5 Best Tankless Gas Water Heater Reviews : Best Reviews & Comparison Chart

The Tankless Gas Water Heater, as the name suggests, is powered mainly by gas and is the most frequently utilized water heater system. The using costs of these tankless water heaters are also relatively low. There are a lot of different types of tankless gas water heaters such as outdoor type, indoor type, portable, and also the whole house type available in the market. When selecting a tankless gas water heater, you should always take your every day hot water requirements into account to get the most suitable one.

In this post, we will provide you a list of different best Tankless gas water heaters and also a few of the best suggestions on selecting the most suitable one for you.

The 4 Best Tankless Gas Water Heaters 2019:

IMAGEPRODUCTDimensionsWeight
Tankless Gas Water Heater
Best Rinnai RUC98iN Natural Gas Ultra Tankless Water Heater Reviews 2019
Rinnai RUC98iN Ultra Series12.5 x 10 x 26 inches81.6 poundsCHECK ON AMAZON
Tankless Gas Water Heater
Best Rheem RTG-95XLN Outdoor Low NOx Natural Tankless gas water heater Reviews 2019
Rheem RTG-95XLN Outdoor Low NOx 14 x 10 x 26 inches54 poundsCHECK ON AMAZON
Tankless Gas Water Heater
Best Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater Reviews 2019
Takagi T-KJr2-OS-NG 6.7 x 13.8 x 20.5 inches38 poundsCHECK ON AMAZON
Tankless Gas Water Heater
Noritz NRC661-DV-NG Tankless gas water heater reviews 2019
Noritz NRC661-DV-NG 6.7 x 13.8 x 23.6 inches39 poundsCHECK ON AMAZON

The Best Tankless Gas Water Heaters Available In The Market:

There are a lot of different Tankless gas water heaters from various brands available in the market, which definitely makes it hard to choose the one that is right for you. To make it all easy for you, we have mentioned a few good options that are available in the market down here:

1. Rinnai RUC98iN Natural Gas Ultra Tankless Water Heater:

This tankless natural gas water heating system was the top-selling product in 2018. It has to be fitted indoors. The twin-pipe installation provides you choice and extra options.

Best Rinnai RUC98iN Natural Gas Ultra Tankless Water Heater Reviews 2019

Features:

  • High-Temp Range:

The temp range of this tankless water heater is between ninety-eight degrees Fahrenheit to one hundred and forty degrees Fahrenheit. It is enough for fulfilling all your house hot water needs every day. For commercial usage, you can easily raise the temp to 1855 degrees Fahrenheit. It can be done using a remote, but you will have to purchase it separately.

  • 8 Gallons Per Minute Water Flow Rate:

The water flow rate of this tankless water heating device is 9.8 GPM. This unit can easily support 3-4 bathrooms and several kitchen faucets simultaneously. You can also use this tankless unit for commercial usage when you cascade numerous of them together.

  • Highly Energy Efficient:

The power need of this tankless device can range from 15200-199000 BTU (British Thermal Units) per hour. The efficiency rating can reach up to 0.95, which means that seldom energy will be wasted during the heating process. The high energy efficient water heating device is capable of saving a big number of heating costs for each month.

Pros:

  • Requires only two watts for keeping the device up and running
  • Two venting options provided (twin pipe and concentric PVC)
  • Five-year warranty for the part
  • Takes up twenty secs for hot water flowing
  • The constant supply of hot water
  • Super quiet functioning condition
  • Commercial use accessible

Cons:

  • Hard to fit, you have to hire a professional for the job
  • _
  • _
  • _
  • _
  • _
  • _

2. Rheem RTG-95XLN Outdoor Low NOx Natural Tankless gas water heater: 

This model is designed as an outdoor system which means you will not need any venting kits to install. This model is available in both propane and natural gas as the main power source.

Best Rheem RTG-95XLN Outdoor Low NOx Natural Tankless gas water heater Reviews 2019

Features:

  • High Energy Rating:

The energy rating of this model can reach up to ninety-four percent, which makes it a very high energy-efficient tankless water heating system. During the entire water heating process, less CO2 is released in the air, which makes it an eco-friendly device.

