Best outdoor natural gas tankless water heater in 2022 – BestHeaterGuide

Tankless water heaters are gaining popularity by the day. People are looking for a tankless water heater to meet their hot water demands. many of which upon researching have come to know that natural gas tankless water heaters are more robust and can face any kind of climate and environment easily and much better than an electric tankless water heater. They are also are cheaper to operate, hence you make a daily saving on your utility bills.

However, Natural gas tankless is not without faults. The biggest issue associated with a natural gas tankless water heater is exhaust gases and venting requirements. A natural gas tankless water heater uses gas combustion to heat water. During this process, some harmful by-product gases like carbon monoxide are released. Although the latest tankless water heaters have reduced the level of emission of these harmful gases they are not free from it. This minimum level of emission is not a problem when vented outside in an open environment. But same cannot be said when these gases are released in closed indoor environments as they can lead to health problems and may be life-threatening with prolonged exposure to them. That’s where the best outdoor natural gas tankless water heater becomes so much more attractive. But every outdoor natural gas is not the same. Not all tankless water heaters can face harsh climates.

Quick Shopping Picks for best outdoor natural gas tankless water heater

Budget Pick

Takagi T-Kjr2-OS-NG is the most budget friend choice in our list of the best outdoor tankless water heaters. it has a robust design and multiple safety mechanisms to meet all kinds of climates.

Best Pick

Rinnai RUR199EN is the best pick due to its advanced features that will no doubt give you the most luxurious experience however it is not cheap.

Staff Pick

Takagi T-H3-OS-NG is the staff choice for having more advanced features but still in an affordable range. you can surely get the most value of your investment through this unit.

At a Glance:

Our recomendation for Top 8 Best outdoor natural gas tankless water heater

As more and more people are looking for the best outdoor natural gas tankless water heater, we have decided to put together a list of the best 8 outdoor natural gas tankless water heaters that are currently available. These water heaters have been evaluated based on their price, performance, durability, and reviews from consumers. Hence, you can be sure that you are getting the best value for your money.

Without further ado, here are the top 8 best outdoor natural gas tankless water heaters.

DesignTankless Heater BrandsRetailer
1. Rinnai RL75EN Outdoor Natural Gas Tankless Water Heater
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2. Rinnai RL94EN Outdoor Tankless Water Heater
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Staff Pick3. Takagi T-H3S-OS-N Condensing Natural Gas Outdoor Tankless Water Heater
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4. Rheem RTGH 9.5 GPM Outdoor Tankless Water Heater
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Best Pick5. Rinnai RUR199eN Condensing Tankless Hot Water Heater
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6. Noritz NRC661ODNG Outdoor natural gas Condensing Tankless Water Heater
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7. Rinnai V65EN outdoor natural gas Tankless Water Heater
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Budget Pick8. Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater
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1. Rinnai RL75EN Outdoor Natural Gas Tankless Water Heater

Rinnai RL75iN Tankless Water Heater
Rinnai RL75iN Tankless Water Heater

Today, more than ever before homeowners are searching for ways to lower energy costs and save money. The Rinnai RL75EN Ultra Series Outdoor Natural Gas tankless water heater is designed to do just that with its high efficiency, performance, high flow rates, and large temperature range. This Rinnai outdoor tankless water heater is good enough to meet your every household demand. It has powerful heat exchangers that are designed to give you up to 7.5 gallons per minute of flow rate. It can deliver uninterrupted hot water without any hiccups. It does all this while ensuring the highest energy efficiency you can get in a non-condensing tankless water heater. Let us go over the major features of the Rinnai RL75EN to give you a clear understanding of whether or not it is right for your home.

FEATURES

Wifi connectivity

This unit can support wifi connection with the help of an accessory that you can purchase separately. It doesn’t have this build-in which is quite common with most tankless water heaters.

Frost and surge protection

This Rinnai RL75EN is your guy if you want continuous hot water even in the coldest of temperatures. It has freeze protection modes that automatically ignite the flame to warm the unit in case it reaches freezing temperature. If there is any risk of the surge, this unit shut down to protect the unit.

