricity to operate a PC board, auto ignition, and other electronic sensors, without having an electric connection several functions like remote control, wifi, etc will not work.

Q: Does a gas tankless water heater need a dedicated circuit?

According to our research, the gas tankless water heater required a tiny amount of electricity to operate sensors PC boards, etc, this will not need a dedicated circuit at all.

Q: How long do gas water heaters last?

Lots of manufacturer claims that their gas unite can be last for 10 to 15 years, now you can observe the durability of these gas units.


About Sami

Sami is also an Energy and Environmental Engineering graduate who has been working as a safety officer in a leading Fertilizer company for 18 months. He is also a graphic designer and marketing manager.

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