  • 5 Water Flow Rate:

The same as the Rinnai tankless heater we mentioned earlier, the water flow rate of this device is 9.5 GPM, which denotes it can be used as the whole house water heating device for a large household and for the commercial quickly. Several faucets and bathrooms can also be utilized simultaneously.

  • Remote Control:

The EcoNet smart home technology of this device allows you to control the unit remotely using an application, as the outdoor machine, you can easily adjust your water temp and gas power at home using the phone.

Pros:

  • Both natural gas and propane accessible
  • Stainless steel heating exchanger provides the option for connecting both vents as the water demand goes high
  • No ventilation needs for the outdoor fitting
  • Standard ten-year warranty on the heating parts
  • Supports several faucets and bathrooms at the same time
  • Remote control accessible
  • Endless supply of hot water

Cons:

  • Has to be set up by a professional
  • _
  • _
  • _
  • _
  • _
  • _
  • _

3. Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater:

This tankless water heating unit has a low flow rate than the other tankless water heaters. This model would be the best option for small or middle-sized houses.

Best Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater Reviews 2019

Features:

  • Compact & Stylish Shape:

T-KJ2 series is established to be the smallest and lightest in the entire Takagi tankless water heating devices lines. This model is also capable of saving large space for you no matter for indoor or for outdoor installation.

  • 6 GPM Of Flow Rate:

The tankless water heating machines that we have mentioned earlier are the ones that have a higher water flow rate which can reach up to 9.8 GPM, while this tankless units’ water flow rate is just 6.6 GPM. Even with this water flow rate, this model can still manage to support one bathroom and one kitchen sink simultaneously.

  • 150 Degrees Fahrenheit Temp:

This tankless water heating machine offers hot water with a temp above 150 one hundred and fifty degrees Fahrenheit; the demanded input of power is 140000 BTU (British Thermal Units) per hour, 0.83 energy efficient is also helpful in saving much cash for the water heating costs.

Pros:

  • Natural gas and propane accessible both
  • Compact shape
  • Simple to be set up
  • The constant supply of hot water
  • Demand minimal maintenance
  • Capable of supporting two bathrooms at the same time

Cons:

  • The working sound is a little loud
  • _
  • _
  • _
  • _
  • _

4. Noritz NRC661-DV-NG Tankless Water Heater:

This tankless water heater also provides a relatively small water flow rate which can reach up to only 6.5 GPM. Now let’s find out a little more about this model!

Noritz NRC661-DV-NG Tankless gas water heater reviews 2019

Features:

  • Two Heating Exchangers:

There’re two heating exchangers created using diverse materials that can be selected, one is copper, while the other one is stainless, both of them can last longer and are also corrosion resistance. There’re also freeze protection devices fitted inside the model.

  • 635 GPM Flow Rate:

Compared with the other suggested tankless gas water heating machines, this water flow rate is a little low, but it is still capable of fulfilling the demand of 2 bathrooms uses at the same time. If you live in a colder region, then you can only be able to use one bathroom and faucet simultaneously.

  • High Energy-Efficient:

The gas consumption of this tankless heater can run between 15000 and 120000 BTU (British Thermal Units) per hour, and the thermal efficiency rating of this tankless gas water heating unit can reach as high as ninety-three percent, which can assist in saving a big amount of cash for you.

Pros:

  • Quiet functioning condition
  • Compact design shape
  • Low NOx design
  • Can be vented using the schedule fitting and 40 PVC Pipe
  • Freeze protection
  • Can also be controlled remotely

Cons:

  • Coldwater sandwich
  • _
  • _
  • _
  • _
  • _

5. Naiven NPE-240-A Tankless gas water heater:

The Naiven NPE-A series is outstanding in its patented high technology inserted; it can also represent the tankless water heating device of the future.

Best Noritz NRC661-DV-NG Tankless Water Heater Reviews 2019

Features:

  • External Interface Installed:

For showing the error codes and water temp, n external interface is installed. For quickly adjusting the temp, you can use a button that is available on that interface.