Low NOx

According to the manufacturer, this unit has a low nitrogen oxide emission. Due to its novel burner technology and combustion chamber. Hence, it can even meet the stringent conditions of SCAQMD for NOx emission.

Warranty

The Rinnai RL75EN Ultra Series Outdoor Natural Gas Tankless Water Heater comes with a limited warranty that covers heat exchangers for 12 years, parts for 5 years, and labor for one year.

Certified

AHRI certified CSA certified, SCAQMD compliance,

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Minimum flow rate activation is 0.4 GPM
  • Operates at a water pressure of 50-150 psi
  • Circuit voltage of 120V
  • Water and gas connections of ¾ inches NPT are supported.
  • Minimum and Maximum BTU requirement is 15,000/199,000

Specifications

  • Color: Silver metallic
  • Weight: 43.7 pounds
  • Dimensions: 23H x 14W x9D inches

Pros

  • Energy efficient
  • Wifi connectivity
  • Frost protection
  • Easy to install
  • Highly portable

Cons

  • Expensive

Why you should buy this?

If you want to conserve energy and money, it’s a great option for your home. This unit has features that will not only produce hot water but also help you save money. Plus this unit comes with a 12-year superior warranty that you can depend on.


2. Rinnai RL94EN Outdoor Tankless Water Heater

Rinnai RL94eN Tankless Hot Water Heater
Rinnai RL94eN Tankless Hot Water Heater

If you’re looking for a strong outdoor natural gas tankless water heater, the Rinnai RL94eN is a great option. It has a high capacity to deliver a high flow rate of 9.4 gallons per minute. This is a perfect choice for your outdoor natural gas tankless heater. You can install it outside the house and enjoy an uninterrupted hot water supply for many years to come. Not just this, you will also get reliable customer service from Rinnai Company, if you have any product-related issues. That’s not all; it comes with Wi-Fi controls that ensure the most convenient experience. However, its winning point is its CircLogic Technology.

FEATURES

Self-modulation

Rinnai RL94EN’s Heat exchanger modulates the heat up and down to deliver hot water at an efficient energy rate. It responds to your flow changes, keeping you comfortable with the economical usage of energy.

Freezing, Overheating and Electrical surge protection

Rinnai RL94EN has built-in freeze protection, overheat protection, and electrical surge protection. All these protection make it a robust unit against any kind of condition. It will take various actions depending on the issue. Like in the case of overheating, it will shut down the tankless unit. The unit will automatically restart after it has cooled down.

Low NOx

If you want to make a move towards green emissions you have found out the right tankless water heater. It emits very low NOx, making it an ideal choice for an eco-friendly lifestyle.

Circlogic

This technology operates with an external recirculation pump to provide a more consistent and efficient flow of water. It provides you with a consistent supply of hot water or energy even when the demand changes. You can set up a custom schedule for your household requirements through Rinnai’s smartphone app from anywhere in the world.

Warranty

Rinnai RL94EN is covered with a high-quality appliance parts warranty that covers labor costs for 1 year. Also, the Heat exchanger is covered with a 12-year warranty and the parts are covered with a 5-year warranty.

Certified

CSA certified, Energy star certified, AHRI Certified, SCAQMD approved, ANSI certified.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Minimum flow rate activation is 0.4 GPM
  • Operates at a water pressure of 20-150 psi
  • Circuit voltage of 120V
  • Minimum and Maximum BTU requirement is 10,300/199,000
  • Water and gas connection should be ¾ in. NPT

Specifications

  • Color: Silver metallic
  • Weight: 44.2 pounds
  • Dimensions: 23.4H x 14W x9.6D inches

Pros

  • Wifi and recirculation ready
  • Frost, overheating, and surge protection
  • Easy to install
  • Superior warranty

Cons

  • Very expensive

Why you should buy this?

This tankless water heater has got it all, from space-saving to energy efficiency, from the ease of install to ease of use, and from higher performance to highest durability. As a result, it is among the top ten best outdoor natural gas tankless water heaters available.


