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Best Outdoor Tankless Gas Water Heater (2024 Update)

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If you're looking for a reliable and energy-efficient way to supply hot water to your outdoor shower or pool, then a tankless gas water heater may be the perfect solution for you. While traditional tank water heaters store hot water, a tankless gas water heater heats the water on-demand using a gas burner, making them an ideal choice for outdoor use.

Before buying a tankless gas water heater for your outdoor space, there are a few things to consider. Firstly, you need to determine the flow rate of the water you require, as this will dictate the size of the unit needed. You'll also need to take into account the temperature of the water you want, as colder water will require more energy to heat up. Finally, it's worth noting that installation costs can vary greatly depending on the complexity of the setup, so be sure to factor in these costs before making your purchase.

Are you tired of running out of hot water in your outdoor area? Do you want to save energy and money while still enjoying an endless supply of hot water? If so, then a tankless gas water heater may be just what you need. Keep reading to find out more about the best options on the market, and discover the key features that make each one stand out. With our expert advice, you'll be able to choose the best outdoor tankless gas water heater for your needs and enjoy an endless supply of hot water whenever you need it.

10 Best Outdoor Tankless Gas Water Heater

# Product Image Product Name Product Notes Check Price
1
This product is ideal for providing instant hot water for camping, RVs, pet bathing, and other outdoor activities.
2
Ideal for providing instant hot water to outdoor areas with propane fuel source, offering high flow rate and BTU output.
3
It is an outdoor natural gas tankless water heater with a high hot water flow rate.
4
Ideal for outdoor activities such as camping trips and boating, providing instant hot water with digital display and multi-protection.
5
Ideal for providing hot water outdoors with a natural gas source and high flow rate of 7.5 gallons per minute.
6
This product is ideal for outdoor use, such as camping trips or in boat cabins, to provide instant hot water.
7
It is ideal for providing hot water efficiently and quickly for outdoor installations using natural gas as a fuel source.
8
Ideal for outdoor hot water needs such as camping trips, boat cabins, and other similar scenarios.
9
It is ideal for providing hot water in an outdoor installation using natural gas.
10
Ideal for providing hot water outdoors using natural gas, with a high flow rate and energy efficiency.
This product is ideal for providing instant hot water for camping, RVs, pet bathing, and other outdoor activities.
Ideal for providing instant hot water to outdoor areas with propane fuel source, offering high flow rate and BTU output.
It is an outdoor natural gas tankless water heater with a high hot water flow rate.
Ideal for outdoor activities such as camping trips and boating, providing instant hot water with digital display and multi-protection.
Ideal for providing hot water outdoors with a natural gas source and high flow rate of 7.5 gallons per minute.
This product is ideal for outdoor use, such as camping trips or in boat cabins, to provide instant hot water.
It is ideal for providing hot water efficiently and quickly for outdoor installations using natural gas as a fuel source.
Ideal for outdoor hot water needs such as camping trips, boat cabins, and other similar scenarios.
It is ideal for providing hot water in an outdoor installation using natural gas.
Ideal for providing hot water outdoors using natural gas, with a high flow rate and energy efficiency.

1. Instant Heat For Camping & Rv: Airthereal Propane Heater

The Endless Hot Water propane water heater is a reliable and efficient solution that provides hot water instantly, wherever you are. With a maximum power output of 41,000BTU/hour, this water heater delivers 1.58 gallons of hot water per minute. Its heat level and flow rate are fully adjustable, eliminating the need for preheating.

The portable design of this water heater makes it easy to carry and perfect for use during camping trips, in RVs, or for giving your pet a bath. Its compact size and lightweight construction ensure that you can enjoy a hot shower after a long day, no matter where you are.

Installing the Endless Hot Water propane water heater is a breeze. You can hang it using the upper handle or mount it to the wall. Installing the water pipe and connecting a propane tank with the water heater is straightforward and only takes a few minutes.

The propane water heater is designed to save energy and reduce gas consumption. Its burner is crafted to minimize gas consumption and combustion noise, saving you 11.5% on your gas bill. This means you can get more hot water for less money, making it an excellent investment for your home or outdoor adventures.

