Best Gas Tankless Water Heaters (2024 Update)
If you're looking for a more energy-efficient and cost-effective way to provide hot water to your home, a gas tankless water heater may be the solution for you. Unlike traditional tank water heaters, gas tankless water heaters heat water on-demand, providing a continuous supply of hot water and saving energy by not constantly heating a large volume of water in a tank.
Before buying a gas tankless water heater, there are several factors to consider. First, determine the size of heater you need based on your household's hot water usage. You'll also need to consider the type of gas your home uses and ensure that the heater you choose is compatible. Additionally, it's important to consider the unit's energy efficiency rating, warranty coverage, and installation requirements.
When it comes to choosing the best gas tankless water heater, there are several questions you should ask yourself. How important is the unit's energy efficiency rating to you? Are you willing to pay more upfront for a higher-quality unit that may save you money on energy bills in the long run? How important is the warranty coverage for you? Are you comfortable with the installation requirements, or would you prefer to hire a professional?
By considering these factors and answering these questions, you can find the best gas tankless water heater for your home's needs and enjoy a continuous supply of hot water while saving energy and money.
10 Best Gas Tankless Water Heaters
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Ideal for providing hot water quickly and efficiently while minimizing energy costs, using natural gas as fuel.
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This product is ideal for providing instant hot water to an entire house using natural gas.
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Ideal for outdoor use such as camping, RVs, cabins, barns, and boats to provide instant hot water.
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The product is ideal for providing hot water outdoors using propane at a rate of 5.3 gallons per minute.
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This product is ideal for providing hot water on demand using liquid propane gas.
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The product is ideal for providing outdoor hot water heating with a natural gas source and a flow rate of 5.3 GPM.
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The product is ideal for providing hot water on demand indoors using liquid propane and has mid-level energy efficiency.
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Ideal for providing on-demand hot water for indoor use, using natural gas as the power source.
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The product is ideal for providing hot water efficiently and continuously in indoor spaces using natural gas.
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It is an outdoor natural gas water heater with high flow rate, suitable for residential or light commercial applications.
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1. Rheem Rtgh-84dvln-2 Natural Gas Condensing Tankless Water Heater, Silver , Gray
Looking for a water heater that can provide hot water without any delay? Look no further than this energy-efficient and cost-effective water heater. It is designed to deliver hot water instantly, without any wastage of water or energy.
This water heater is not only energy-efficient, but it also saves water. It has a high energy efficiency and water savings setting that ensures minimum energy consumption and maximum water savings, thereby reducing your water and energy bills.
The water heater has a compact and space-saving design, making it perfect for replacing an old tank. You won't have to worry about it taking up too much space in your home.
One of the most impressive features of this water heater is the water and gas leak detection system. If the unit detects any water or gas leaks, it automatically shuts down and provides an error code, ensuring the safety of your home and family.
2. Camplux Blackgas Tankless Water Heater
The Camplux CA318 gas hot water heater is an innovative and efficient solution for your hot water needs. With its steady temperature control, the water temperature can be precisely controlled within ±2 ℉, ensuring no more chilly cold showers.
What sets the Camplux CA318 gas hot water heater apart is its high heating performance. Equipped with an oxygen-free copper heat exchanger and a v-type stainless steel burner, this tankless water heater can achieve a high heating efficiency of up to 98.99% in just 3 seconds. It has a 3.18 GPM instant hot water output, which can supply hot water to 2-3 points simultaneously, making it perfect for bathroom and kitchen hot water demand.
The Camplux CA318 gas hot water heater is designed for durability and longevity, using the world's most advanced technology. It comes with a 3-year warranty for the oxygen-free copper exchanger and a 1-year warranty for other parts.
Installation of the Camplux CA318 is a breeze, as it comes with standard 1/2" NPT water fitting and gas inlet, and a 2.3" horizontal vent pipe for quick installation. It is recommended to use the Camplux wall thimble for perfect indoor use. If you intend to use propane tanks, it is necessary to get a gas regulator (Camplux model KR-106A) and a 1 pc 5/8" NPT male to 1/2" BSP female gas connector to hook up the water heater.
The Camplux tankless water heater is trendy and stylish, with a unique black glassy front panel. It is also easy to operate, with an LED touch screen and Fahrenheit digital display to control the water temperature.