3. Takagi T-H3S-OS-N Condensing Natural Gas Outdoor Tankless Water Heater

Staff Pick

Takagi T-H3S-OS-N Condensing Natural Gas Outdoor Tankless Water Heater
Takagi T-H3S-OS-N Condensing Natural Gas Outdoor Tankless Water Heater

Takagi T-H3-OSNG comes with a sleek design and can provide you with 9.8 GPM. It is powerful enough to meet all your demands even with high-end usage like powering multiple showers at once. It also comes with an induced draft fan that can keep operation noise at a bare minimum.

While its multiple protections mechanism protects it from any damage against any kind of environment. It is a valued tankless water heater that offers more than it is priced at. It is a budget-friendly tankless water heater among high-end tankless water heaters. By far none of the other tankless water heaters is priced at where it is while providing what it does. Not to mention, you will also get great support from Takagi customer service.

FEATURES

Self-modulation

This feature helps to ensure the water is heated precisely, and efficiently. It also saves you more money in reduced energy costs.

Freezing, overheating, and surge protection

This model comes with self-protection that ensures your machine will be safe from any kind of issues caused due to freezing or overheating. Additionally, Surge protection is also included to protect against any potential damage.

Low NOx

This model provides you with a lower amount of NOx released into your environment. This ensures that the atmosphere is safe and at the same time produces clean hot water for use.

Dual Copper and Stainless Steel Heat Exchangers

The machine comes with dual copper and stainless steel heat exchangers that ensure heating is quick and efficient. It also makes the machine last longer than expected.

Warranty

This unit comes with a superior 15-year warranty on the heat exchanger and a 5-year warranty on all parts. You can be sure that your machine will last long enough.

Certified

AHRI certified NSF certified, Energy Star certified, SCAQMD compliance, ANSI certified and CSA certified.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation Flow Rate of 0.40
  • Operate on the water pressure of 15-150 psi
  • A 120V power source
  • Water and gas connections require ¾ inch NPT.
  • Condensate drain supported with ½ inch NPT
  • Minimum/maximum BTU requirements are 15000 to 199000 BTU’s

Specifications

  • Color: White
  • Weight: 69 Pounds
  • Dimensions:23.65H x 17.75W x 11.25D inches

Pros

  • Uniform energy efficiency of 95%
  • Multiple Protections for all kinds of weather
  • Low NOx
  • Affordable
  • Japanese Technology

Cons

  • Doesn’t have built-in Wifi and recirculation system

Why you should buy this?

If you want a tankless water heater that is worth every single penny, then Takagi T-H3-OS-N is just the machine for you. It offers excellent value for money, with superior quality and performance. It is one of the best tankless water heaters out there with all the features you could ever expect from a reliable unit.


4. Rheem RTGH 9.5 GPM Outdoor Tankless Water Heater

Rheem RTGH-95XLN Prestige Natural Gas Tankless Water Heater
Rheem RTGH-95XLN Prestige Natural Gas Tankless Water Heater

Rheem RTGH-95XLN Outdoor Tankless Water Heater is a Natural Gas-powered condensing unit. It’s one of the most effective outdoor units on the market today. It has high power which gives it the capacity to deliver up to 9.5 GPM of hot water.

It also comes with great accuracy thanks to its digital controls. Set your preferred water temperature and let your tankless water heater handle the rest. It will do the job for you at an all-time even when demand increases or decreases. It also has self-diagnostics capabilities that make it more efficient for outdoor use. Hence, it will proactively report any conditions that might affect its performance before they actually happen.

It will work great for the whole house and the fact that it has a sleek design makes it an even better choice for you.

FEATURES

Wifi capability

You can control it through the internet thanks to its Wifi functionality. You’ll be able to monitor its status in real-time with just your laptop or mobile device.

Recirculation ready

The Rheem RTGH-95XLN Outdoor Heater is also designed for recirculation pump use. This means that it has already been programmed to work with the recirculation pump. You need to just buy it and put it into action.

Built-in condensate neutralizer

This Rheem RTGH 95 also comes with a built-in CSX condensate neutralizer which protects the unit and drain pipe from being damaged by acidic condensate.

Ultra-low NOx

The Rheem RTGH-95XLN Outdoor Tankless Water Heater is a Natural Gas-powered condensing unit. It uses ultra-low NOx technology to minimize nitrogen oxide emissions.