This propane water heater is also equipped with safety features that protect you and your family. A flame sensor automatically shuts off the gas if the flame goes out, preventing accidents from happening. Additionally, the anti-freeze protection drains residual water to avoid freezing during cold spells, while overheating protection prevents hot water from going over 167 degrees.

2. Instagas 120s – Your Instant Outdoor Hot Water Solution!

Looking for a water heater that can provide you with endless hot water supply without any preheating? Look no further than the FOGATTI Tankless Water Heater! This amazing product features a heat exchanger that quickly heats the water to a maximum of 140°F, making it ready for use without any waiting. With a capacity to run at approximately 5.1 GPM for 40 minutes, it can produce almost 200 gallons of hot water, making it perfect for a multi-point water supply for the entire house.

One of the best features of this tankless water heater is its precise temperature control and stable temperature, which is achieved through the use of a wire controller cord length of 164ft. This allows you to control the water temperature indoors and the burner can be burnt in sections to meet the water temperature demand in the four seasons. Thanks to the calculation and control of the heating power 1000/s by the chip, the temperature difference of the water can be precisely controlled within ±2°F.

Another great feature of the FOGATTI Tankless Water Heater is its compact design for easy installation. Unlike traditional water heaters that take up a lot of space, this tankless water heater is just 1/4 the size of a 50-gallon tank water heater, making it easy to install. Additionally, the highly integrated components provide greater safety from water pressure surges without the need to install an expansion tank.

If you're worried about the space it takes up, you'll be pleased to know that the FOGATTI Tankless Water Heater is designed for outdoor installation, which means it won't occupy any living space. What's more, the bottom built-in forced DC fan eliminates the influence of external wind, ensuring the stability of combustion and achieving safety, energy saving, and no pollution. It's important to note that all installations should be carried out in accordance with local building and plumbing codes by licensed professionals.

Finally, FOGATTI Tankless Water Heater is CSA certified in the USA and Canada, ensuring superior safety and durability using the world's most advanced technology. FOGATTI is so confident in their product's quality and performance that they provide a 5-year warranty on the heat exchanger and 2-year warranty on other parts. With all these features, the FOGATTI Tankless Water Heater is a top-of-the-line product that can provide you with endless hot water supply for your home.

3. Rinnai's Outdoor Tankless Water Heater – High Output!

The tankless hot water heater from Rinnai is a smart design that conserves energy by only heating water when necessary. It features an improved internal layout which speeds up installation and enhances serviceability. The LED screen provides service reminders and error codes for easy maintenance.

With this compact tankless gas water heater, you'll never run out of hot water. Despite its small size, it provides up to 7.6 gallons per minute, which is enough to supply six fixtures at once. This non-condensing outdoor unit is perfect for households that require a reliable and efficient source of hot water.

The water heater is designed to last and comes with a 15-year residential guarantee for the heat exchanger, a 5-year guarantee for labor, and a 1-year guarantee for parts. The Controlr module provides WiFi control, but it isn't included, while the REP199eN model includes a pump.

It's recommended that you have a professional technician install your Rinnai tankless water heater. Visit the Find a Rinnai PRO page on their website to locate a qualified technician in your area. They do not recommend installing a water heater without assistance from a technician.

To find the right tankless water heater for your home, check out Rinnai's product guides, manuals, energy guide, warranty information, videos, and tables. You can also use their Ground Water Temperature Map to determine if this heater is optimal for your region.

4. Gas Hot Water Heater For Outdoor Adventures

Introducing the Premium Tankless Water Heater with CSA Approved Regulator, a reliable and safe option for those in need of hot water on-the-go. Engineered with advanced combustion technology, this water heater is efficient and energy-saving, making it an ideal choice for those looking for a cost-effective solution for their hot water needs.

Safety is a top priority with this water heater, as it comes equipped with a flame failure device, anti-freezing protection, and over-heating protection features. It only requires 3.6PSI of water pressure and can output up to 4.21 gallons of hot water per minute, with a maximum temperature raise of 167°F. Please note that this heater is only applicable for use with propane (LPG).

The Tankless Water Heater is also designed for portability, with a compact and lightweight structure that makes it easy to carry wherever you go. Whether you need a hot shower after a long day of camping, in your RV, or for giving your pet a bath, this water heater is perfect for all of your needs. It measures at 21.65×5.9×13.4 inches and is powered by 2 size "D" cell batteries.

