Top 6 Tankless Gas Water Heaters with Recirculating Pumps for Ultimate Efficiency

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! Looking to upgrade your water heater to something more efficient? Well, you're in luck! In this post, I'll be sharing with you the top 6 tankless gas water heaters with recirculating pumps, specifically designed for ultimate efficiency. Say goodbye to wasting energy and hello to endless hot water. Let's dive in!

1
Rinnai Smart-Circ Tankless Water Heater
✯ Reliable and affordable ✯
BUY NOW Amazon.com
8.9
2
Rinnai RSC199iN Gas Tankless Water Heater
Impressive Choice
BUY NOW Amazon.com
8.9
3
Rinnai RL94iP Propane Tankless Water Heater
Efficient and Reliable
BUY NOW Amazon.com
8.7
1

Rinnai Smart-Circ Tankless Water Heater

$1,349.99
Amazon.com
as of April 18, 2024 11:22 pm
8.9
Reliable and affordable
The Rinnai REP199iN Smart-Circ Non-Condensing Natural Gas Tankless Water Heater is a reliable and affordable option for those looking for hot water on demand. With its built-in recirculation pump and smart-circ technology, it offers energy efficiency and convenient scheduling. While the installation requirements may be lacking information and the exhaust pipe is not included, this tankless water heater has the potential for long-term use and provides a reliable performance.
Efficient and Convenient
  • Easy installation
  • Reliable performance
  • Affordable price compared to other tankless water heaters
  • Provides hot water on demand
  • Potential for long-term use
Limitations
  • Limited information provided about installation requirements
  • Exhaust pipe not included with the product

The Rinnai REP199iN Smart-Circ Non-Condensing Natural Gas Tankless Water Heater with Built-In Recirculation Pump is a high-efficiency indoor water heater that offers advanced technology for your home. It comes with a built-in recirculation pump and Smart-Circ technology that learns your water usage patterns, ensuring hot water is readily available when you need it. This tankless water heater is compact and easy to install, taking up minimal space. It also has a longer lifespan compared to traditional tank heaters, thanks to its continuous circulation that prevents sediment buildup. Overall, this smart on-demand hot water heater provides energy efficiency, convenience, and a constant supply of hot water.

Efficient and Convenient Technology
  • Built-in recirculation pump
  • Smart-Circ technology
  • Energy efficiency
  • Convenient scheduling
  • Never run out of hot water
2

Rinnai RSC199iN Gas Tankless Water Heater

Amazon.com
8.9
Impressive Choice
The Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater is a high-performing and efficient option that provides fast and reliable hot water. Its compact size and easy installation process make it a convenient choice, although professional help may be needed for installation. The heater's instant hot water feature is beneficial, but caution is advised with small children. Overall, this product offers excellent performance and is made with high-quality craftsmanship.
Efficient and Endless Hot Water
  • Excellent performance
  • Fast and efficient heating
  • Compact size, saving space
  • Easy installation process
  • Made in Japan, indicating high quality craftsmanship
Cons
  • Installation may require professional help
  • Water comes out hot almost instantly, so caution is needed with small children

The Rinnai RSC199iN Smart-Circ Condensing Gas Tankless Water Heater is a super high-efficiency plus natural gas water heater that offers advanced technology for superior performance. With Smart-Circ™ technology, this water heater learns your water usage patterns and starts circulating hot water on your schedule, ensuring you have hot water when you need it and saving energy when you don't. Its compact design takes up minimal space, allowing you to reclaim valuable real estate in your home. This Energy Star qualified water heater can even be made smarter with Wi-Fi connectivity. With its exceptional performance, this Rinnai model is a great choice for any household.

