Best Tankless Gas Water Heater

Best Tankless Gas Water Heater

Best Tankless Gas Water Heater: Before you go to the store to buy the tankless gas water heater, you should get accustomed to various tankless gas.  This is because there are several gases on the market. Maybe you are searching for the best tankless gas water heater, then I will suggest this article is for you.

To get a full range of benefits, it’s super important to choose the right water heater for your household-specific needs.  Although this equipment can be costly because the gas units require you to install proper ventilation ports.

There are a wide variety of gas tankless water heaters currently available in the market.  We have spent more than 100 hours researching and make a little easier for you. However, despite the fact they polluted the environment, consumed large spaces in our homes. Below, we come up with the eight best gas tankless water heaters available.

Some Quick Tips About Gas Water Heater:

  1. Best Buy Tankless Water Heater
  2. How To Install A Tankless Water Heater Yourself
  3. How Does An Electric Tankless Water Heater Work

8 Best Tankless Gas Water Heater Reviews 2020

We can Check 10 Best Tankless Gas Water Heater Products List:

1. Eccotemp i12-NG Tankless Water Heater

Eccotemp i12-NG Tankless Water HeaterThe first thing that you notice with this unit is its design, with the black color dominating. Eccotemp is no stranger to making some of the fantastic water heaters on the market right now. Another thing you focus on the LED display on the front. The touchscreen display is not only pretty but also simple to use to adjust the temperature. However, the model has a regular shape that should make using it something great. If you notice the temperature drop below freezing, make sure to drain and disconnect the unit—no need to worry about the installation process.

The manufacturing company will provide you with 2 -years limited warranty on the product. The overall measurements are 16 x 16 x11 inches. But for the flow rate are at optimum 3GPM at a 40degree rise. It is, therefore, one of the best tankless water heaters. It will need a minimum of 120-volts outlet to make it work great. The users like it also for the design that has to offer. The factory testing confirmed that you should use the unit at up to 5500 feet of altitude. The sleek black acrylic glass casing makes it look amazing. You should have a great time at all times when it comes to using it.

The maximum flow rate of the model makes it be among the favorites on the market right. Therefore, it comes with a flow rate of 3GPM. Therefore, this might not be the most significant flow rate, but definitely among the best to keep supply the hot water for your needs. It should, therefore, enough to serve a small household adequately.  The new version of the Eccotemp i12-NG water heater is well made.

Key Features:

  • Weight: 28.9 pounds
  • Color: black
  • Wattage: 1440 watts
  • Warranty: 2 years limited
  • The water fitting segment is ½ NPT (National Pipe Thread)
  • It can be used in high elevation up to 5500 fully field-tested
  • Operated and functioned by natural gas in indoor places
  • Another thing the system inputted with automatic temperature control
  • The hot water capacity range is very high from 0.6 to 4.8 gallons per minute
  • The minimum and maximum BTUs GAS RATE IS 25000 and 8000
  • GPM flow and output temperature are shown via LCD screen with touch display


  • Comes with a smart look
  • Impressive flow rate for the water
  • It comes with excellent quality for the construction
  • Customer ratings are 4.3 out of 5, which is excellent and unbelievable.
  • Emits no harmful chemical or gas because it is eco friendly
  • It has tested the electronic ignition system in case of any fire or flame or disasters.
  • The Eccotemp i12-NG water heater comes with full warranty and support for two years


  • It is only suitable for the small household
  • Works better in smaller areas like cabinet, bathrooms, and rooms
  • Installation cost may occur in case of the ventilation as it requires large pipes and accessories, but other than this no fee will be added.
  • The price will look less if you compare to its feature

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2. Rinnai RL94iP Propane Tankless Water Heater

Rinnai RL94iP Propane Tankless Water HeaterComing up next on our list is the RL94iP. This unit runs on either natural gas or propane, has a high flow rate, it can be installed indoors or outdoors, and comes certified for the manufactured homes. Another important thing, it can support most residential homes. This RL Series HE+ has an 81% energy efficiency rating that is approved for high altitude when using. It also has a flow rate of 9.8 GPM  and will accommodate up to five bathrooms simultaneously. Made of GPM hot water showers uses it from 2 to 2.5 of the GPM. The unit is also available for the condensing and non-condensing models. Therefore, it can save energy costs and also able to a rich set of features.