Warranty

This device comes with a 12-year heat exchanger guarantee, a 5-year parts warranty, and a 1-year labor warranty.

Certifications

UPS, CSA, AHRI, and Energy Star Certified,

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.40 GPM
  • Water pressures of up to 150 psi are supported.
  • Minimum and Maximum BTU’s input is 11000-199000
  • Water and Gas connections are ¾ in. NPT
  • Requires electrical voltage of 120v
  • Uses 100 watts for normal operations and 200 Watts for the anti-freeze mechanism

Specifications

  • Color: Grey
  • Weight: 81 pounds
  • Dimensions: 27.5H x 9.75D x 18.5W Inches

Pros

  • The energy efficiency of 94%
  • Wifi and Recirculation ready
  • Ultra-low NOx
  • Built-in neutralizer for condensate

Cons

  • You need to install external accessories to benefit from the Wifi and recirculation facility.

Why you should buy this?

The Rheem RTGH-95XLN Outdoor Tankless Water Heater is a really nice product for the price. It offers lots of capabilities like Wifi control, self-diagnostic features, and condensate neutralizer as well as great style and design. All this really makes it a top-notch product that you can rely on all the time.


5. Rinnai RUR199eN Condensing Tankless Hot Water Heater

Best Pick

Rinnai RUR199eN Condensing Tankless Hot Water Heater
Rinnai RUR199eN Condensing Tankless Hot Water Heater

Rinnai RUR199EN is a powerful unit that has a capacity of delivering 11 GPM which is great for houses having multiple users at once. With it, you will be able to enjoy great savings on your monthly energy bills, thanks to its energy-efficient design. While it’s durable construction allows it to last for a long time without any problems. It ensures the most convenient experience by providing Wi-Fi-connected controls to users. Its uniqueness comes from advanced ThermaCirc Technology that makes it capable of delivering hot water at first instance. For this, it uses a thermal bypass valve which allows it to recirculate the cold water back to the tankless unit. All these features make it one of the top 3 outdoor natural gas tankless heaters on our list.

FEATURES:

ThermaCirc Technology

ThermaCirc technology allows the Rinnai RUR199en to circulate the cold water back to the unit for reheating. This ensures that you get instant hot water upon opening a fixture.

Wifi controllable

This feature allows you to check its operation from any remote location, so you don’t have to go out in cold weather to shut it down when not in use.

Ultra-low NOx

This feature makes this unit capable of producing 97% less nitrogen oxide, so there is no need to worry about harming the environment.

Self-diagnostic error codes

It ensures easy installation and service by providing you with a list of error codes that can be easily identified.

Warranty

This unit comes with warranty coverage of 15 years on heat exchangers, 1 year on labor, and 5 years on all parts.

Certifications

SCAQMD compliance, Energy Star certified, CSA

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.40 GPM
  • Normal operation use 81 watts while the anti-freeze mechanism uses 152 watts
  • water pressure should be 60-80 Psi
  • Voltage need of 120v
  • Gas supply pressure should be between 3.5-10.5 in. w. c.
  • Water and Gas fittings support ¾ in. NPT
  • BTU’s input needs to be more than 15000 and less than 199000.

Specifications

  • Color:White
  • Weight: 64 pounds
  • Dimensions: 18.5W x 27.9H x 12D inches

Pros

  • Energy Star
  • Wifi capable
  • Recirculation capable
  • The energy efficiency of 94%

Cons

  • Very expensive

Why you should buy this?

Its modern design and advanced features ensure that you get everything you need in an outdoor natural gas tankless water heater. Such that it can solve all your water heater needs for upcoming decades.


6. Noritz NRC661ODNG Outdoor natural gas Condensing Tankless Water Heater

Noritz NRC661ODNG Outdoor natural gas Condensing Tankless Water Heater
Noritz NRC661ODNG Outdoor natural gas Condensing Tankless Water Heater

Noritz NRC661ODNG Outdoor Tankless Water Heater offers you a hot water capacity of 6.5 GPM. This tankless water heater comes with durable construction which includes the use of stainless steel for corrosion resistance. As a result, it can perform admirably throughout life, even in difficult weather conditions. For this, Noritz has added its own patented high-performance elements to ensure better durability and a longer life span. The low NOx emissions make it an eco-friendly tankless water heater. It also has built-in Wi-Fi, making it simple to control even when there are no physical connections.