This tankless water heater comes with complete accessories, including a CSA approval 5FT Gas Regulator, 5 Spray Modes high-pressure Shower Head with a 59in (1.5m) extended Long Stainless Steel Hose and Shower Holder. The propane water heater has three interface ports, with the left one being the air inlet, the middle one being the shower port, and the right one being the water inlet.

The Tankless Water Heater is versatile and can be used for a wide range of activities, including outdoor showers for camping, hiking, fishing, and beaching. It can also be used as a portable hot water sink or for RV/SUV/MPV use. Additionally, this water heater is perfect for washing your pets. Always remember to check for gas leakage before operating it.

5. Rinnai Rl75en Tankless Hot Water Heater, 7.5 Gpm, Natural Gas, Outdoor Installation

Introducing the Rinnai Tankless Hot Water Heater, featuring the latest in non-condensing technology and Circ-Logic recirculation patterns that match your habits. This compact gas water heater is only the size of a small suitcase but packs a powerful punch, providing up to 7.5 gallons per minute and supporting up to 5 fixtures at once.

Designed with both durability and convenience in mind, the Rinnai Tankless Hot Water Heater comes with a 12-year residential guarantee for the heat exchanger, a 5-year guarantee for labor, and a 1-year guarantee for parts. Commercial buyers can also enjoy a 5-year guarantee for the heat exchanger, a 5-year guarantee for labor, and a 1-year guarantee for parts.

For added convenience, consider purchasing the Controlr module for WiFi control (not included). This allows you to easily manage your hot water heater from anywhere within your home.

To ensure proper installation and avoid any potential issues, Rinnai recommends professional installation. Visit the Find a Rinnai PRO page on the company's website to locate a qualified technician in your area.

Choosing the right Rinnai tankless water heater for your home is easy with the company's product guides, manuals, energy guide, warranty information, videos, and tables. Check out the Ground Water Temperature Map to see if this heater is optimal for your region.

Never run out of hot water again with the Rinnai Tankless Hot Water Heater. Enjoy the latest technology, professional installation, and peace of mind with industry-leading guarantees.

6. Gashot Portable Tankless Water Heater – Ultimate Outdoor Companion

Introducing the Premium Tankless Water Heater, the perfect solution for anyone in need of a safe and efficient hot water system. This CSA approved water heater features enhanced safety measures such as a flame failure device, anti-freezing protection, and over heating protection. With just 3.6PSI of water pressure, this water heater can output an impressive 4.74 gallons of hot water per minute, with a maximum temperature raise of up to 167°F. Please note that this water heater is applicable only for propane (LPG).

The Propane Water Heater's advanced combustion technology ensures efficient gas consumption and minimal burning noise, resulting in a maximum power output of 68000btu/hour. With 11.5% energy saving technology, you'll get more hot water for less money. This water heater is compact and lightweight, making it easy to carry and perfect for use on camping trips, in RVs, or even for giving your pet a bath. It measures 24.23 x 5.9 x 13.4 inches and is powered by 2 size "D" cell batteries.

This tankless water heater comes with a complete set of accessories, including a CSA approved 5FT Gas Regulator, a high-pressure shower head with 5 spray modes and a 59in (1.5m) extended long stainless steel hose, as well as a shower holder. The water heater features three interface ports, with the left one being the air inlet, the middle one being the shower port, and the right one being the water inlet.

The Premium Tankless Water Heater is perfect for a wide range of uses, including outdoor showers when camping, hiking, fishing, or at the beach. It also serves as a portable hot water sink and is suitable for use in RVs, SUVs, and MPVs. Additionally, this water heater can be used to wash your pets. Always check for gas leakage before operation to ensure optimal safety.

7. Rinnai Ru199en Condensing Tankless Hot Water Heater, 11 Gpm, Natural Gas, Outdoor Installation

Looking for an endless supply of hot water for your home? Look no further than this compact and durable hot water heater. With its space-saving design, this heater is energy-efficient, heating only when necessary to conserve energy and save you money on your utility bills.

But that's not all – this hot water heater also provides optimal water pressure, with up to 11 gallons per minute of hot water flow rate for a powerful and constant stream. And with instant heating technology, you won't have to wait for your hot water to heat up – simply pair it with an external pump and enjoy scheduled or on-demand hot water recirculation.