If you are looking for the best tankless gas water heater, this is also another great we can recommend to anyone who is looking to purchase. Although the best thing you will love about this unit apart from power it is an indoor unit. It has a space-saving design and optional WiFi module for remote monitoring and management. You can have the unit installed indoors, making it less of the hassle to deal with installing one outdoor. Another important of this unit comes with a digital controller and relies on the electronic spark ignition. It has an incredible digital controller that allows you to adjust the temperature somewhere between 98 and 140 degrees. It also weights a high-capacity flow rate, energy efficiency, potential energy savings, and even flexible installation.

It also comes with a freeze protection system because of an indoor unit. This is why we encourage you to check the one that has 12-years warranty on the heat exchanger, and also five-years parts warranty and finally one year on labor.

Key Features:

  • Weight: 44.3 pounds
  • Size: 9.4 GPM
  • Color: RL94In- Natural Gas/ 9.4 GPM
  • Endless hot water for your entire home
  • Warranty: 120 month( heat exchanger), 12 month (labor), 60 months 10,300 BTU (minimum)
  • Circ- Logic technology allows you to set recirculation designs that coincide by your characteristic habits.


  • Very powerful
  • Indoor unit
  • Energy star qualified
  • Low flow rate is pretty good for our needs
  • Modulated burning allows for less fuel consumption
  • No standing heat loss or pilot light
  • Group uses direct powered vent.
  • Highly efficient


  • Require maintenance at times though not often
  • It is not easy to repair them as a simple water heater
  • The system requires clean power due to sensitive circuit
  • Expensive
  • The cold water sandwiches

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3. Merely Power Propane Gas Tankless Water Heater

Merely Power Propane Gas Tankless Water HeaterHowever, Marely Power Gas 10L Digital Panel Tankless water heater is one of the smallest and cheapest tankless gas water heaters. This may be the best tankless gas water heater for you. It is capable of saving up to 60% of electricity bills. This type works best mainly in the areas with high in-flow of the water temperature. This tankless gas is made of the quality and durable constructions. Since it is 3.1, the GPM yield is insufficient for anything more than the necessary hot water needs.

The outer casing is made of the aluminum-magnesium alloy casting, which consists of the durable stainless steel. It also made of the withstanding extremely high temperatures. Another thing you should note is that construction is resistant to rusting.

It provides an endless hot water flow whenever needed. This is enhanced by the no electrical connection that is required for the water heating, thus the ideal heater for the water heating—made of the battery-powered automatic ignition.

Key Features:

  • Weight: 23 pounds
  • Color: silver
  • Digital temperature display
  • The system does not need electricity
  • This unit has an energy factor that range of 87% to 54%
  • It provides a maximum flow of the 3.1 gallons per minute
  • Independent knobs control both of the gas pressure and the water flow rate.
  • It is easy to read digital display that ensures accurate and precise program


  • High rise wind resistance design
  • Smart and energy saving deign
  • High temperature


  • It allows a flow rate of 5.28 GPM.
  • Neither super hot or cold

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4. Complex BW11 Propane Gas Tankless Water Heater

Complex BW11 Propane Gas Tankless Water HeaterIf you are outdoors, then you may need several outdoor items, such as the best tankless gas water heater. The outdoor you should know that always gives people enthusiasm and happiness and sophisticated outdoor. The propane flame instantly heats water once it passes through the unit, then when you feel the water in hot water, it will come out. Here you can enjoy the convenience of hot water even if you are away from home.

The three critical elements of the complex products are; portability, energy-saving, and home appliance. You can do many things using complex; First use for an outdoor shower, use a water heater for bathing your horse and dog too at home. This will provide a relaxing and comfortable sunbath to your animal pet.