FEATURES

Self-modulating burner

Noritz NRC661OD NG Outdoor Tankless Water Heater comes with a self-modulating burner. So you can always get the right temperature instantly without any delay. This way it is able to save both energy and water.

Low NOx

Noritz NRC661OD NG Outdoor Tankless Water Heater is manufactured with the latest technology for reduced NOx emissions. This also ensures that all its customers get a best-in-class tankless water heating experience.

Safety Features

Noritz NRC661OD NG Outdoor Tankless Water Heater comes with automatic freeze protection. This is a safety feature that ensures that when the temperature gets too low the water heater shuts down and prevents damage to its internal parts. Also, it has a safety lock-out so you can prevent innocent kids from messing with its setting.

Wifi capable

It also comes with Wi-Fi capability which makes it easy to control even without any physical connections. You can monitor and control your water heating system remotely by using the free mobile app.

Warranty

A Noritz NRC661 warranty includes 12-years coverage on heat exchanger, 5-years coverage on parts, and one-year coverage on labor.

Certifications

Certified by ANSI and (CSA), certified by NSF, complies with SCAQMD, Certified by Energy Star, UPC certified

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • The minimum activation flow rate is 0.5 GPM
  • Operating pressure is 15-150 psi
  • Needs 120v circuital voltage
  • Power consumption for normal operations is 51 Watts and 141 watts for freeze protection
  • Support Water and gas pipe fittings with ¾ in. NPT
  • Support Condensate Drain of ½ in. NPT
  • Operate on 15,000 BTUs to 140,000 BTUs

Specifications

  • Color: Beige
  • Weight: 36 pounds
  • Dimensions: 20.5 in. height, 13.8 in. width, and 6.7 in. depth

Pros

  • The best budget for small and medium-size families.
  • 91% energy efficiency
  • Certified by Energy star
  • Low NOx
  • Durable Heat Exchangers

Cons

  • Limited power, may not work in colder regions

Why you should buy this?

Experience the joy of enhanced saving with the Noritz NRC661OD condensing tankless water heater. A robust unit that can accompany you for many years easily.


7. Rinnai V65EN outdoor natural gas Tankless Water Heater

Rinnai V65EN outdoor natural gas Tankless Water Heater
Rinnai V65EN outdoor natural gas Tankless Water Heater

The Rinnai V65EN outdoor natural gas Tankless Water Heater is the best choice for all those looking to keep their total appliances low without sacrificing too much on comfort and convenience. With this model, you can save more money thanks to its energy-efficient design that requires little to no maintenance.

It provides up to a 6.5 GPM flow rate. This makes it optimal for multiple users at the same time. When in use, it has a digital control system that ensures precision and efficiency. On top of that, this model has also been deemed efficient by several customers. This means that you can save more money on your monthly bills without sacrificing too much on comfort.

FEATURES

self-modulation

being a smart tankless water heater, it comes with a self-modulation system. What this means is that the Rinnai V65EN will automatically adjust its heating power according to the need and requirement of hot water, ensuring maximum efficiency at all times! This not only saves you energy and money in the long run but also minimizes wear and tear on the unit, making it last longer.

wifi capable

The Rinnai V65EN also comes wifi enabled, meaning you can control it remotely with your smartphone or other devices. This gives you added convenience and flexibility, allowing you to heat your water exactly when you need it – even if you’re not at home!

freeze protection

Another notable feature is its freeze protection. What this means is that the Rinnai V65EN features an anti-freeze setting that will keep it safe even in freezing conditions. This ensures you never run into any issues, allowing you peace of mind every time you use it!

Warranty:

Heat Exchanger warrants 10 years warranty on heat exchanger, five for parts and one for labor.

Certifications

CSA certification ensures that this product is safe to use. NSF certified This unit is also energy star certified.