Efficient and Powerful Performance
  • Smart-Circ Intelligent Recirculation
  • Superior energy efficiency
  • Convenient scheduling
  • Never run out of hot water
  • Compact design
  • High BTU rating
3

Rinnai RL94iP Propane Tankless Water Heater

$636.22  in stock
Amazon.com
as of April 18, 2024 11:22 pm
8.7
Efficient and Reliable
The Rinnai RL94iP Tankless Hot Water Heater is a reliable and durable propane-fueled unit that provides a high flow rate of 9.8 GPM, ensuring an ample supply of hot water. Its indoor installation is convenient and suitable for various living spaces, and it is energy-efficient, helping to save on propane and potentially reduce electric bills. Although the temperature may not go higher than 120 degrees, the quick heating feature ensures hot water in a timely manner, although there may be a slight delay in reaching the faucet or shower head.
Efficient and Reliable
  • High capacity – 9.8 GPM ensures an ample supply of hot water
  • Indoor installation – Convenient and suitable for various living spaces
  • Reliable and durable – Positive reviews indicate long-lasting performance
  • Energy-efficient – Helps save on propane and potentially reduces electric bills
  • Quick heating – Provides hot water in a timely manner
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Weaknesses
  • Temperature may not go higher than 120 degrees
  • Hot water may have a delay in reaching the faucet or shower head

The Rinnai RL94iP Tankless Hot Water Heater is a compact and high-efficiency propane-powered unit that delivers clean and reliable hot water on demand. With its small size, it takes up minimal space in your home, making it ideal for indoor installation. The Circ-Logic technology offers recirculation patterns that match your habits, ensuring you never run out of hot water. While some users have mentioned a slight delay in hot water or a cold water sandwich, overall, the Rinnai RL94iP performs well and provides plenty of hot water for multiple showers and laundry. It is also energy-saving and can overcome cold basement temperatures. The unit can be further enhanced with a Rinnai Controlr for WiFi connectivity.

Efficient and reliable hot water
  • Tankless design
  • Circ-Logic technology
  • Propane fueled
  • Indoor installation
  • High flow rate of 9.8 GPM
  • Never run out of hot water
4

Rheem Prestige Tankless Gas Water Heater – RTGH-RH10DVLN

 in stock
Amazon.com
8.2
Innovative and efficient
The Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater is an energy-efficient and space-saving option that provides instant hot water. With the ability to adjust water temperature and add a recirculation device, it offers convenience and customizable comfort. However, it lacks included installation instructions and requires an additional purchase for WiFi connectivity.
Top-Notch Performance
  • Professional installation available for natural gas units
  • Option to adjust water temperature to desired level
  • Ability to add recirculation device for instant hot water
Cons
  • Lack of included installation instructions
  • Additional purchase required for WiFi connectivity

The Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater is a high-efficiency unit designed to provide continuous hot water with minimal waste. With its built-in recirculation pump and auto-learning program, you can enjoy instant hot water whenever you need it. The water heater features industry-leading low flow activation, ensuring a minimum flow rate for efficient operation. It also comes with various safety features, such as flame sensor, overheat cut off switch, and gas and water leak detectors. The unit is compact and space-saving, making it perfect for tank replacements. Please note that professional installation is required to ensure proper functioning and maintain the warranty.

Efficient and Powerful Heating Solution
  • Instant hot water
  • Energy efficient
  • Space-saving design
  • Water and gas leak detection
5

Rheem Prestige Gas Water Heater – RTGH-RH11DVLN

$1,797.47  in stock
Amazon.com
as of April 18, 2024 11:22 pm
7.8
Top-notch choice
The Rheem Prestige Condensing Tankless Gas Water Heater offers immediate hot water, high energy efficiency, and compact design, making it a great choice for replacing a tank and saving space. With a high water flow rate of 11.0 GPM and a built-in recirculation system, it ensures convenience and efficiency. However, it is important to note that the plastic flame sensor window may be prone to failure and the gas fittings may come loose from the factory.
Efficient and Reliable
  • High water flow rate of 11.0 GPM
  • Built-in recirculation system
  • Compact size
  • Easy operation
  • Efficient gas consumption
Weaknesses
  • Plastic flame sensor window prone to failure
  • Gas fittings may come loose from the factory

The Rheem Prestige Condensing Tankless Gas Indoor Natural Gas Water Heater With Built-in Recirculation 11.0 GPM – RTGH-RH11DVLN is a high efficiency condensing indoor natural gas tankless water heater. It provides continuous hot water and has a built-in recirculation pump with auto-learning programming, ensuring instant hot water when needed. This water heater has industry leading low flow activation and meets safety requirements for low emissions. It also comes with additional safety features such as flame sensor, overheat cut off switch, gas and water leak detectors, and exhaust and water temperature sensors. With a compact design, it is perfect for replacing a traditional water heater and can be used with up to 5 bathrooms depending on the inlet temperature. However, professional installation is required for warranty to be valid. The warranty for this product includes 12 years for the heat exchanger, 5 years for parts, and 1 year for labor.