You need to know also that water heater is design with an eco or full switch functioning that saves gas. The water heart will utilize to 11.5% energy saving of the technology. We know you will also love the portable nature of the water, thus making it easy to carry. Therefore, it will not care where the water heater provides hot water everywhere.  It then has an output of 68000 BTU/hour to assure you of the endless hot water.

Key Features:

  • Weight: 18.95 pound
  • Size: 8L
  • Turn the ignition on with 2 D cell battery whenever electricity is not needed
  • Applicable water pressure from 3.0- 110.0 PSI. Hot water output 2.11 gallons per minute
  • Has flame failure device and dry combustion protection
  • Its compact and lightweight design ideal for travel
  • It has a maximum power output of 6800 BTU per hour
  • Come with CSA approved gas regulator and required adapters
  • Eco/Full switch function, which saves more gas in the summertime, it works great with complex 12v


  • Easy to carry
  • Safe to use
  • It provides hot water wherever you are
  • Also suitable for indoor use
  • The price is good it also energy efficient
  • Safe electronic ignition system; plugs into standard 120v electrical outlet with UL-listed cord, temperature controls
  • Perfect for campsites
  • The water heater unit protected from the rain


  • You can switch the reading from Celsius to Fahrenheit
  • It goes off without expecting

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5. Gasland Portable Propane Gas Tankless Water Heater

Gasland Portable Propane Gas Tankless Water HeaterThe best tankless water heater for the Gasland Heater works it works well at low water pressure, and it needs only 2.18 PSI to function. The function of propane gas pressure is 0.4PSI, and it uses a power output of 41000btu every hour. This is another portable tankless water heater for a camper you should watch out for, the flow rate of its 1.58 gallons per minute, and is capable of support one of the bathroom that use efficiently. It also weights light and requires no electricity as it works on a 2D cell battery.

If you are reading on this post then you are like in the right place, Gasland AS150 1.5GPM 6L is the best that you can get from users. We spent more than 50 hours researching the best tankless gas, and we believe this post will help you and others. If you are looking for the portable tankless gas that is included in the package except for the propane bottle and battery, thus making them convenient to use outdoor.

When you are searching for the product on the internet, you can shop anyplace. The downside to that is that you will have to get. You can enjoy consistent hot water that flows continuously while using brackets to hang the heater anywhere, and foldable handles to carry or store it wherever you don’t need it. You can easily set up, install, and use the heater by reading the detailed instruction manual provided. The heater also comes with a 5-foot CSA approved regularly. The best outdoor tankless water any other adventures you might be planning on taking.

Key Features:

  • Weight: 15. 65 pounds
  • Size: 6L
  • Dense and frivolous building to brand it even extraditable and right for each kind of outside use. The marine stove can also function if happening the little water heaviness. A measly 2.5 PSI of the source water canister jump up on the boiler element
  • The partderives with added landscapes such as expedient flame disappointment alarm, anti-freezing defence, and also heatreflexclosuredefence.
  • It suggestions and materials a water movement of 1.58 gallons per small, which excites the outdoor and portable radiator to provide hot water.
  • Easy temperature adjustment of the water flow and other for gas. By adjusting buttons, you can comfortably get the temperature of the best suitable for your needs.
  • The smart device equipped: It comes with anti-frozen protection, flame failure detecting device, and overheating shutoff protection and others.


  • Overheating protection
  • It heats water-fat
  • The water stove can be activated only by 2 D cell series instead of exclusively contingent on the electric activate. Thus why is it not valuable for outside use for the home.
  • It heats water-fat
  • Heats up only when hot water is needed
  • The boiler unit is talented of rising the water fever quickly and retaining the high temperature. Moreover, the fever watchdog is easy to usage.
  • Has a flame failure system
  • An on-off button is set on the shower head


  • The connection physical is not water is wanted
  • Most of the significant item comes crowded in the box; it fixes non-appearance about vital fittings such as the water and plot hose.
  • The appropriate of the water heater is set so to British values.You strength tinker about with hygiene while linking the water hotplate.
  • Notwithstanding the apparently robust shape, the similar design thought is not applied in the bath hose. It is not lone unwieldy and large but is accomplished of gusting off.