Not only is this hot water heater efficient and powerful, but it's also built to last. With a 15-year residential warranty for the heat exchanger, a 5-year warranty for labor, and a 1-year warranty for parts, you can trust that this heater will provide reliable hot water for years to come.

And for added convenience, this hot water heater even comes equipped with Wifi monitoring, allowing you to keep an eye on your hot water usage and temperature from anywhere in your home. So why wait? Invest in this top-of-the-line hot water heater and start enjoying endless hot water today!

8. Propane Camp Water Heater: Instant Hot Outdoor Shower

Introducing the Premium Tankless Water Heater with CSA Approved Regulator, a safe and efficient solution for hot water needs. This product boasts advanced safety features such as flame failure device, anti-freezing protection, and over heating protection. It requires just 3.6PSI of water pressure to output 5.26 gallons of hot water per minute, with a maximum temperature raise of 167 °F. Please note that this product is only applicable for use with Propane (LPG).

Thanks to its advanced combustion technology, the Propane Water Heater is energy-saving, consuming less gas while operating at a maximum power output of 68,000btu/hour. With its compact and lightweight structure, this water heater is designed for easy portability and boasts 11.5% energy-saving technology, meaning you can enjoy more hot water for less money.

The Portable Water Heater is an ideal solution for those who enjoy camping, RV-ing, or simply require a mobile hot water source. Its dimensions of 17.12×7.87×26.77 inches make it easy to carry, while the power source of 2 pcs size "D"cell Batteries ensures it can be used anywhere. Additionally, this tankless water heater comes complete with a CSA approval 5FT Gas Regulator, a 5 Spray Modes high-pressure Shower Head with 59in(1.5m) extended Long Stainless Steel Hose and Shower Holder. Three interface ports are located under the propane water heater, with the left one serving as the Air inlet, the middle one as the shower port, and the right one as the water inlet.

This versatile Camping Heater is perfect for outdoor showers, offering a delightful hot shower experience while camping, hiking, fishing, beaching, or even as a portable hot water sink for your RV/SUV/MPV. Additionally, you can even use this Tankless Water Heater to wash your pets, making it a versatile and convenient product for many different uses. As always, it is important to check for gas leakage before operating the product.

9. Rinnai Ru180en Condensing Tankless Hot Water Heater, 10 Gpm, Natural Gas, Outdoor Installation

Looking for an endless supply of hot water for your home? Look no further than this compact and durable water heater. With the ability to provide unlimited hot water flow throughout the entire house, this heater is perfect for families of any size. And with its space-saving design, it's also energy efficient, heating only when necessary to conserve energy and save you money.

One of the standout features of this water heater is its optimal water pressure. With a hot water flow rate of up to 10 gallons per minute, you can enjoy a powerful and constant stream of hot water, even during peak usage times. And with its Circ-Logic technology, you can pair the heater with an external pump to reduce wait time for hot water via scheduled or on-demand recirculation.

But this water heater isn't just powerful and efficient – it's also built to last. With a 15-year warranty for the heat exchanger and a 5-year warranty for labor, you can trust that this heater will provide reliable and consistent hot water for years to come. And with its Wifi monitoring feature, you can easily keep track of your water usage and adjust settings as needed.

While professional installation is recommended for this water heater, its easy-to-install design makes the process quick and hassle-free. So why wait? Upgrade your home's hot water system today with this top-of-the-line water heater.

10. Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 6.8 Gpm – Rtgh-68xln-2

Introducing a water heater that not only provides you with hot water but also helps you save water and energy. With the exclusive Water Savings technology, this water heater can conserve up to 1,100 gallons of water per year, reducing your water bills and making it environmentally friendly.

This water heater is equipped with a powerful 120,000 BTU burner, ensuring that you get hot water instantly and efficiently. The exclusive Hot Start Programming is designed to minimize cold water bursts by keeping the heater in a ready-to-fire state, saving you time and frustration.

Additionally, this water heater is Recirculation pump ready, allowing you to easily install a recirculation pump kit for even more energy savings. Designed for outdoor use, this water heater comes with freeze protection up to -30 degrees, making it suitable for all weather conditions.