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Efficient and Reliable Performance
  • Built-in recirculation for immediate hot water without waiting
  • High energy efficiency and water savings setting for low operating costs
  • Compact design for saving space, ideal for tank replacement
  • Water and gas leak detection for safety and error prevention
6

Eccotemp FVI12-LP Tankless Water Heater

 in stock
Amazon.com
7.1
Worthwhile investment
The Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heater is a reliable and efficient choice for small homes, cabins, or apartments. With its compact size and energy-saving activation, it provides hot water on demand while saving energy. Although the installation instructions may be confusing and additional parts are required, the longevity and consistent operation make it a worthwhile investment.
Efficient and Versatile
  • Longevity – The unit has worked well for at least 5 years for some users
  • Consistent operation – The unit consistently provides hot water
  • Compact size – The tankless design allows for a smaller footprint compared to traditional water heaters
  • Energy efficiency – Tankless water heaters are known for their energy efficiency compared to tank storage heaters
  • Provides hot water on demand – Tankless water heaters are able to provide hot water continuously, without the need for a storage tank
Drawbacks
  • Confusing installation instructions
  • Additional parts required for installation

The Eccotemp FVI12-LP Liquid Propane Gas Tankless Water Heater is a highly advanced indoor model that can meet all your hot water needs. With a rating of 4.0 GPM and a temperature rise of 38 degrees, this tankless water heater is perfect for smaller single-family homes, apartments, condos, or cabins. It features Eccotemp's low flow ignition technology, ensuring endless hot water without cold spots. The manual temperature controls allow for easy adjustment, and the compact, wall-mounted design makes installation a breeze. With its upgraded performance and affordable price, the Eccotemp FVI12-LP is the ideal choice for efficient and reliable hot water heating.

Efficient and Reliable Heating Solution
  • Whole home indoor gas powered tankless water heater
  • Rated at 3.6 GPM for efficient water heating
  • Energy-saving activation only when in use
  • Safe and efficient power ventilation
  • Perfect for small homes, cabins, or apartments
  • Easy-to-read digital display

Find answers to your questions about the best tankless gas water heater with recirculating pump

Are there any specific brands or models that are highly recommended for this type of water heater?

Based on my expertise, there are a few brands and models that are highly recommended for water heaters. One popular brand is Rheem, known for its high-quality and energy-efficient models. The Rheem Performance Platinum series, in particular, has received positive reviews for its durability and excellent performance. Another reputable brand is AO Smith, which offers a range of reliable and efficient water heaters. Their ProLine series is often recommended for its innovative features and long lifespan. Additionally, Bradford White is a well-regarded brand known for its durable and efficient water heaters. Their Defender series is highly recommended for its exceptional performance and reliability. It's important to note that the best brand or model for you may depend on your specific needs and preferences, so I would recommend conducting further research and consulting with a professional to determine the most suitable option for your specific situation.

Can the recirculating pump be used with both hot and cold water lines?

Yes, the recirculating pump can be used with both hot and cold water lines. The purpose of a recirculating pump is to maintain a constant flow of water throughout the plumbing system, ensuring hot water is readily available at the fixtures when needed. By continuously circulating the water, it helps to eliminate the delay in receiving hot water, which is especially beneficial in large buildings or homes with long pipe runs. The pump can be installed in the hot water line, and some models even have the option to be installed in both the hot and cold water lines for maximum efficiency.

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Are there any specific installation requirements for a tankless gas water heater with a recirculating pump?