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6. Rheem RTGH-95DVLN 9.5 GPM Indoor Shortest Vent

Rheem RTGH-95DVLN 9.5 GPM Indoor Shortest VentLook no more for the best 9.5 GPM maximum flow rate. The gas powered tankless water heater with a capacity of 9.5 GPM. This product not only heats up running w3ater almost instantly but can also control the temperature of the water, allowing you to tailor your water supply to your needs. All the power and efficiency comes at the cost that will make it prohibitive for some folks, but if you consume a unique demand for prompt hot water. It is true that similar greatest of the other parts on this list-both inside and outdoor. You can, so, used up to 38 feet of three-inch full PVC pipe.

This is the rare natural gas tankless water heater for big households or small/medium households with high demands. It also deals with tankless models for the folks who never want to think about managing their supply of hot water.

Some of the users will particularly rise that Rhee types its tankless water heater open to being linked together.  You can also function unit suitably if you live in a tall altitude, 9840 feet overhead sea close, and freeze guard of over up to  30 degrees. If you buying cold indoor models will also comprise a distant control along with 10 foot.

Key Features:

  • Weight: 79 pounds
  • Temp range: 85-140 degree Celsius
  • Low Nox version
  • Third-party Energy-efficient listed by AHRI


  • Eco-friendly
  • Wide temperature range
  • Ways to connect multiple units
  • Long warranty
  • Informal to vent from wherever in the residence
  • There is a temperature lock to prevent any unintentional changes to the water infection location and limit.


  • Installation service occasionally suitable
  • Installation can be luxurious and complex
  • It is a bit slower to respond
  • You will need to get a direct- venting kit.

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7. Rinnai V Series HE Tankless Hot Water Heater

Rinnai V Series HE Tankless Hot Water HeaterLook no more for the best natural gas tankless water heater. This is similar to the unit to the Rinnai heater we just looked at. The machine is a propane tankless water heater and is installed outdoor. Therefore, no venting kits are required in the installation. Apart from being made to the installed outside, it shares all the same features with an internal model that make such a great pick. Hence you don’t have to worry about the voltage going up and mobile homes. It is also highly efficient, there is heater from Rinnai HE range, which stands for the High Efficiency and is designed to give you hot water on demand while saving your money on the4 gas bill st the same time.

Rinnai V Series delivers up to 6.6 Gallons of hot water per minute (GPM) at 120 volts. It also has a leak-detection capability that tells the unit if there is a leak and shut it off to help protect property from damage. You can put it under your sink, in the bathroom, or even in the kitchen.

Due to the previous model, it can also be connected to WiFi, and it allows you to control and program it via the dedicated smartphone app for extra convenience.

Key Features:

  • Weight: 47.4 pounds
  • Size: large
  • Natural gas and propane available: It is tankless propane, it is still able to use nature as the main power. The energy factor of it is 0.82, which is quite low.
  • Low NOx design: this unit comprises of South Coast Air Quality management, thus why is less greenhouse gas is let out.
  • Safe installation: It is certified for connection in the manufacture or mobile homes. You can also install it by yourself easily. Apart from that, it enhanced scale detection inside the machine to lessen the possibility of the severe and long term damage to the unit
  • Low working noise: The working noise of the group is too small that you can hardly hear. It, therefore, takes 15 seconds for the water to warm up.


  • Ideal for the external installation; save space inside your home
  • Does not have fabric
  • Smart temperature
  • It has a low NOx design
  • The small shape
  • Fast heating time
  • It uses up to the five fixtures at once, it then depends on groundwater temperature
  • The WiFi connection is possible, and it can be controlled via a smartphone app


  • The water gets cold again once you turn the water off
  • Noisy operation due to the exhaust fan

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8. Noritz Indoor Direct Tankless Hot Water Heater

Noritz Indoor Direct Tankless Hot Water HeaterThe best natural gas tankless water heater is hard to find, but you have to look for the better or so and get comfortable. This Noritz Model is perfect for indoor use. It can distribute up to 6.6 GPM of the water flow for up to three lavatories in the warmer climates. So if you are in the market to buy the best tankless gas water heater, look no further than Noritz NRC66DBNG Tankless Hot Water Heater. They require special exterior ventilation, but only because this is efficiency ratings. Another important thing it produces a fresh exhaust instead of the hot water that will give you more options.

