If you are constantly worried about hot water supply and insufficient space in your home, you have a faulty water heater. And this is where the concept of the best gas water heaters without a huge tank emerges. If you wonder how tankless water heaters are different, I’ll give you a small clue. These are cost-effective options that fulfill all your hot water demands, having a range of capacities.
You must be thinking about why I took the responsibility to find the best gas tankless water heater for you people. I suffered a lot with this issue unless I started to try every new water heater that hit the market for four to five years. And after all this time trying, I think I can give you advice about which brand makes the best natural gas tankless water heater that covers all your hot water needs.
Before I start jotting down the reviews of the best water heating units without a tank, let me make it clear that all the views shared down below are based upon my and my family’s experience after using these. If you like any other tankless heater that isn’t on the list below, you can opt for that. Now let’s move to the products listed below.
At a Glance:
1. Rinnai RU160iP Gas Tankless Hot Water Heater
- Energy Star Label
- Produces maximum heat limit
- An option between propane and gas
6. Eccotemp i12-NG Tankless Water Heater
- Electric ignition system present
- LED screen with controls
- Stylish black design
7. GASLAND Outdoor Portable Gas Water Heater
- Travel-friendly design
- Equipped with safety features
- Easy assembling process
Best Gas Tankless Water Heater
| Design | Buyer’ Guide | Retailer |
|---|---|---|
Best Pick | Check Price | |
 | Check Price | |
 | Check Price | |
 | Check Price | |
 | Check Price | |
Staff Pick | Check Price | |
Budget Pick | Check Price |
1. Rinnai RU160iP Gas Tankless Hot Water Heater
Best PickHaving cutting-edge specs, Rinnai, a Japanese company, is the best producer of the gas tankless water heater, reaching almost every house. The Rinnai RU160iP has earned the energy star label, providing 10% more efficiency than other tankless heaters available in the market.
With the heating capability of 199,000 BTU, the water flow of this heater ranges from 7 GPM to 11 GPM. This water flow makes it the best natural gas heater for a large family. It is considered the most powerful residential heater that delivers hot water to the maximum limit. It can efficiently work for more than two decades, saving thousands of dollars for the consumers.
The Rinnai RU160iP Gas Tankless Hot Water Heater is the most cost-efficient, safe, and reliable unit that uses natural gas as the power source. Initially, the prices might seem high for a water heater, but it is a life-long investment that you won’t ever regret. Moreover, it has an impressive 10-year warranty.
Pros
- Energy Star Label
- Produces maximum heat limit
- An option between propane and gas
Cons
- A heavy water heater
The Rinnai RU160iP Gas Tankless Hot Water Heater is safe to use for both humans and the environment. It is an energy-efficient unit that can provide maximum heat up to 200,000 BTU. You can also use propane gas instead of natural gas as it gives an option to choose. However, it is a heavier unit weighing almost 62 pounds, making the installation process difficult.
2. Rinnai V65eN Natural Gas Tankless Hot Water Heater
The second on our list is the Rinnai V65eN Natural Gas Tankless Hot Water Heater. After the installation process, this tried and tested HVAC device will never disturb your peace of mind. The heat exchanger can heat the water to 140F with an EF rating of 0.82.
The new condensing technology introduced in 2021 has an improved EF rating and works at an average of 18% energy loss. The V65eN can produce almost 6 gallons of hot water per minute and simultaneously serve up to five different fixtures. This heating unit has the fantastic feature of shutting down when it overheats because of the mineral deposits.
This exemplary model by Rinnai comes with a Control-R 2.0 mobile application so you can schedule your timings for the requirement of hot water. This is a very convenient feature that saves time as you will not have to wait for the water to heat. Furthermore, the Rinnai V65eN can also be put into sleep mode when you are on vacation or done with all the tasks.