  • Recirculation Pump And Buffer Tank Included:

This tankless water heating model is designed with ComfortFlow technology. A circulation pump and buffer tank is also included in the machine for reducing the cold water sandwich and saving on water bills by simple decreasing the time for getting the hot water you require. This model boasts that you will only need a second for heating the water.

  • Condensing Stainless Steel Heating Exchanger:

This tankless water heating machine is designed using the patented condensing technology; double stainless steel heating exchangers can recover the additional heat for cutting the CO2 emissions and energy consumption. It can also keep the exhausted temp low.

Pros:

  • Less waiting time for your hot water
  • Clear fitting and utilizing instructions
  • Intelligent preheating technology can make life easier
  • Quite powerful
  • Rapidly correct water temp if it draws stops all of a sudden
  • Good at keeping the temp constant

Cons:

  • You have to purchase extra remote for controlling it remotely
  • Slight functioning noise
  • _
  • _
  • _
  • _

The Best Condensing Natural Tankless gas water heaters:

Because of the individual functioning principle of the tankless natural gas hot water heating unit, a lot of the leading manufacturers make their hot water heating devices into the condensing types, for cutting the greenhouse gas and energy consumption down. There are a few top condensing natural gas tankless hot water heating machines we’d want to recommend to you:

  1. Naiven NPE-240-A Tankless gas water heater:

All of the tankless hot water heating devices by Navien come with the condensing technology. This technology really helps in cutting down the CO2 emissions and energy consumption by simply recovering the additional heat that would be lost in the non-condensing models. There also a lot of other Navien condensing natural gas hot water tankless water heating devices you can really go for. All of them are technically designed to fulfill all your hot water requirements every day.

Best Naiven NPE-240-A Tankless gas water heater reviews 2019

2. Noritz NRC661-DV-NG Tankless Water Heater:

This Navien model is also a gas condensing tankless water heating unit worth mentioning. And it comes with two heat exchangers; one is made of copper while the other one is made by stainless steel. Together with its low NOx sleek design, this device is able to save heating costs and much energy for you. To know more about the products, you can feel free to visit Amazon.

Noritz NRC661-DV-NG Tankless gas water heater reviews 2019

What Are The Tankless Gas Water Heaters?

As the name suggests, it is a water heating device that makes use of natural gas as the main power source. These devices can heat your water in just a few minutes or even in a few secs. They can also supply hot water consistently without the worry of running out of water. Unlike the tank water heating models, these devices can also help you save a lot of space in your house.

What Are The Tankless Gas Water Heaters

While taking a shower, you will not have to worry about running out of hot water anymore when you have a gas tankless water heater installed in your house. However, you will need to install a venting system so that the carbon dioxide can be emitted in using, especially when you have installed your water heating system indoor.

Why Should You Go For The Tankless Gas Water Heater?

There are different types of tankless water heaters available in the market, such as electric, gas, or propane tankless water heater. But a lot of people recommend using gas tankless water heaters. Why? Well, the following are a few of the reasons why you should always go for the gas tankless water heating unit:

  1. They Are Efficient:

The tankless gas water heating units are three times more efficient than the other non-gas tankless heaters such as the electric tankless water heaters. And there are nearly up to ninety percent usable energy in usage. The usable energy of the other types can reach around eighty percent or even less than that.

  1. They Are More Eco-Friendly:

The gas tankless water heating devices area much cleaner than the other petroleum-based fuel types. These gas tankless heaters release forty-five percent less CO2 in the air than the other tankless non-gas water heating machines.

  1. They Are More Dependable:

For the tankless gas instant water heating devices, the natural gas is transmitted and utilized through the underground pipelines; you can make use of it in several applications simultaneously. Thus it’s more safe and reliable.

  1. They Are More Economical:

The using costs of the gas tankless water heating machines are relatively lower but are more powerful. And according to the professional tests, a tankless water heater that is being powered by natural gas is capable of saving thirty percent less cash for you on the heating bills every month.

Different Types Of Gas Tankless Water Heaters:

With diverse installation applications and spots, the gas tankless water heating machines are various. You can divide them into outdoor type, indoor type, portable type, and the whole house type.