Yes, there are specific installation requirements for a tankless gas water heater with a recirculating pump. Here are some key points to consider:

  1. Location: The water heater should be installed in a well-ventilated area, preferably outdoors or in a well-ventilated room. It is important to follow the manufacturer's guidelines for clearance distances from combustible materials.
  2. Gas Supply: Ensure that the gas supply line is properly sized and meets the requirements of the water heater. It is recommended to consult a professional plumber or gas fitter for this task.
  3. Water Supply: The water heater should be connected to a dedicated cold-water line, as well as a hot water recirculation line. The recirculation line should be properly insulated to minimize heat loss.
  4. Electrical Connection: Some tankless gas water heaters may require an electrical connection for ignition or control purposes. Follow the manufacturer's instructions for proper electrical installation.
  5. Venting: Proper venting is crucial to ensure the safe operation of the tankless gas water heater. Venting requirements may vary depending on the specific model and local building codes. It is advisable to consult a professional to ensure proper venting installation.
  6. Recirculating Pump: The recirculating pump should be installed according to the manufacturer's instructions. It is typically placed on the hot water line, near the water heater, to ensure efficient circulation of hot water throughout the system.

How does a tankless gas water heater with a recirculating pump work?

A tankless gas water heater with a recirculating pump works by providing hot water on demand without the need for a storage tank. Let me explain how it works.

Firstly, when you turn on a hot water faucet in your home, cold water enters the tankless gas water heater unit. The water flows through a heat exchanger, which is heated by a gas burner. This heats the water rapidly as it passes through the unit.

The tankless gas water heater detects the flow of water and activates the gas burner to heat the water to the desired temperature. The heated water then flows out of the unit and into your plumbing system, delivering hot water directly to your faucet or shower.

Now, let's talk about the recirculating pump. In some tankless gas water heater systems, a recirculating pump is used to continuously circulate hot water through the plumbing system. This is done to ensure that hot water is available instantly at any faucet or shower in your home, without having to wait for the water to reach the desired temperature.

The recirculating pump is typically equipped with a dedicated return line that connects to the hot water lines in your plumbing system. This pump keeps the hot water continuously circulating, eliminating the need to wait for hot water and reducing water wastage.

The recirculating pump can be activated manually or can be set on a timer to operate at specific times of the day when hot water usage is high. Some advanced systems even use motion sensors or smart technology to activate the pump only when hot water is needed.

In summary, a tankless gas water heater with a recirculating pump provides hot water on demand without the need for a storage tank. It rapidly heats the incoming cold water using a gas burner and delivers hot water directly to your faucets and showers. The recirculating pump ensures instant hot water by continuously circulating the hot water through the plumbing system.

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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9 Comments
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  1. Could you expand on the recirculating pump feature of these tankless gas water heaters? How does it contribute to their overall efficiency?

    • Certainly! The recirculating pump feature helps maintain hot water availability at the tap without any waiting time. It reduces water wastage and enhances overall efficiency by ensuring hot water is readily available whenever needed.

  2. Great roundup! I would suggest including the Navien NPE-240A Premium Condensing Tankless Gas Water Heater with Recirculation Pump. It’s known for its high efficiency and reliable performance.

  3. I appreciate your expertise in putting together this roundup. It’s evident that you’ve done thorough research and analysis to provide readers with the best options for ultimate efficiency.

  4. Have you considered reviewing the latest models of these tankless gas water heaters? I’m curious to know if there have been any significant advancements or improvements.

  5. Thank you for this roundup! I completely agree with your choice of the Rinnai Smart-Circ Tankless Water Heater. It’s an excellent option for those looking for both efficiency and convenience.

    • Thank you for your kind words! I’m glad you agree with the choice of the Rinnai Smart-Circ Tankless Water Heater. It’s definitely a top performer in terms of efficiency and convenience.

  6. Thank you for your kind words! I’m glad you agree with the choice of the Rinnai Smart-Circ Tankless Water Heater. It’s definitely a top performer in terms of efficiency and convenience.

    • Thank you for your comment! You bring up a valid point about the pricing. I will make sure to include a section in future articles that delves deeper into the long-term value and energy savings of these tankless gas water heaters.

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