Investing in this water heater means investing in a reliable, efficient, and eco-friendly appliance that will provide you with hot water whenever you need it. The parameters and specifications of this water heater make it a top-of-the-line product that is sure to meet all your hot water needs.

Best Outdoor Tankless Gas Water Heater FAQs

Are there any safety concerns with using an outdoor tankless gas water heater?

Yes, there are some safety concerns associated with using an outdoor tankless gas water heater. One of the main concerns is the risk of carbon monoxide poisoning. Carbon monoxide is a colorless, odorless gas that can be produced when natural gas or propane is burned. If the outdoor tankless gas water heater is not properly ventilated, carbon monoxide can build up and cause serious health problems or even death.

To prevent carbon monoxide poisoning, it is important to ensure that the outdoor tankless gas water heater is installed by a licensed professional. The installation should include proper ventilation and a carbon monoxide detector should be installed nearby. It is also important to have the outdoor tankless gas water heater inspected regularly to ensure that it is functioning properly.

In addition to carbon monoxide poisoning, there is also a risk of fire associated with outdoor tankless gas water heaters. To minimize this risk, the outdoor tankless gas water heater should be installed away from flammable materials and should be equipped with a flame failure device that will shut off the gas supply if the flame goes out.

Overall, while there are some safety concerns associated with using an outdoor tankless gas water heater, these risks can be minimized with proper installation, ventilation, and regular maintenance.

How efficient are outdoor tankless gas water heaters compared to traditional water heaters?

Outdoor tankless gas water heaters are more efficient than traditional water heaters in terms of energy consumption and cost-effectiveness. This is because tankless gas water heaters only heat water on demand, whereas traditional water heaters have to continually heat and maintain a large tank of water, even when not in use. This means that tankless gas water heaters use less energy and can save homeowners money on their utility bills.

Additionally, outdoor tankless gas water heaters have a longer lifespan than traditional water heaters. They can last up to 20 years or more, while traditional water heaters typically last around 10-15 years. This means that homeowners will save money in the long run by not having to replace their water heater as frequently.

Overall, outdoor tankless gas water heaters are a more efficient and cost-effective option for heating water in homes. They provide hot water on demand, use less energy, and have a longer lifespan than traditional water heaters.

How long do outdoor tankless gas water heaters typically last?

Outdoor tankless gas water heaters can last up to 20 years or more with proper maintenance and care. However, the lifespan of a tankless gas water heater can vary depending on factors such as usage, water quality, installation, and maintenance. If the water heater is used frequently and not properly maintained, it may not last as long as one that is used less often and well-maintained. Additionally, hard water can cause mineral buildup in the system, which can lead to decreased efficiency and a shorter lifespan. It is important to have the water heater regularly serviced by a professional to ensure that it is running efficiently and to catch any potential issues before they become major problems. Overall, with proper care and maintenance, a tankless gas water heater can be a reliable and long-lasting investment for your home.

What are the benefits of using an outdoor tankless gas water heater?

An outdoor tankless gas water heater offers numerous benefits over traditional tank-style water heaters. Firstly, it is more energy-efficient as it heats water on demand, eliminating standby heat loss that occurs in tanks. This means that you only use energy to heat water when you need it, saving you money on your energy bills. Additionally, tankless gas water heaters have a longer lifespan than tank-style heaters, with an average lifespan of 20 years compared to the 10-15 years of tanks.

Another benefit of using an outdoor tankless gas water heater is that it saves space. Since it does not have a large tank, it can be installed outside, freeing up valuable indoor space. Furthermore, tankless gas water heaters provide an endless supply of hot water, making it ideal for large families or households with high hot water demand.

Lastly, outdoor tankless gas water heaters are environmentally friendly as they emit fewer greenhouse gases compared to traditional water heaters. This makes them a great option for individuals looking to reduce their carbon footprint.

What are the installation requirements for an outdoor tankless gas water heater?

Installing an outdoor tankless gas water heater requires more than just a suitable location. It is important to follow all the necessary installation requirements to ensure proper functionality and safety.

Firstly, the unit must be installed outdoors, with adequate ventilation and protection from the elements. The unit must also be installed on a sturdy, level surface that can support the weight of the unit and the necessary piping.

The gas supply line must be correctly sized and have the appropriate gas type and pressure for the unit. It is essential to have a licensed professional install the gas line and ensure that all connections are tight and secure.