Different Types Of Gas Tankless Water Heaters 2019

Below here we will discuss a few fundamental features and differences of all of them. And for each device, we have provided reviews in detail. You can select the one that really can fulfill your every day hot water heater requirements.

The Installation Spots:

  1. Outdoor Tankless Gas Water Heater:

Ass eth name suggests the outdoor gas-powered tankless water heating systems are installed outdoors. But for cutting down the waiting time these devices are frequently installed outside your bathroom or kitchen wall. In this case, you will not have to worry about ventilation. But you still have to make sure that the device is well protected from the severe weather conditions all the time and make sure to not to put anything on this machine that is flammable.

There are still a lot of other stuff that you have to contemplate about the gas outdoor tankless water heater devices. We have provided different reviews about these types of devices, so make sure to check out these reviews and finally get the one that suits your every day hot water needs.

  1. Indoor Tankless Gas Water Heater:

The gas indoor tankless water heating units refer to the heating devices that are installed inside of the house whether in under your kitchen sink or in your bathroom. The key to these types of water heaters is the venting. You must install the ventilation system whenever you install a tankless gas hot water heating device indoor. It will help in emitting the gas out.

If you installed your indoor heater as a point of use, then it will take just a few secs for the flow of your water, primarily cutting down the waiting time and saving much cash for you. If you are really thinking about getting these types of gas tankless water heater for your house, then make sure to check out the reviews we have mentioned to know more about these devices.

The Size:

  1. Portable Gas Tankless Water Heater:

These types of gas tankless water heaters or the small gas tankless water heaters refer to the machine that is lightweight and small. You can take these dives anywhere you want and are really helpful if you like camping. And certainly, the cost of the gas tankless water heating devices is also very low. If you are interested in purchasing the one for you too then be sure to check out the detailed Amazon reviews.

  1. Whole House Gas Tankless Water Heater:

Hot water is required all the time whether you are doing laundry, taking a shower, or washing your dishes and hands. Thus you will have to buy a whole house gas tankless water heater for your house to supply hot water to both your faucets and shower at the same time. These types of tankless heater also come with a large water flow rate and are much more powerful. We have also give details about the whole house gas tankless water heaters so make sure to check them out and then choose the most suitable one for you.

Electric Vs. Gas Powered Tankless Water Heaters:

Gas and electric are the two key power sources of the tankless water heating devices. A lot of people get so confused between both and can’t decide which one to get. But don’t worry! We have made a little comparison chart between both the electric and gas-powered tankless water heaters to clear everything a little bit for you:

Tankless Gas Water Heaters:

Pros:

  • Lower price than the electricity one
  • More powerful, capable of supporting multiple bathrooms and faucets simultaneously
  • More safer while utilizing
  • Capable of heating the water in the colder climates

Cons:

  • Release CO2 directly from the venting
  • More costly in price than the electric type
  • Requires ventilation system
  • _
  • _

Pros:

  • More reasonably priced
  • Don’t directly release carbon dioxide in the air
  • Don’t affect by the high altitude
  • Don’t require a ventilation system

Cons:

  • Need more maintenance while utilizing
  • Less powerful needs multiple units for supporting equal power as the gas ones do
  • More pricey on heating bills and using costs.

How Can You Select The Best Gas Tankless Water Heater?

There are a lot of different manufacturers and types of tankless water heaters available in the market. And choosing the best one out of so many options available is a big task and can give trouble to anybody who is willing to get the one.

But don’t worry! There are a few factors that you should consider when purchasing a gas tankless water heater. Let’s check out all these factors so that you can get the most suitable tankless heater for you!

  1. Ventilation:

As the natural gas is used as the main power source, the tankless gas water heating device requires ventilation kits for emitting the utilized gas out. These ventilation kits are at times not appropriate for every machine; a few of the water heating machines need special ventilation. And required PVC pipes are also diverse; acquainting clearly about the ventilation technique can assist in saving a big amount of cash for you.