Pros
- Water flows at different ranges
- Compatible with smartphones
- Budget-friendly model
Cons
- It cannot be installed indoors
The Rinnai V65eN Natural Gas Tankless Hot Water Heater allows the water to flow at different levels, depending upon your needs. This model can be connected and controlled with the help of a smartphone application. It is one of the most affordable models manufactured by Rinnai, including all the fantastic specifications. One of the drawbacks of this incredible unit is that it can only be installed outdoors.
3. Noritz NRC66DVNG Tankless Hot Water Heater
Noritz is a well-known company famous for manufacturing heating, ventilating, and air-conditioning devices for residential and commercial purposes. The NRC66DVNG Tankless Hot Water Heater by Noritz is next on our list for the best gas tankless water heaters because of their compact size and energy-efficient features.
With natural gas being the only energy source, a condenser can only make this 90% energy-efficient. The installation process with appropriate piping is very much necessary for this unit to function correctly. A valve kit can be purchased for the fitting of the water condensate along with 3” PVC or CPVC pipes.
The NRC66DVNG Tankless Hot Water Heater is suitable for small families as it has a maximum water flow of 6.6 GPM. It is an intelligent investment for the people who need to upgrade from a 40-gallon water heater. This lightweight gas tankless water heater is very economical as compared to electric water heating units.
Pros
- Compact and lightweight
- Energy-efficient up to 91%
- Easy installation process
Cons
- Installed indoors only
The NRC66DVNG Tankless Hot Water Heater by Noritz weighs 39 pounds and has a very compact size. The presence of a water condenser increases the EF rate to 0.91. It has a simple installation process with the help of a valve kit. It can only be installed indoors as it is a condensing unit.
4. Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater
Set aside your worries for hot water as the Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater is here at your service. One of the most cost-saving heaters fulfills your requirements as low as $170 per year. Natural gas, lighter than the air, is the only energy source for this water heating unit.
The addition of a condenser to this incredible unit increases the efficiency to 10%, and due to this, it has earned the Energy Star Label. It reduces the emission of nitrogen which increases the energy in return. This water heater is appropriate for all household tasks and gives above-average hot water.
The Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater has an exceptional warranty which includes ten years of the heat exchanger, one year of labor, and five years of parts. It is a fantastic package that covers everything. This is worth considering if you hunt for the best gas tankless water heater that gives 10 GPM water flow.
Pros
- Economical use
- Safe for the environment
- Incredible warranty package
Cons
- 10 GPM model is available
The Takagi T-H3-DV-N Natural Gas Indoor Tankless Water Heater uses natural gas and is very economical for use in the longer run. Other models providing the 10 GPM water flow are pretty expensive as compared to Takagi T-H3-DV-N. It has earned the Energy Star Label, which makes it safe as it does not emit harmful gases into the environment. A 10 GPM model is only available, which might not be suitable for everybody.
5. Rheem RTGH-95DVLN Tankless Natural Gas Water Heater
The Rheem RTGH-95DVLN Tankless Natural Gas Water Heater is our next choice as we list the best gas tankless water heaters. It is a modern heater powered by natural gas with a built-in condenser. And when we hear the word condenser, we already know that it will have high energy efficiency up to 0.94.
This model has some electronic controls for maintaining the heat output and safety features as it heats very quickly. The installation process can be a little complicated as you have to manage the water drainage system because of the condenser. Furthermore, Rheem offers 12 years of warranty which is even more than the Japanese manufacturers.
The Rheem RTGH-95DVLN is the best tankless water heater for large families. The maximum hot water flow is 9.5 GPM and can run more than one shower simultaneously. It is an HVAC device having unmatched efficiency but has loud irritating sounds. Hence it is a water heater that meets all your requirements.
Pros
- Intelligent electronic controls
- 12-year warranty
- Durable and sturdy
Cons
- Complicated installation process
- Irritating loud noises
The RTGH-95DVLN Tankless Natural Gas Water Heater by Rheem has electronic controls which are better for understanding and user-end management. It also prevents accidents due to the protection protocols. This is a reliable water heating unit that has a 12-year warranty. However, the installation is not easy, and loud sounds are produced when this heater is functioning.
