Top 9 Picks for the Ultimate Condensing Tankless Water Heaters

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Steve Donaldson Master HVAC technician
Steve Donaldson
Master HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

Hey there! If you're on the hunt for the ultimate condensing tankless water heater, look no further. In this roundup post, I've compiled the top 9 picks that are sure to meet all your hot water needs. Whether you're looking to save on energy bills or enjoy endless hot showers, these water heaters have got you covered. So, let's dive in and find the perfect condensing tankless water heater for you!

1
Rinnai V65iN Tankless Water Heater
✯ Great choice! ✯
BUY NOW Amazon.com
8.9
2
Rinnai Smart-Circ Gas Tankless Water Heater
Worthwhile Investment
BUY NOW Amazon.com
8.9
3
Rheem Tankless Gas Water Heater - RTGH-95XLN
8.9
6
Rheem Indoor Tankless Gas Water Heater
8.2
7
Takagi Ultra-Low NOx Gas Tankless Water Heater
8.1
1

Rinnai V65iN Tankless Water Heater

$669.70  in stock
Amazon.com
as of April 20, 2024 8:17 am
8.9
Great choice!
The Rinnai V65iN Tankless Hot Water Heater is an energy-efficient and compact unit that delivers a continuous supply of hot water. It is easy to set up, works well with LP, and provides quick hot water. However, the installation can be tricky, especially when piping through the roof, and there may be a slight lag time before getting hot water when running faucets. Overall, it is a great product with good customer support.
Efficient & Cost-saving
  • Works great and easy on LP
  • Easy to set up
  • Can be easily winterized
  • Provides hot water quickly
  • Good customer support
Drawbacks
  • Tricky installation for the piping, especially if going through the roof
  • Lag time before getting hot water when running faucets

The Rinnai V65iN Tankless Hot Water Heater is a highly efficient and compact unit that offers advanced technology for your home. It's designed to take up minimal space, about the size of a small suitcase, allowing you to reclaim valuable real estate in your home. With the option to connect to a Rinnai Controlr for WiFi connectivity, this smart on-demand water heater can be made even smarter. You'll enjoy clean, reliable hot water at a consistent temperature while saving energy and precious floor space. Installation may require some effort, but once it's set up, you'll be delighted with the performance of this compact tankless water heater.

Efficient and High-performance Features
  • Energy-efficient design
  • Non-condensing technology
  • Compact size
  • Continuous hot water supply
$669.70
in stock
as of April 20, 2024 8:17 am
Amazon.com
2

Rinnai Smart-Circ Gas Tankless Water Heater

$2,131.80
Amazon.com
as of April 20, 2024 8:17 am
8.9
Worthwhile Investment
The Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater is a highly efficient and reliable product that provides on-demand hot water while saving space. Although the installation instructions can be confusing, the excellent performance and reputation of the Rinnai brand make it a worthwhile investment.
Efficient Hot Water
  • High efficiency
  • On-demand hot water
  • Space-saving design
  • Easy installation process
  • Excellent performance
  • Reliable brand reputation
Drawbacks
  • Installation instructions can be confusing, especially regarding venting options
  • Obtaining the mail-in rebate from the local gas company may require specific installation companies listed on their website

The Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater is an advanced and efficient solution for your hot water needs. With its Smart-Circ technology, this water heater learns your water usage patterns and schedules hot water circulation accordingly, ensuring energy efficiency and convenience. It is compact and takes up minimal space, making it a great option for saving valuable real estate in your home. Additionally, this tankless water heater has received positive reviews for its performance, surpassing traditional tank water heaters. Installation may require the assistance of a professional, but once it's up and running, you can enjoy hot water on demand throughout your home.