  1. The Water Flow Rate:

The diverse water flow rate identifies diverse user applications. The tankless water heating units that come with a small water flow rate like two to three GPM are normally point of use or portable ones. If you like traveling or camping these ones can really be helpful and are great options to go for. But if you want a tankless water heating device for supplying hot water to your entire house, then the tankless heater with a small water flow rate would not be enough for fulfilling your every day hot water requirements. So before choosing one, you have to make certain to know the exact water flow rate you require.

  1. Energy Efficient:

Also, make sure to get your hand on a tankless water heating machine that is highly energy efficient. That is because such devices can really help you a lot in saving a large amount of cash on using costs and particularly on the heating bills. For the tankless gas water heating device, thermal efficiency is a necessary contemplation for you, a few of which can really reach up to ninety-five percent, which is highly efficient ones, while a few can reach just sixty to seventy percent.

  1. The Size:

The size of your gas tankless water heating device has something to do with the size of the house you want to get it for. If you have a big house and want to make use of it for the entire home, then we’d like to recommend the whole house tankless water heating machines for you. However, if you don’t have much space in your house and simply desire something small for supporting the faucet use only, then you can select the tankless water heating device that can simply be installed under the kitchen or bathroom sink which won’t take much space.

  1. The Waiting Time:

The waiting time of the water heating unit refers to the time for the hot water flowing out of your pipe installed to the destination. If the waiting time is longer, then it is certain that the cold water will be wasted, and thus the water bills will be appended accordingly. Therefore make sure to buy a tankless heater that comes with less waiting time which will ultimately help you save much cash to some extent.

Attention:

  • Don’t put anything on your tankless water heating unit that is inflammable.
  • For the indoor fitting, you have to install the venting kits.
  • Stop utilizing it once something wrong takes place.
  • You should install your water heater at a safer distance from the water or other devices.
  • Always utilize the tankless heater under the instructions needed.
  • Keep in mind to switch off the gas valve each time you stop utilizing the tankless heater.

The Prices Of  The Tankless Gas Water Heater:

One of the main features of the gas tankless water heating devices is the high buying cost of the units, the majority of which are around one thousand dollars, and certainly, there’re also fitting charges as well as the venting charges if set up indoor. But it absolutely worth the cost, for the using costs, can be very low and hardly require maintenance in the later using.

The Prices Of  The Tankless Gas Water Heater

 

It’s established that the gas tankless water heating machine is equal to saving thirty percent cash on water bills and heating bills every month, and the service life of the device can reach as long as twenty years for a few brilliant ones. For the long term of usage, a gas tankless water heating device is basically equal with the tankless electric heater type or even cheaper.

But still, you have to choose sensibly according to the actual requirements and budget; there’re also a lot of other outstanding gas tankless water heaters with comparatively low cost, if you are interested in buying one, then please feel free to check out details on Amazon. You may also find a great discount on products you are interested in purchasing and save a big amount of cash for you.

Frequently Asked Questions Section:

  1. Will The Temperature Of The Water Be Affected By Altitude?

Yes, for the tankless heaters that are powered by gas, the gas can lose efficiency at the rate of four percent per one thousand feet when it is utilized at four thousand feet. But for the tankless electric water heating unit, the water temp can stay stable and isn’t affected by that.

  1. How Long Does It Require For Heating The Cold Water?

The heating time is directly related to the performance of your tankless water heating device; a few tankless water heating units are made for heating the water in a few secs, while the others require one or even two minutes. But it’s also affected very much by the distance between your tankless hot water heating machine and the destination the heated water has to reach at. If you desire a tankless water heating device that comes with an extremely short waiting time, then you should install the machine right near the point of use.

Summary:

The tankless natural gas hot water heating machine is becoming more and more well-liked these days, a lot of leading companies such as Naiven, Noritz, Rheem, and Takagi, etc. are still doing their best for perfecting the performance of the gas tankless hot water heating machines.

You can always get in touch with the manufacturer whenever you have any trouble regarding your tankless device or in venting or selecting the best option. Also, if you desire to get extra information about the cost or other details of the products, you can freely check them out on Amazon; it’ll always fulfill the demand and provide the best service to you.