Additionally, the unit must be connected to an appropriate water source and have a properly installed drain line. It is also essential to install a water softener to prevent mineral build-up in the unit and prolong its lifespan.

It is crucial to follow all the manufacturer's instructions and local codes and regulations when installing an outdoor tankless gas water heater. It is recommended to have a licensed professional perform the installation to ensure the unit's safety and functionality.

What are the top-rated outdoor tankless gas water heaters?

There are several top-rated outdoor tankless gas water heaters available in the market. One of the top picks is the Rinnai V Series HE Outdoor Tankless Hot Water Heater, which is highly efficient and comes with a compact design. With a flow rate of up to 9.8 gallons per minute, it can provide hot water to multiple appliances simultaneously. Another highly-rated option is the Rheem Performance Platinum Outdoor Tankless Gas Water Heater, which has a sleek design and is equipped with advanced features such as built-in Wi-Fi and leak detection. It also has a high flow rate of up to 9.5 gallons per minute and can provide endless hot water on demand. The Takagi T-K4-OS-NG Tankless Water Heater is another popular option, known for its durability and energy efficiency. It has a maximum flow rate of 8.0 gallons per minute and can provide hot water to multiple fixtures at the same time. Ultimately, the best outdoor tankless gas water heater for you will depend on your specific needs and budget.

What brand of outdoor tankless gas water heater is the most reliable?

When it comes to outdoor tankless gas water heaters, there are several brands known for their reliability. One of the most popular and trusted brands is Rinnai. Rinnai offers a range of outdoor tankless gas water heaters that are known for their efficiency, durability, and performance. Another brand that is highly recommended for outdoor tankless gas water heaters is Rheem. Rheem is known for its innovative technology and high-quality products. Additionally, Navien is another brand that has gained a reputation for its reliable outdoor tankless gas water heaters. It's always important to consider the specific needs of your household when choosing a brand and model, as well as the product's warranty, customer service, and overall reviews from other homeowners.

What features should I look for when choosing the best outdoor tankless gas water heater for my needs?

When choosing an outdoor tankless gas water heater, there are several features you should consider to ensure that you select the best one that meets your needs.

Firstly, you should consider the size and flow rate of the unit. It's important to choose a unit that can provide enough hot water for your household's needs. If you have a larger family or use hot water for multiple tasks simultaneously, a higher flow rate will be necessary.

Secondly, you should look for a unit with a high energy efficiency rating. Look for models that are certified by ENERGY STAR as these are designed to use less energy and save you money on your energy bills.

Thirdly, check the material of the heater. Look for a model made of high-quality materials that can withstand weather elements.

Fourthly, consider the installation process and ensure that it is within your budget.

Lastly, look for models that come with a warranty, as this can provide you with peace of mind that you are investing in a quality product.

Overall, by considering these features, you will be able to choose the best outdoor tankless gas water heater that meets your needs and provides you with reliable access to hot water.

What is the price range for a high-quality outdoor tankless gas water heater?

The price range for a high-quality outdoor tankless gas water heater can vary depending on several factors such as the brand, size, and features. Typically, you can expect to pay anywhere from $500 to $1500 for a high-quality outdoor tankless gas water heater. However, it's important to note that investing in a high-quality unit can save you money in the long run by being more energy-efficient and durable. Additionally, it's important to factor in the cost of installation, as this can add to the overall cost of the unit. It's recommended to consult with a professional plumber or HVAC technician to determine the best unit for your specific needs and budget.

What size outdoor tankless gas water heater do I need for my home?

The size of the outdoor tankless gas water heater you need for your home depends on several factors such as the number of bathrooms, the number of people in your household, and your hot water usage habits. A general rule of thumb is that a tankless gas water heater should be able to supply 2-3 gallons of hot water per minute per fixture.

For example, if you have 2 bathrooms with a shower, sink, and toilet, you will need a tankless gas water heater that can produce at least 6 gallons of hot water per minute (2 x 3). If you have a larger household or more fixtures that require hot water, you may need a larger tankless gas water heater.

It is recommended to consult with a professional plumber or HVAC technician to determine the appropriate size for your specific needs. They can also help you choose the most efficient and cost-effective option for your home.

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