This tankless water heater is a space-saving solution, as it is only 1/6 the size of a 50-gallon tank water heater, making it perfect for small spaces like apartments, cabins, and homes. Its integrated components provide greater safety from water pressure surges, eliminating the need to install an expansion tank.
It is important to note that the stand-by electric power is 2W, while the working electric power is 42W. The propane gas input pressure is 0.4psi, and there is a pressure relief valve at the water inlet of the water heater. It is necessary to manually unscrew the pressure relief valve to drain the water inside the machine in time after using the machine to avoid freezing and blowing up when the temperature is lower than 32 ℉ in winter.
3. Portable Propane Water Heater For Outdoor Adventures
Introducing the [1.58 GPM/6L Propane Water Heater], a versatile and reliable hot water solution for any off-grid situation. With a powerful output of 41000 BTU/hour, this water heater can produce up to 1.58 gallons per minute of hot water at a maximum temperature of 109.4°F (43°C) and a minimum temperature of 55.4°F (13°C) at a flow rate of 1.58 GPM. Even with low water pressure, this heater can start up with just 3.6 PSI of water pressure.
This heater is perfect for off-grid living, camping, RVs, hunting, poolside use, pet and horse washing, vehicle cleaning, and even for use in tiny houses, greenhouses, or cabins. It uses a standard 20-pound liquid propane tank and features an electronic ignition that is fueled by two D-cell batteries.
Safety is of utmost importance, and this water heater is CSA certified, meeting both Canadian and American safety standards. It contains protections against overheating, low water flow, dry combustion, freezing, high water pressure, and flame failure.
The LED display of this water heater illuminates the temperature, ensuring that the water is just the right temperature for your needs. To prevent gas leaks caused by improper water heater sealing, it is important not to wrap Teflon tape around the gas regulator and gas inlet pipe. Always inspect for gas leaks prior to operation.
The package includes the GASLAND BE158B tankless water heater, CSA-certified gas regulator and hose, shower head, hardware, adapter, and instruction manual. This product is splash-proof and can withstand light drizzle, but it is important to avoid prolonged exposure to rain or water and to store it in a dry environment. In winter, be sure to remove the drain plug and store it in a warm, dry location.
4. Rinnai V53dep Tankless Hot Water Heater, 5.3 Gpm, Propane, Outdoor Installation
The Endless Hot Water unit offers a seamless supply of hot water throughout the house, making it the perfect addition to any home. Designed with durability in mind, this compact unit is also easy to install, although professional installation is recommended.
One of the key benefits of the Endless Hot Water unit is its energy and space efficiency. The space-saving design ensures that energy is conserved as the unit only heats water when necessary, which helps to reduce energy costs.
With a hot water flow rate of up to 5.3 gallons per minute (GPM), this unit offers optimal water pressure for a powerful, constant stream. This makes it ideal for use in larger households or for homes with multiple bathrooms.
The Endless Hot Water unit also features enhanced scale detection, which lessens the possibility of serious, long-term damage to the unit. This feature ensures that the unit will continue to function smoothly for years to come.
To further provide peace of mind, the Endless Hot Water unit comes with a comprehensive warranty. The heat exchanger is covered by a 10-year residential factory warranty, while the labor and parts are covered for 5 and 1 year respectively. This ensures that customers can enjoy the benefits of their Endless Hot Water unit for years to come, without having to worry about unexpected repair costs.
5. Eccotemp Fvi12-Lp Liquid Propane Gas Tankless Water Heaters, White
The gas-powered tankless water heater is a perfect solution for small homes, apartments, and cabins. It boasts a 3.6 GPM rating, activating only when in use, which helps conserve energy and reduce utility bills.
This water heater is designed for indoor installation and comes with a safe and efficient power ventilation system. The easy-to-read digital temperature display allows for convenient temperature adjustment. Additionally, the compact and space-saving design of the unit ensures minimal noise output.
Safety is a top priority with this water heater, which features an electronic ignition system. It plugs into a standard 120v electrical outlet with a UL-listed cord. The unit uses standard 1/2" NPT water fittings and is equipped with easy-to-use manual water temperature controls.
This tankless water heater has a minimum 0.65 GPM flow rate and provides a continuous supply of hot water, making it an excellent choice for households of various sizes. With its energy-efficient features and reliable performance, this tankless water heater is an excellent investment for any homeowner.
6. Rinnai V53den Tankless Hot Water Heater, 5.3 Gpm, Natural Gas, Outdoor Installation
Looking for a reliable and efficient water heating solution for your home? Look no further than this endless hot water system. With the ability to provide unlimited hot water flow throughout your house, you'll never have to worry about running out of hot water again.