Efficient and Convenient Heating Solution
  • Smart-Circ Intelligent Recirculation
  • Compact design
  • High efficiency
  • Never run out of hot water
3

Rheem Tankless Gas Water Heater – RTGH-95XLN

$1,100.59
$749.50
Amazon.com
as of April 20, 2024 8:17 am
8.9
Great choice!
The Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater is a sleek and compact unit that delivers instant hot water while also being energy-efficient and cost-effective. With easy installation and solid performance, this water heater is a great choice for those looking for a reliable and space-saving option. Plus, the added safety features like water and gas leak detection make it a reliable and worry-free choice. Overall, this product seems to have no significant drawbacks according to the reviews.
Efficient and Reliable
Weaknesses
  • No mention of drawbacks or negative experiences in the reviews
  • None of the reviews discuss any specific drawbacks of the Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater

The Rheem Prestige Condensing Tankless Outdoor Natural Gas Water Heater 9.5 GPM – RTGH-95XLN-2 is a sleek and compact unit that delivers hot water without the wait. With its high energy efficiency and low operating cost, it's a smart choice for anyone looking to save on their energy bills. The unit is easy to install and has received positive reviews for its solid performance. It can handle multiple showers simultaneously without any fluctuations in water temperature. This workhorse of a unit is built to last, and with its 12-year heat exchanger warranty, you can have peace of mind knowing that you're making a long-term investment.

Efficient and Reliable Heating Solution
  • Instant hot water delivery
  • Energy-efficient and cost-effective operation
  • Compact and space-saving design
  • Water and gas leak detection for safety and error prevention
4

Rinnai RU160iP Tankless Water Heater

Amazon.com
8.9
Great Investment
The Rinnai RU160iP Condensing Tankless Hot Water Heater is a high-quality, efficient, and reliable product that provides endless hot water flow throughout the house. It has a compact and durable design, easy installation, and optimal water pressure. Although there were some reports of missing parts upon delivery and a slightly longer delay for hot water on cold startup, overall, this tankless water heater is a great investment for energy-saving and space-efficient hot water solutions.
Efficient and Reliable
  • High quality
  • Efficient performance
  • Quiet operation
  • Stable hot water output
  • DIY-friendly installation
  • Dependable and reliable
  • No issues or errors reported
Potential Drawbacks
  • Missing parts upon delivery
  • Slightly longer delay for hot water on cold startup

The Rinnai RU160iP Condensing Tankless Hot Water Heater is a compact and durable unit that offers endless hot water flow throughout the house. Its super high-efficiency plus condensing technology ensures optimal water pressure and energy efficiency, saving you money on your gas and electric bills. While the installation process may require some DIY skills, it's manageable and rewarding. With its quiet operation and stable hot water output, this tankless water heater is a stellar addition to any home.

Efficient and Reliable Hot Water
  • Endless hot water flow throughout the house
  • Compact and durable design
  • Easy installation
  • Energy-saving and space-efficient
  • Optimal water pressure
5

EZ Ultra HE Natural Gas Tankless Water Heater

$669.95
Amazon.com
as of April 20, 2024 8:17 am
8.4
The EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater is a space-saving and energy-efficient option for smaller homes or specific areas with moderate water usage. Its continuous runtime and unlimited capacity make it perfect for filling larger water containers, but users should be aware that water temperature and volume can impact the flow of hot water, and the heater won't run during power outages.
Why Choose EZ Ultra
  • Space-saving design
  • Energy-efficient, resulting in cost savings
  • Ability to shut down when not in use, saving energy
  • Smart plug with energy monitoring for control and consumption tracking
  • Perfect for smaller homes or specific areas with moderate water usage
  • Continuous runtime allows for filling larger water containers, such as hot tubs
  • Instant heat and unlimited capacity, unlike traditional tank heaters
Drawbacks
  • Water temperature and volume can impact the flow of hot water
  • The heater won't run when the power is out

The EZ Ultra HE Natural Gas Indoor Condensing Tankless Water Heater is the perfect solution for efficiently heating water in your home. With its condensing technology, this heater uses exhaust gas to preheat incoming water, maximizing its efficiency. It can be vented either horizontally or vertically, giving you flexibility in installation. The back-draft prevention device and stainless steel horizontal vent pipe ensure safe and reliable operation. Customers have praised this water heater for its performance, especially when set to a comfortable temperature of 46C (115F). It is also compact, taking up only a fraction of the space compared to traditional water tanks. Additionally, it offers significant energy savings, with one customer reporting a monthly saving of approximately $80 on water heating. The ability to completely shut down the heater when unoccupied is another great feature, allowing you to save even more energy. The EZ Ultra HE is highly recommended for homes with moderate water usage and is a reliable choice for continuous hot water supply.