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Venting Requires 5 inches, Concentric Venting
  • Water pressure of 20-150 psi for normal operation
  • Minimum/Maximum BTU required ranges between 10,300/150,000
  • Voltage should be 120V
  • The flow rate for activation is 0.40 GPM
  • Gas and water connections are compatible with ¾ in. NPT
  • Minimum/Maximum Wattage required is 3-44 kWh

Specifications

  • Color: white
  • Weight: 46 pounds
  • Dimensions: 14.04 inches in width, 26.9 inches in height, and 9.27 in-depth

Pros

  • Low NOx
  • Scale Detection
  • Self-modulation
  • Affordable

Cons

  • No recirculation capability

Why you should buy this?

It is ideal for customers who look to keep the money in their pocket without sacrificing too much on comfort and convenience. This model has many of the same qualities as other models, but for an affordable price. It’s not only efficient and powerful but also simple to set up.


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

Budget Pick

Takagi T-KJr2-IN-NG Indoor Tankless Water Heater
Takagi T-KJr2-IN-NG Indoor Tankless Water Heater

Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater is not only energy efficient but also comes with several unique features that give you even more of the convenience that you have been looking for.

This tankless water heater has a hot water capacity of up to 6.5 GPM. It also comes with a low NOx emissions design which decreases the number of harmful emissions that are released into the atmosphere. This makes this unit eco-friendly and doesn’t result in harming the environment or your health. All in all, this tankless water heater will be your companion for many years to come without running into problems. It has a lot of safety features that ensure that it can withstand any kind of climate or circumstance.

FEATURES

Self-modulation

The self-modulation feature of this tankless water heater will ensure that it can adjust to any kind of temperature. It can also track the temperature and offer hot water on demand.

Safety mechanisms (against Freezing, overheating, and electrical spike)

The safety mechanisms of this tankless water heater will prevent your unit from getting damaged. Its smart technology ensures that it can withstand all kinds of weathers conditions. This unit will stay safe even if the temperature drops or water gets overheated or there be an electrical spike. You will be safe and able to continue to enjoy a hot shower.

Error Codes

This feature basically provides you with error codes that will help you to easily identify the problem in your unit. This is a great feature as it allows you to save money and time by not going through a lot of hassles trying to repair the unit yourself.

Warranty

This product has a 12-year heat exchanger guarantee and a 5-year components warranty. In addition, there is a one-year labor warranty. However, in order for this warranty to be effective, the item must be installed by a professional.

Certifications

ANSI certified UPC certified, CSA certified, Energy Star Certified,

Unit’s requirements

      This module needs the following requirements for proper functioning; 

  • Activation flow rate is 0.40 GPM
  • Water pressure supported between 15-150 Psi
  • Voltage demand is 120v
  • Normal operation requires 73.1 Watt while freeze protection uses 111 Watts
  • Gas supply pressure should be 5-10.5 WC
  • Water and Gas connection support ¾ in. NPT
  • BTU’s input demand is 19,500-140,000

Specifications

  • Color: White
  • Weight: 28.7 Pounds
  • Dimensions: 20.5H x 13.8W x 6.7D inches

Pros

  • The energy efficiency of 82%
  • Durable build
  • Built-in safety mechanisms to face all environments
  • Affordable

Cons

  • Lack of advanced features like Wifi or recirculation capability

Why you should buy this?

This tankless water heater not only saves a lot of energy but also provides hot water on demand. It’s ideal for usage outside because it’s composed of tough materials that can survive the elements. While its error codes make this unit a user friend by letting you know what the fault is.


Buyer Guide for Outdoor Natural Gas Tankless Water Heater

Price and Flow rate

One of the most common factors when deciding on a tankless water heater is its price. So how to know which price is reasonable and which is not. A good starting point is to price 1 GPM of flow rate at $100 per unit. Hence, a tankless water heater with 5 gallons of output should be priced at around $500. However, this is not universal, you can expect a hike in prices after $1000 as at that stage the flow rate doesn’t increase but a lot of advanced features are added. Similarly, prices rise in the winter compared to the summer.

Other than this, you may see minor variations in the price of a tankless water heater depending on the brand you are purchasing, and whether or not there are any special features that are being added to the unit. Also, if you purchase a unit with a warranty plan, this may also increase how much you pay for your new unit. Remember that the flow rate or hot water output of a tankless water heater is susceptible to temperature rise.