This system features a compact and durable design that is easy to install, though professional installation is recommended for optimal performance. Its space-saving design conserves energy by only heating water when necessary, making it an energy-efficient choice for your home.
With a high-performance rate of up to 5.3 gallons per minute, this system provides a powerful and constant stream of hot water for all your household needs. Plus, its enhanced scale detection helps to lessen the possibility of serious, long-term damage to the unit.
Rest assured that this system is built to last, with a 10-year factory warranty for the heat exchanger, a 5-year warranty for labor, and a 1-year warranty for parts. So why wait? Invest in this endless hot water system today and enjoy the convenience and comfort of unlimited hot water in your home.
7. Rheem Mid-Efficiency 7.0gpm Indoor Liquid Propane Tankless Water Heater
Experience uninterrupted hot water supply with this highly efficient tankless gas water heater. With its continuous hot water production, you no longer have to worry about running out of hot water, even if you have back-to-back showers.
This water heater is designed to reduce energy consumption by automatically adjusting the amount of energy required to heat the water you need. Not only does it save you money on your energy bill, but it also helps reduce your carbon footprint.
Controlling the temperature of your water has never been easier with the user-friendly control feature. You can easily adjust the water temperature to your desired range, which spans from 85˚F–140˚F.
Investing in this tankless gas water heater is a cost-effective and energy-efficient solution to your hot water needs. With its advanced features and reliable performance, you can enjoy hot water whenever you need it without having to worry about skyrocketing energy bills.
8. Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater 6.8 Gpm – Rtgh-68vln-2
Looking for an efficient and space-saving solution to your hot water needs? Look no further than this compact, indoor-use water heater. With its low operating cost and high energy efficiency, you'll enjoy hot water without the wait – or the waste.
Designed with the environment in mind, this unit saves both water and gas, making it a smart choice for eco-conscious consumers. In fact, its energy savings setting ensures that you'll enjoy all the hot water you need without any unnecessary waste.
But that's not all – this versatile water heater is also designed to save space, making it perfect for tank replacements or any situation where space is at a premium. And with its innovative water and gas leak detection system, you can rest assured that your unit will shut down automatically and provide an error code in the unlikely event of a leak.
So if you're looking for a reliable, efficient, and space-saving solution to your hot water needs, this indoor-use water heater is the perfect choice.
9. Rheem Prestige High Efficiency 9.5gpm Indoor Natural Gas Tankless Water Heater
Introducing the perfect solution for those who want instant hot water without the wait and the waste – the compact and efficient hot water tankless system. This innovative product is designed to provide you with high efficiency and water savings settings, making it the ideal choice for anyone looking to save on their energy bills.
One of the key benefits of this tankless system is its low operating cost. Thanks to its high energy efficiency, you can enjoy hot water without worrying about skyrocketing utility bills. Moreover, its water and gas leak detection feature ensures safety and minimizes the risk of accidents. In the event of a leak, the system will shut down automatically and provide an error code for easy diagnosis.
The compact design of this unit makes it a perfect space-saving solution for those who want to replace their bulky and outdated water tanks. It can be easily installed in small spaces, making it ideal for apartments, condos, and small homes. With its sleek and modern design, it will blend perfectly with any decor.
It's important to note that this tankless system is designed for indoor use only. It is specifically designed to cater to your hot water needs, providing you with instant hot water whenever you need it. Whether it's for your kitchen sink or your shower, this tankless system has got you covered.
10. Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 Gpm – Rtgh-95xln-2
Looking for a water heater that can provide hot water instantly without any waiting period? Look no further than this efficient and eco-friendly water heater that can deliver hot water instantly without any waste.
With its low operating cost and high energy efficiency, this water heater is designed to offer significant water savings while also reducing your energy bills. Its space-saving compact design makes it a great choice for those looking to replace their traditional tank-based water heaters.
One of the best features of this water heater is its Water & Gas Leak Detection system that can detect any leaks and shut down the unit immediately, providing an error code to help with troubleshooting. This feature ensures that you get safe and reliable performance from your water heater every time you use it.
In addition, this water heater is designed to be used outdoors and comes with freeze protection up to -30 degrees, making it ideal for use in colder climates. With its advanced features and reliable performance, this water heater is a must-have for anyone looking to upgrade their water heating system.
