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Home » Best Tankless Gas Water Heaters 2022

Best Tankless Gas Water Heaters 2023

December 18, 2022 by Editorial Team

What is a tankless water heater? Water heaters are described as “tankless” when they heat water as it passes through, rather than storing hot water in an insulated storage tank. This is also known as “on-demand” water heating. These heating systems are more energy-efficient, more durable, and more compact than standard water heaters. They can be more expensive up front, but they pay for themselves over time.

To help you select the best tankless gas water heater for you, here’s what to look for and our top picks at a variety of price points.

# Preview Product Price
1 Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation Price not available Buy on Amazon
2 Supplying Demand RTG20235C Tankless Gas Water Heater Ignitor Coil Replacement Supplying Demand RTG20235C Tankless Gas Water Heater Ignitor Coil Replacement $29.99 Buy on Amazon
3 Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas) Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas) $299.99 Buy on Amazon
4 Rinnai V65eN Non-Condensing Natural Gas Tankless Water Heater, Outdoor Installation, Up to 6.5 GPM Rinnai V65eN Non-Condensing Natural Gas Tankless Water Heater, Outdoor Installation, Up to 6.5 GPM $681.74 Buy on Amazon
5 EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG $219.00 Buy on Amazon
6 Rheem Mid-Efficiency 7.0GPM Indoor Natural Gas Tankless Water Heater Rheem Mid-Efficiency 7.0GPM Indoor Natural Gas Tankless Water Heater $804.00 Buy on Amazon
7 Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series $699.00 Buy on Amazon
8 Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater $1,499.00 Buy on Amazon
9 Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU $1,310.00 Buy on Amazon
10 MAREY GA5FLP 1.32 GPM, 34,120 BTU's LP Gas Flow Activated Tankless Water Heater, White MAREY GA5FLP 1.32 GPM, 34,120 BTU’s LP Gas Flow Activated Tankless Water Heater, White $145.49 Buy on Amazon

Our Editor’s Best Tankless Gas Water Heaters Reviews


Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

 Rinnai RU199iN Condensing Tankless Hot Water Heater, 11 GPM, Natural Gas, Indoor Installation

Key Features:

  • This tankless gas water heater provides an unlimited amount of hot water flow throughout the house. It is compact and durable, and easy to install. Professional installation is recommended.

  • This tankless gas water heater is designed to be energy and space efficient. It has a space-saving design that conserves energy by only heating when necessary.

  • This tankless gas water heater has a hot water flow rate of up to 11 gallons per minute, providing a powerful, constant stream of hot water.

  • This tankless gas water heater is designed for instant heating, with an external pump to reduce wait time for hot water. The recirculation feature allows you to schedule or demand hot water as needed.

  • This tankless gas water heater is guaranteed to last for 15 years, 5 years, and 1 year for the heat exchanger, labor, and parts, respectively. It also has wifi monitoring.

Price not available Buy on Amazon


Supplying Demand RTG20235C Tankless Gas Water Heater Ignitor Coil Replacement

 Supplying Demand RTG20235C Tankless Gas Water Heater Ignitor Coil Replacement

Key Features:

  • This is a tankless gas water heater that uses a 120V ignitor coil to heat the water.

  • If the igniter on this tankless gas water heater fails, the burner will not light, meaning that the water will not be heated.

  • This is a tankless gas water heater. It is small and can be mounted on a wall. It is powered by natural gas or propane. The unit is activated by an ignitor that gets the correct voltage. It then heats the water as it passes through the unit.

  • A tankless gas water heater is a water heater that does not have a storage tank. It heats water directly from the water supply, so it does not require a storage tank. These units are more expensive than traditional water heaters, but they are more efficient and have a longer lifespan.

  • This means that the tankless gas water heaters are being supplied by a company called Supplying Demand.