Explore further:  The Ultimate Guide to the Top 9 Electric Stove Heaters for Cozying Up Your Space
Efficient and Eco-Friendly
  • Condensing Technology
  • Horizontal or vertical venting options
  • Back-draft prevention device
  • Stainless steel horizontal vent pipe
6

Rheem Indoor Tankless Gas Water Heater

$1,188.00
Amazon.com
as of April 20, 2024 8:17 am
8.2
Great choice!
The Rheem RTGH-84DVLN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater is an excellent choice for those seeking a continuous hot water supply with energy-efficient operation and the ability to use it for multiple applications. However, some users may experience difficulty in getting support and there may be potential issues with the water flow sensor.
Efficient and Convenient
  • Continuous hot water supply
  • Energy-efficient operation
  • Multiple application usage
Weaknesses
  • Difficulty in getting support
  • Potential issues with water flow sensor

The Rheem RTGH-84DVLN-3 Super High Efficiency Condensing Indoor Tankless Natural Gas Water Heater is a compact and efficient solution for your hot water needs. With its exclusive Hot Start Programming, you won't have to worry about cold water bursts, even with back-to-back use. The overheat protection and peace of mind provided by the Overheat Film Wrap ensure a safe and continuous supply of hot water throughout your entire home. This water heater is not only energy-saving, but also helps save water. Installation by a professional is required to maintain the warranty. With a 15-year heat exchanger warranty, 5-year parts warranty, and 1-year labor warranty, you can enjoy reliable hot water for years to come.

Efficient and Reliable Performance!
  • Continuous hot water supply
  • Energy-efficient operation
  • Multiple application usage
  • Water-saving functionality
7

Takagi Ultra-Low NOx Gas Tankless Water Heater

 in stock
Amazon.com
8.1
Great Choice!
The Takagi TK-340X3-NIH Condensing Ultra-Low NOx High Efficiency Natural Gas Indoor Tankless Water Heater is a highly efficient and environmentally friendly option with a high heating capacity of 180,000 BTUs. However, it does have limited installation options and a higher upfront cost.
Efficient and Eco-Friendly
  • Energy-efficient
  • Environmentally friendly
  • High heating capacity
Limitations
  • Limited installation options
  • Higher upfront cost

The Takagi TK-340X3-NIH Condensing Ultra-Low NOx High Efficiency Natural Gas Indoor Tankless Water Heater is a game-changer for residential water heating. With its innovative X3 Scale Prevention Technology, this tankless water heater is designed to last three times longer than other models without X3 Technology. It not only provides efficient and continuous hot water, but also complies with Ultra-Low NOx regulations, making it environmentally friendly. The TK-340X3-NIH features commercial grade copper alloy heat exchanger tubing, ensuring durability and reliability. With its compact size and indoor installation style, this water heater is perfect for any home.

Innovative Water Heating Technology
  • Condensing technology
  • Ultra-low NOx emissions
  • High efficiency
  • Natural gas powered
  • Indoor installation
  • 180,000 BTUs heating capacity
8

Rheem Tankless Water Heater – RTGH-68VLN-2

$1,001.00
Amazon.com
as of April 20, 2024 8:17 am
8
Impressive and efficient
The Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater is a highly efficient and space-saving unit that provides instant hot water. Its water and gas leak detection feature adds an extra layer of safety. While professional installation is required, the product offers significant gas bill savings with a quick payback period estimated to be less than 3 years. The only drawback is that temperature control has a maximum setting of 120 degrees Fahrenheit.
Efficient and Reliable
  • Professional installation required
  • No need for technical support
  • Significant reduction in gas bill
  • Payback period estimated to be less than 3 years
Potential Limitations