Whether you're looking to save on energy bills or simply want hot water on demand, this water heater offers the perfect combination of efficiency, reliability, and convenience. So why wait? Try it out today and experience the benefits of instant hot water without any wait or waste.
Best Gas Tankless Water Heaters FAQs
Are there any tax incentives or rebates available for purchasing a gas tankless water heater?
Yes, there are tax incentives and rebates available for purchasing a gas tankless water heater. In the United States, homeowners may be eligible for a federal tax credit of up to $300 for purchasing a gas tankless water heater that meets certain energy efficiency standards. Additionally, some state and local governments offer rebates or other incentives for installing energy-efficient appliances like gas tankless water heaters. It is important to check with your local utility company or government agency to see what incentives may be available in your area. When purchasing a gas tankless water heater, look for models that meet the ENERGY STAR® certification to ensure that it meets the energy efficiency requirements for the tax credit. Installing a gas tankless water heater can also help homeowners save money on their energy bills in the long run, as these units are more energy-efficient than traditional tank-style water heaters.
Can a gas tankless water heater be used for both residential and commercial purposes?
Yes, gas tankless water heaters can be used for both residential and commercial purposes. In fact, they are becoming increasingly popular in commercial applications due to their energy efficiency and cost savings. Gas tankless water heaters provide hot water on demand, which means they only heat water when it is needed, rather than storing hot water in a tank. This results in lower energy consumption and lower operating costs.
In a residential setting, a gas tankless water heater can provide hot water for multiple fixtures, such as showers, faucets, and appliances. In a commercial setting, they can be used for a variety of applications, including restaurants, hotels, and office buildings. They can provide hot water for multiple sinks, showers, and appliances simultaneously, which makes them ideal for high-demand applications.
However, it's important to note that the size and capacity of the gas tankless water heater should be determined based on the specific needs of the building or facility. A professional installer can help determine the appropriate size and capacity for your specific application.
How do gas tankless water heaters compare to traditional tank water heaters in terms of energy efficiency?
Gas tankless water heaters are more energy-efficient compared to traditional tank water heaters. This is because tankless water heaters heat water on demand, meaning they do not store hot water in a tank. Traditional tank water heaters, on the other hand, store hot water in a tank, which requires energy to keep the water heated even when it is not being used.
Tankless water heaters use less energy because they only heat water when it is needed. When a hot water tap is turned on, cold water travels through a heat exchanger and is quickly heated by a gas burner or electric element. This means that there is no standby heat loss, which occurs when heat escapes from the tank of a traditional water heater.
Additionally, tankless water heaters have a longer lifespan than traditional tank water heaters, which can last around 10-15 years. Tankless water heaters can last up to 20 years or more, which means they save homeowners money in the long run. Overall, gas tankless water heaters are a more energy-efficient and cost-effective option for homeowners looking to replace their traditional tank water heater.
How long does a gas tankless water heater typically last?
A gas tankless water heater is designed to last longer than a traditional tank-style water heater. The average lifespan of a gas tankless water heater is around 20 years, depending on the quality of the unit and how well it is maintained. However, with proper maintenance and regular inspections, some units can last up to 25 years or more.
The longevity of a gas tankless water heater largely depends on the quality of the components and the level of usage. Units that are used heavily and not properly maintained are likely to have a shorter lifespan. Additionally, hard water can cause mineral buildup inside the unit, which can affect its performance and lifespan.
To extend the life of your gas tankless water heater, it is important to have it professionally installed and regularly maintained. This includes flushing the unit annually to remove mineral buildup, replacing any worn-out components, and ensuring proper ventilation and gas pressure. By taking these steps, you can help ensure that your gas tankless water heater lasts as long as possible.
How much does it cost to install a gas tankless water heater?
The cost of installing a gas tankless water heater can vary depending on several factors. The size of the unit, the complexity of the installation, and the location of the installation can all impact the overall cost. On average, a gas tankless water heater installation can range from $1,000 to $3,000. However, there are additional expenses to consider, such as permits, venting, and plumbing modifications. It is important to have a professional installer assess your home's needs and provide an accurate estimate. Additionally, it is crucial to invest in a high-quality unit to ensure optimal performance and energy efficiency. While the initial cost may be higher than a traditional water heater, the long-term savings on energy bills can make it a worthwhile investment.
How much hot water can a gas tankless water heater provide?