6. Eccotemp i12-NG Tankless Water Heater
Staff PickThe Eccotemp i12-NG Tankless Water Heater is a reliable water heater that gives outstanding performance. It has a stylish design and is one of the most potent natural gas water heating units available in the market. It can fit perfectly anywhere in your house or apartment and blends in with the interior.
The front panel has an LED display which makes setting and controlling easy and efficient. The installation process of this unit is straightforward, while black tempered glass gives it a very sleek look. It is equipped with an electronic ignition system that is safe to use and prevents accidents.
The Eccotemp i12-NG Tankless Water Heater has a 3 GPM water flow. It does not have the pilot requirement and provides an on-demand performance to the users, making it environment-friendly as energy consumption is reduced. Moreover, it has an energy-saving mode and a child-lock, which reduces the risks of haphazardness.
Pros
- Electric ignition system present
- LED screen with controls
- Stylish black design
Cons
- It might get very hot
The Eccotemp i12-NG Tankless Water Heater is a modern water heater with an electrical ignition system which makes it a hassle-free process and saves you from mishaps. The LED screen on the black front has different controls and settings. It makes the operation of this water heater very easy. However, the heater might get very hot if used non-stop.
7. GASLAND Outdoor Portable Gas Water Heater
You will love this masterpiece from GASLAND as it is an extremely lightweight, portable design. It can easily fit into small spaces and is very much suitable for your homes or even offices. Due to its small size, the installation process of the GASLAND Outdoor Portable Gas Water Heater is done in a matter of a few minutes only.
It is equipped with loads of safety features which is an incredible feature to attract most consumers. The GASLAND is the best natural gas tankless water heater as it has a flame failure device and anti-freeze protection, making it functional throughout the year, whether hot or cold. Once the water exceeds 110 psi, the overheating protection is enabled by stopping the heating and preventing you from accidents.
The water flow of the GASLAND portable heater is 1.58 GPM and has a maximum power output of 41,000 BTU per hour. This automatically starts heating the water fast, saving your time and energy. It is also an excellent option for all the campers who do not like to give up on comfort while camping under the sky.
Pros
- Travel-friendly design
- Equipped with safety features
- Easy assembling process
Cons
- It has no warranty
The GASLAND Outdoor Portable Gas Water Heater is a compact water heater and has a travel-friendly design. You can carry this easily without any hassle. This unit is equipped with loads of safety features that protect you and your family. The assembly is quite simple as it is a small water heater with simple functions. However, the manufacturers do not offer any warranty for this product which is a point where the customer might back off.
8. Rinnai RUR98iN Natural Gas Tankless Water Heater
Budget Pick
The last we have on the list is another model manufactured by Rinnai. The Rinnai RUR98iN Natural Gas Tankless Water Heater is considered the best because of its high efficiency, up to 96. When the heater temperature rises to 60 degrees, this can fulfill all the demands for hot water.
It has a super high gallon per minute as powered by natural gas, which is economical. The cold climatic conditions do not hinder the functionality of the Rinnai RUR98iN Natural Gas Tankless Water Heater. Hence it is the best natural gas tankless water heater with solid construction.
This water heating unit has a water flow rate of 9.8 GPM with dual heat exchangers. The condensation is considered an additional energy source that does not affect the flow rate at any cost. With so many incredible features, the price is still very high even if we compare it to the other models by the same manufacturers.
Pros
- Dual heat exchanger for condensing
- The high temperature of 60F
- Excellent efficiency and flow rate
Cons
- Very expensive
The Rinnai RUR98iN Natural Gas Tankless Water Heater does not compromise efficiency as it has dual heat exchangers. Moreover, it is the highest energy-efficient unit among the other models. Despite having so many unique features, the customers hesitate after seeing the price tag of this water heater.