They also come with heater vents through PVC and works well overall. You can also choose from their variety of colors, depending on the GPM water flow. Our goal is to empower you with the highest quality of the products available at the superior value. The manufacture advises overall a fantastic option for abundant hot water needs, especially considering its low cost.

Key Features:

  • Weight: 39 pounds
  • Warranty: 12 years warmth exchanger, five years shares, 1-year labor
  • Low Nox
  • Endless hot water
  • The remote thermostat and six power cord included
  • Can be vented with schedule 40 PVC pipe and fitting


  • High efficient
  • Small footprint
  • Endless hot water
  • Quiet operation
  • Solid, precision-engineered
  • Thorough, logical, easy-to-comprehend instruction
  • Vents with schedule 40 PVC


  • Cold water sandwich it common to almost tankless heaters

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Gas Tankless Water Heater Buying Guide

When you are shop for the best tankless gas water heater, there are a diversity of the factors that you need to deliberate carefully before purchasing. The options in the market were somewhat limited. To help you reach a better decision, here is a list of things you should consider:

  • The Size of Your Household

The size of the unit can have a major impact on the installation process. You may have a large family that tends to use multiple hot water fixtures at the same time. Due to the gas tankess water heater is a fantastic choice for you. Although if you believe on the apartment, you might not need a whole house water heating system.

Therefore, the vital to determine your needs beforehand, you might probably spend a lot of money on the unit that just would not pay off in the future. If you need small sized heater check our out here.

  • Warranty:

coverage for water heaters classically runs three to 12 years. You will frequently pay a bit more for longer-warranty models. The larger rudiments or heats that can speed up water heating and have thicker insulation for the fewer loss. You need to check water heater with lengthiest warranty obtainable.

This should keep you protected for longer just in case the model ends up with a few damages.

  • Digital displays:

It help, you monitor levels and modify operation. If you essential electric or warmth pump hybrid water boilers let you usual a break mode usage just heat drive to add efficacy. Due to the development in technology, you can also expect the same in the world of the water heaters. The various model would have monitors that help you with knowing more information about how it works.

The display in solar water heater often show tank and collector temperatures, with pressure readings and other information. It is therefore important to always get the right model with the best digital display.

  • Flow rate

This is another important consideration when picking a tankless heater unit. The flow rate will determine just how much access you have to hot water. Most of the people ask various flow rates before deciding to purchase water heaters. However, if you need to spread across a couple of the showers and kitchen sinks.

You need to know also having a higher flow rate is often the best thing. It also means that you can end up with a model that can deliver hot water once you want it do that.

  • Anti-scale devices

Some of the models right nowadays, manufactures are tying to keep them from having mineral build up issues. While scale can shorten the life of the heating element, therefore, you don’t need to invest in the fancy features to get water heater that lasts.

The reason why you should consider getting a model that works countless and hence, keeps the minerals from structure up.

  • Construction

Everyone will need to get a model that comes with the best construction. Therefore, having a strong construction makes the model last for long. Another thing you should not worry about replacement soon.

Some of the models even come with a corrosion resistant interior. Note that the surface will always be exposed to water, it is nice idea to make sure that it is made to the corrosion resistant.

  • Energy star

Another important factor today owning water heaters, they want one that comes with an energy star rating. The energy star rating means that the model can deliver on some of the best energy efficiency that you need.

You are advised always to be good when it comes to the overall use of such model. Therefore, always great knowing that you can save more when using a certain type of the model.

  • Ventilation

Every gas-powered units it has a sure ventilation rate obligation. However, they only clean burning natural gas but it gasses still exhaust. You will essential to install an passable venting system.

Final world

The above are just few best tankless gas water heaters. You should have a great time when it comes to the overall use of these water heaters. By following the information outline in our buyer guide you should be well on your way to find the perfect one. Finally, take the time to compare the several models before making up your mind.

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