The Rheem Prestige Condensing Tankless Indoor Natural Gas Water Heater is a high efficiency unit designed to provide continuous hot water. With industry-leading low flow activation and a minimum activation flow rate, you can be sure to receive hot water even in low demand situations. The Ultra Low NOx burner meets safety requirements with low emissions, and the exclusive Guardian Overheat Film Wrap ensures safety by preventing the unit from reaching dangerous temperatures. With maintenance notification settings, a self-diagnostic system, and an EcoNet enabled mobile app feature, this water heater offers convenience and peace of mind. The compact design makes it perfect for replacing a traditional tank heater, and the water and gas leak detection feature ensures safety by shutting down the unit and providing an error notification. With a professional installation, you'll enjoy hot water without the wait and the waste, and benefit from low operating costs due to its high energy efficiency and water savings setting. Overall, this Rheem Prestige tankless water heater is a reliable and efficient choice for up to 3 bathrooms.

Efficient
  • Instant hot water
  • Energy efficient
  • Space-saving design
  • Water and gas leak detection
9

Rinnai RSC160iN Gas Tankless Water Heater

$1,878.75
Amazon.com
as of April 20, 2024 8:17 am
8
Overall
The Rinnai RSC160iN Smart-Circ Condensing Gas Tankless Water Heater is an energy-efficient and easy-to-install option that provides ample hot water for larger households. However, it does not include a wireless unit and calculating exact water savings may be difficult.
Efficient and Reliable
  • Energy-efficient: The Rinnai RSC160iN Smart-Circ Condensing Gas Tankless Water Heater offers super high efficiency, resulting in significant savings on gas bills
  • Easy installation: It is straightforward to install, with or without the crossover valve, making it hassle-free to set up
  • Ample capacity: With a flow rate of up to 9 gallons per minute, this water heater provides more than enough hot water for larger households with multiple bathrooms in use
Cons
  • No wireless unit included
  • Hard to calculate exact water savings

The Rinnai RSC160iN Smart-Circ Condensing Gas Tankless Water Heater is a fantastic unit that offers the most advanced technology in water heating. With its Smart-Circ feature, this water heater learns your water usage patterns and anticipates your hot water needs, providing you with superior energy efficiency and convenience. Not only does it save energy, but it also saves water by eliminating the need to run the cold water to get hot water to distant showers. This compact and Energy Star qualified water heater is perfect for any home, and its capacity is more than enough for large houses with multiple bathrooms. Installation is straightforward, and you can even make it smarter with Wi-Fi connectivity. Customers have reported significant savings on their gas bills and are extremely satisfied with this unit.

Efficient and Reliable Performance
  • Smart-Circ Intelligent Recirculation
  • Super High Efficiency
  • Up to 9 GPM
  • Indoor Installation
  • 160,000 BTU

Discover the Latest and Greatest Condensing Tankless Water Heaters!

Affordable Efficiency: Unbeatable Value for Your Home

  • Entry-level options: $500-$800
  • These water heaters are affordable and offer basic features. They may have a lower flow rate and a smaller heating capacity compared to higher-priced options
  • Mid-range options: $800-$1,500
  • These water heaters offer a good balance between price and performance. They typically have a higher flow rate, larger heating capacity, and may include additional features such as digital controls and energy-saving modes
  • High-end options: $1,500-$3,000+
  • These water heaters are top-of-the-line and come with advanced features and technologies. They usually have a high flow rate, large heating capacity, and may include features like Wi-Fi connectivity, self-cleaning capabilities, and precise temperature control
  • It's important to note that the actual prices may vary depending on the brand, model, and specific features of each water heater. Additionally, installation costs are not included in these price ranges
Steve Donaldson Master HVAC technician
Steve DonaldsonMaster HVAC technician at Quality Comfort Home Services

I am Steve Donaldson, a Master HVAC technician with a rich background in addressing heating issues, especially when it comes to various types of water heaters. Leveraging my extensive expertise, I offer insights and advice to help individuals maintain a warm and secure home environment. Reach out to me at steve.donaldson@tedreviews.com for valuable tips from a seasoned professional in the industry.

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