Guide to Buy the Best Gas Tankless Water Heater
Many factors influence the performance and benefits of the gas tankless water heater, which are necessary to consider before you make a decision. They must be a good fit for your home and fulfill all your hot water demands. The following features shall be kept in mind before making a purchase are:
Fuel Type
The gas tankless water heater can be powered by three types of fuel, i.e., natural gas, propane, or electricity. Different tankless water heaters have different price ranges depending upon the features and the size. Some are expensive initially but balance out with the usage cost. In comparison, the cheaper water heaters have high usage and are not economical at all.
The electric tankless water heaters have a simple installation process and are budget-friendly as well. But after using it for quite some time, you will witness that it has a high cost of electricity. It might not be compatible with the house’s electric system, and you will have to upgrade, which is a complicated process.
On the other hand, propane gas is costly and has to be bought in tanks. This does not run into the pipes or through the wires into our homes. They need a refill after every day or two, which is a significant hassle. We do not suggest buying propane water heaters as they are very impractical.
Natural gas is available in every house and is less costly than electricity and propane gas. The tankless water heater powered by natural gas is the most convenient to use and has a low price. They might be expensive but are very economical, having low usage per year. It is recommended to buy gas tankless water heaters as they have a long life and are reliable.
Flow Rate
The flow rate of a tankless water heater is essential as it tells about the capacity of the heater to produce hot water. It is measured in gallons per minute and depends on the usage of the individual. Different ranges are present from 3 GPM to 9 GPM and shall be bought according to your use.
A high flow rate is necessary for the fixtures commonly used, such as the showers or dishwashers. Similarly, if the fixtures are rarely used, a low flow rate will work fine for it. The tankless water heaters can be used as a single or with multiple junction points as well.
Power Input
Power input is the energy that heats the water and raises the temperature. The power input for the gas tankless water heater shall be very high as multiple gallons might be needed in a minute. So high power input is necessary to heat the water quickly, so you do not have to wait for hours before the water heats up. If a single fixture is in use, 100% of efficiency is expected.
Condensing and Non-Condensing Units
If any of the fuel is used, it will produce vapors or steam as a byproduct. Non-condensing water heaters are manufactured with materials that can promote ventilation as it is a requirement. In this process, heat is lost, which reduces the efficiency to 80. These might be cheaper to buy but decrease the efficiency. At the same time, the water heaters with a condenser have high efficiency up to 98. They might be expensive but reuse the heat.
Frequently Asked Questions
What brand of gas tankless water heater is the most reliable?
Rinnai is the most reliable brand that manufactures the gas tankless water heater with a high flow rate per minute. These are suitable for all families, whether small or big. They have a high efficiency of 96 while the heaters have worked for more than two decades.
What is the downside of the tankless water heater?
The tankless water heaters are expensive as compared to the heaters with a tank. The installation process can be pretty complicated, which automatically increases the cost of the unit.
Can a tankless water heater fill a tub?
Yes, a tankless water heater can fill a tub and does not run out of hot water unless it exceeds the hot water limit produced by the heater.
Conclusion
We come to an end of the lengthy list of the best gas tankless water heaters with all the pros and cons. These are energy-efficient units with some fantastic features. Among all the eight different water heaters, the best three which are my absolute favorite are:
- Rinnai RU160iP Gas Tankless Hot Water Heater has a maximum flow rate of 11 GPM and is Energy Star Labelled.
- Eccotemp i12-NG Tankless Water Heater for its electronic ignition system and LED screen display.
- Rinnai RUR98iN Natural Gas Tankless Water Heater for its high efficiency of 96 and dual heat exchanger.
Hence these are the best gas tankless water heaters that fulfill all your hot water demands efficiently. After reading all the information provided, I hope you can make an intelligent purchase for your house, keeping the cost and features in account. It might seem an expensive investment, but it is worth it.
