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9 Best Whole House Tankless Water Heater Gas in 2024 - The Top Reviews

Avantika Richard
  Mar 29, 2024 2:48 PM

Are you tired of worrying about running out of hot water in your home? Then it might be time to take a look at the whole-house tankless water heater gas models on the market today.

Not only do these heaters provide a constant stream of hot water on demand, but they are also more energy efficient than traditional storage tanks and last much longer.

In this blog post, we'll review the best-rated whole-house tankless gas heaters available right now and provide tips on finding the one that's perfect for your needs. Keep reading to learn which model is our top pick!


Our best choices

Best quality: Rinnai RU199iN

The RU199iN Condensing Tankless Hot Water Heater is the perfect choice for meeting your home's hot water needs. With endless hot water flow, you'll never have to worry about running out of warm water again. This heater also features a highly efficient space-saving design which conserves energy and saves you money over time.

Have complete control when it comes to the temperature of your water with optimal water pressure of up to 11 GPM for a powerful, constant stream no matter how many faucets are open or how much hot water you're using.

You can even pair it up with an external pump for instant heating via scheduled or on-demand recirculation so you don't have to wait! And with Wi-Fi monitoring, it's easier than ever to make sure your system is working properly. 

Best design: Rinnai V75iN

The Rinnai V75iN Non-Condensing Natural Gas Tankless Water Heater is designed to conserve energy, only heating when necessary while providing up to 7.5 GPM across 5 fixtures at once.

With its ultra-compact size, this versatile tankless gas water heater fits in a variety of spaces while still delivering never-ending hot water.

It also features an enhanced scale detection device which helps protect against long-term damage to the unit and includes 15-, 5-, and 1-year residential guarantees for the heat exchanger, labor, and parts respectively, so you can trust it will stand the test of time even with heavy use.

Best easy to install: MAREY GA24CSALP

The MAREY GA24CSALP 8.34GPM, High Efficienty, CSA Certified, Residential Multiple Points of Use Liquid Propane Gas Tankless Water Heater is UL listed and DOE-certified to provide energy savings and lasting comfort in your home.

It comes with a CSA certification and offers advanced safety features such as a computerized LED touchscreen and a flow activation switch for convenience and ease of use.

What’s more, this model includes an oxygen-free copper heat exchanger that works hard to provide long-lasting hot water, while its anti-freeze protection feature allows the unit to operate efficiently in cold climates, greatly minimizing the risk of freezing all while keeping your water safe from microbial contamination.

Plus, its stainless steel venting exhaust guarantees safe operation while eliminating maintenance costs even under extreme weather conditions. 

Best safe to use: ‎‎CAMPLUX ENJOY OUTDOOR LIFE CA318-NG

The CAMPLUX Tankless Water Heater Natural Gas – it’s the one product that can make an incredible difference in your day-to-day comfort.

This full-house gas water heater has a 3.18 GPM constant rate, providing unlimited hot water on demand to 2-3 people, guaranteeing a warm and refreshing shower anytime you need it.

But convenience doesn’t mean sacrificing quality – this legal certified model is designed for indoor use, perfect for homeowners looking for peace of mind and reliability in their hot water appliances. 

Best price: ‎CAMPLUX CA528N-NG

The Camplux Tankless Water Heater is more than capable of supplying hot water for the entire family. The on-demand water heater offers high performance up to 5.28 GPM, ensuring a constant stream of hot water that’s perfect for long showers.

Plus, with a thermal efficiency of up to 89.98%, you can rest assured that you’ll be getting your money’s worth with this heater! Installation is simple too – just add the included Camplux customized vent pipe CP-70 for better ventilation performance and you’ll be good to go. 

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Showing  1 - 9  in  9 results
1
  • SCORE
    9.0
    AR Score

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  • Brand
    Rinnai
2
  • SCORE
    9.0
    AR Score

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  • Brand
    Rinnai
3
  • SCORE
    9.0
    AR Score

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  • Brand
    MAREY
4
  • SCORE
    8.8
    AR Score

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  • Brand
    CAMPLUX ENJOY OUTDOOR LIFE
5
  • SCORE
    8.8
    AR Score

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  • Brand
    Rinnai
6
  • SCORE
    8.2
    AR Score

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  • Brand
    CAMPLUX ENJOY OUTDOOR LIFE
7
  • SCORE
    8.2
    AR Score

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  • Brand
    Rheem
8
  • SCORE
    8.2
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  • Brand
    CAMPLUX
9
  • SCORE
    8.0
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  • Brand
    AQUAH

Last update on 2024-03-29 / Affiliate links / Images, Product Titles, and Product Highlights from Amazon Product Advertising API

4.8
5 ratings

Things to consider

Things to consider before purchasing the whole house tankless water heater gas

1. Sizing:

Determine the flow rate and temperature rise you need. Tankless water heaters are rated by the maximum flow rate they can handle (measured in gallons per minute, or GPM) as well as the temperature rise they can provide (measured in degrees Fahrenheit). The higher the rating of both, the more powerful and expensive the heater will be.

2. Efficiency:

Look for a high Energy Factor rating. The Energy Factor (EF) measures how efficiently the heater converts fuel into hot water; the higher the EF, the more efficient the heater is and the lower your energy bills will be in the long run.

3. Features:

Look for useful features such as recirculation systems and remote control. Some tankless water heaters come with a built-in recirculation system that can reduce the amount of time it takes for hot water to reach your tap. Other features, such as remote controls and temperature settings, can make using the heater more convenient.

4. Installation:

Make sure you can install the heater yourself, or that you have access to professional installers. Installing a tankless water heater can be complicated and time-consuming, and it’s important to make sure you have the right tools and know-how before attempting the job.

Tankless Water Heater

FAQs

1. How do tankless water heaters work?

Tankless water heaters, also known as on-demand or demand-type water heaters, provide hot water only when it is needed. They work by heating cold incoming water that runs through a series of coils. As the cold water passes through the coils, it is heated to a set temperature and then sent to the appropriate faucet or shower.

2. Are tankless water heaters energy efficient?

Yes, tankless water heaters are a more energy-efficient option than traditional storage tanks because they only use energy when needed. This means that you will not be wasting energy keeping a large storage tank of hot water heated all the time.

3. What are the benefits of a whole-house tankless water heater?

A whole-house tankless water heater can provide hot water to multiple fixtures at once without experiencing pressure loss or running out of hot water as quickly.

Additionally, it takes up far less space than traditional storage tanks, making it ideal for smaller homes or apartments. Finally, tankless water heaters are generally much more energy efficient than traditional storage tank models.


Conclusion

While there are many whole-house tankless gas water heaters on the market, we believe the top three models reviewed here offer the best combination of value, quality, and features for most homeowners.

We hope our reviews have helped you narrow down your choices and that you will find the perfect unit to meet your needs. If you have any questions or would like more information about any of these products, please feel free to contact us.