The amount of hot water that a gas tankless water heater can provide depends on the unit's flow rate and the temperature rise needed. The flow rate is measured in gallons per minute (GPM), and it indicates how much water the heater can heat at a given time. The temperature rise is the difference between the temperature of the incoming water and the desired hot water temperature.
For example, a gas tankless water heater with a flow rate of 5 GPM can provide 5 gallons of hot water per minute. If the temperature of the incoming water is 60°F, and the desired hot water temperature is 120°F, the heater needs to raise the water temperature by 60°F. In this case, the heater can provide 2.5 gallons of hot water per minute, which is half of its maximum flow rate.
It is important to choose the right size of tankless water heater based on the household's hot water needs. A professional plumber can help determine the appropriate size based on factors such as the number of people in the household, the number of bathrooms, and the hot water usage patterns.
What are the maintenance requirements for a gas tankless water heater?
Maintaining a gas tankless water heater is essential to ensure its longevity and optimal performance. The following are the maintenance requirements for a gas tankless water heater:
1. Flushing the system: Mineral deposits can build up in the heat exchanger and other components of the system, leading to reduced efficiency. Flushing the system with a descaling solution at least once every year can prevent this.
2. Checking for leaks: Regularly inspect the water heater's connections, valves, and pipes for leaks. If you notice any leaks, get them repaired immediately to avoid further damage.
3. Cleaning or replacing the air filter: A dirty air filter can affect the water heater's performance. Check the air filter every 6 months and clean or replace it as needed.
4. Inspecting the venting system: The venting system should be inspected for blockages or damage at least once a year to ensure proper airflow.
5. Checking the gas supply: Regularly check the gas supply line and connections for leaks or damage.
By performing these maintenance tasks, you can ensure that your gas tankless water heater operates efficiently and safely, providing you with hot water on demand for many years to come.
What are the top-rated brands for gas tankless water heaters?
When it comes to gas tankless water heaters, there are several brands that have earned a reputation for their quality and reliability. Some of the top-rated brands for gas tankless water heaters include Rinnai, Navien, Noritz, Takagi, and Rheem.
Rinnai is one of the most popular brands, known for its energy-efficient and durable tankless water heaters. Navien is another well-respected brand, offering high-efficiency water heaters with advanced features like Wi-Fi connectivity and dual stainless steel heat exchangers. Noritz is also a trusted brand, offering a range of tankless water heaters with features like self-diagnostic systems and built-in freeze protection.
Takagi is another reliable brand, known for its efficient and durable water heaters that are designed to save energy and reduce emissions. Finally, Rheem is a trusted brand that offers a range of gas tankless water heaters with high energy efficiency ratings and advanced features like digital temperature control.
Overall, these top brands offer reliable, energy-efficient, and durable gas tankless water heaters that can provide a consistent supply of hot water on demand.
What safety features should I look for in a gas tankless water heater?
When choosing a gas tankless water heater, safety features should be one of your top priorities. Here are some safety features that you should look for:
1. Overheat protection: This safety feature will prevent the unit from overheating and potentially causing a fire.
2. Flame failure device: This feature will shut off the gas supply if the flame goes out, preventing gas leaks.
3. Automatic shut-off valve: This safety feature shuts off the water flow if the temperature of the water reaches a certain level, preventing scalding.
4. Freeze protection: This feature will prevent the unit from freezing and potentially causing damage to the system.
5. Venting: Ensure that the unit is properly vented to prevent the build-up of dangerous gases such as carbon monoxide.
6. Pressure relief valve: This safety feature will release pressure if it builds up too high, preventing damage to the unit.
Remember to always have your gas tankless water heater installed by a licensed professional and to perform regular maintenance to ensure that all safety features are functioning properly.
What size gas tankless water heater do I need for my home?
To determine the right size of a gas tankless water heater for your home, you need to consider a few factors. First, determine the maximum flow rate of hot water needed at any given time. This is usually calculated based on the number of people in your household and the number of appliances that use hot water simultaneously.
Next, calculate the temperature rise that your water needs. This is the difference between the temperature of the incoming water and the desired temperature of hot water.
Once you have these figures, you can use an online sizing calculator or consult with a professional plumber to determine the appropriate size of the gas tankless water heater.
Generally, a small home with one or two people can use a 120,000 BTU unit, while a larger home with more occupants and appliances may require a 199,000 BTU unit. However, it's crucial to get professional advice to ensure that you get the right size for your specific needs.