Consumer rating for outdoor natural gas tankless water heater

In general, if you see many negative reviews about an individual unit being faulty, so it’s usually not a reflection on the manufacturer. Most of the time it is a misinterpretation of tankless water heater capabilities on the customer side. In fact, most people who purchase outdoor natural gas tankless water heaters report that they are very satisfied with their purchase. So, be sure to read multiple reviews, this way you will be able to see the common complaints and know what to avoid when shopping for your own unit.

Check and match the heater requirements with your current resources

When you purchase a new unit, you will need to add it to your home’s electrical and plumbing system. Hence, you should always find out what types of connections are necessary and how to make the necessary changes. If you’re not sure you can handle it yourself, engage a professional electrician and plumber. Make sure that your plumber knows what kind of unit you are buying before they start any work! A professional plumber will be familiar with most types of outdoor natural gas tankless water heaters, but it doesn’t hurt to make sure.

Maintenance needs

A regular maintenance routine should be followed by people who purchase outdoor natural gas tankless water heaters. You should inspect your unit on a regular basis and keep the sediment ad scalp from damaging it. This is also a good time to make sure everything is in proper working order, and you should consult the owner’s manual for instructions on how often certain parts of your outdoor natural gas tankless water heater need to be maintained.

Safety guidelines

It is important that people who purchase outdoor natural gas tankless water heaters follow proper safety guidelines for their homes. You are legally obligated to observe the codes of your local government. Like buying appliances with low NOx emission, following plumbing codes and proper installation procedures, etc.

DesignTankless Heater BrandsRetailer
1. Rinnai RL75EN Outdoor Natural Gas Tankless Water Heater
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2. Rinnai RL94EN Outdoor Tankless Water Heater
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Staff Pick3. Takagi T-H3S-OS-N Condensing Natural Gas Outdoor Tankless Water Heater
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4. Rheem RTGH 9.5 GPM Outdoor Tankless Water Heater
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Best Pick5. Rinnai RUR199eN Condensing Tankless Hot Water Heater
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6. Noritz NRC661ODNG Outdoor natural gas Condensing Tankless Water Heater
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7. Rinnai V65EN outdoor natural gas Tankless Water Heater
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Budget Pick8. Takagi T-KJr2-OS-NG Natural Gas Outdoor Tankless Water Heater
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Recommendation

Rinnai RUR199EN is the best outdoor natural gas tankless water heater if you want to enjoy all the luxuries a tankless water heater can offer. It is one of the most user-friendly outdoor natural gas tankless water heaters. however, if you are limited by budget then Takagi T-H3-OS-NG and Rinnai V65EN are also great choices.


Conclusion

There you have it, our list of the best outdoor natural gas tankless water heaters. however, you have to know that not all of them are best for you. The best tankless water heater depends upon your situation and only you can make the best and ultimate decision.

Frequently Asked Questions

Can a tankless water heater go outside?

Yes, tankless water heaters come in all varieties. Some are indoor heaters and are installed indoor; others can be installed outdoors while some are portable and can be installed and taken with you wherever you go.

Can you install a tankless water heater anywhere?

Depending upon the type of tankless water heater, they can be installed at various places while some portable ones can be installed anywhere. However, it is suggested to install it at a place that is closer to the faucets that are frequently used.

Why is my tankless water heater outside?

Depending upon the tankless water heater some are installed indoor while others are installed outdoors. Outdoor tankless waters don’t need a vent and directly ventilate the exhaust gases in the surrounding environment. Such gases are poisonous if accumulated and inhaled in a large amount. That’s why they cannot be installed indoors. An outdoor tankless water heater saves money spent on expensive vent, makes maintenance easy, and are more durable to withstand harsh weather.

Does a tankless water heater have to be installed on an exterior wall?

The majority of tankless water heaters are mounted on the wall. This way tankless water heater saves valuable space in your house. Which you can use as desired. But it doesn’t necessarily have to be so; you can also install it in a cupboard, under the sink, or in some unused corner.


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