$29.99 Buy on Amazon


Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

 Tankless Water Heater, 3.17 GPM Instant Hot Natural Gas Water Heater with Constant Temperature, Indoor (Natural Gas)

Key Features:

  • This tankless gas water heater is for a shopper who wants to be able to heat their water without having to worry about a tank. This product is easy to install and comes with a installation manual and product manual.

  • The tankless gas water heater is a water heater that does not need to be preheated before using it. As soon as you turn on the tap, the water flows with your desired temperature.

  • This tankless gas water heater has a high sensitive touch LED display that allows you to freely adjust the temperature between 30℃-65℃.

  • The tankless gas water heater is a safe and reliable choice for your home. It is equipped with 12 protection methods to ensure your safety, including dry burning protection, over 65℃(149 °F) protection, leakage protection, etc.

  • This tankless gas water heater is designed to be energy and money saving. It has two modes, summer and winter, which can save up to 60% on your natural gas costs.

  • This tankless gas water heater is made with brushed stainless steel material and has the function of high temperature resistance and corrosion resistance. It also has a built-in oxygen-free copper water tank for a long service time. Note: This product must be installed with a ventilation and smoke exhaust pipe for normal use.

$299.99 Buy on Amazon


Rinnai V65eN Non-Condensing Natural Gas Tankless Water Heater, Outdoor Installation, Up to 6.5 GPM

 Rinnai V65eN Non-Condensing Natural Gas Tankless Water Heater, Outdoor Installation, Up to 6.5 GPM

Key Features:

  • This is a tankless gas water heater that only heats when necessary to conserve energy. It is designed for the latest in non-condensing technology and has a cleaner layout that speeds up service and installation.

  • This is a tankless gas water heater that is compact and fits in a wide variety of spaces. It provides up to 6.5 GPM of hot water.

  • This is a tankless gas water heater that is designed to be durable and prevent damage from scale buildup. It comes with a 15-, 5-, and 1-year guarantee for the heat exchanger, labor, and parts, respectively. The Controlr module (not included) can be used to control the unit via WiFi.

  • This tankless gas water heater must be installed by a qualified technician and Rinnai does not recommend installing the water heater without a technician.

  • A tankless gas water heater is a water heater that does not have a tank. It uses gas to heat water and is more efficient than a traditional water heater.

$681.74 Buy on Amazon


EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG

 EXCEL TANKLESS GAS WATER HEATER Vent Free (LOW WATER PRESSURE STARTUP) 1.6 GPM PROPANE LPG

Key Features:

  • This tankless gas water heater is powered by propane, making it a great choice for those who want to use an alternative fuel source. It is also a great choice for those who want the convenience of not having to worry about a tank of water.

  • The tankless gas water heater is a great choice for a shopper who is looking for an energy-efficient way to heat their water. This unit starts with only 2 PSI of water pressure, making it an Amazon exclusive. It is also a great choice for those who want to save space, as it is compact and can be mounted on a wall.

  • This is a tankless gas water heater that does not require a flue, making it more affordable than other models.

  • This tankless gas water heater is compact in size, measuring 11.5 inches in width, 6 inches in depth, and 16 inches in height.

  • This is a tankless gas water heater that comes with two size D batteries for automatic ignition.

$219.00 Buy on Amazon


Rheem Mid-Efficiency 7.0GPM Indoor Natural Gas Tankless Water Heater

 Rheem Mid-Efficiency 7.0GPM Indoor Natural Gas Tankless Water Heater

Key Features:

  • This tankless gas water heater provides an endless supply of hot water, so you’ll never have to worry about running out – even if you have multiple showers back to back.

  • This tankless gas water heater is cost saving and energy efficient. It is also easy to install and requires no maintenance.

  • This tankless gas water heater will save the shopper energy by automatically adjusting the amount of energy needed to heat the water, based on how much the shopper needs.

  • The Rheem tankless gas water heater is a water heater that automatically adjusts the amount of energy required to heat the water you need. This reduces energy consumption and makes it more efficient than traditional water heaters.

  • This tankless gas water heater is easy to control with a remote electronic thermostat. You can easily adjust the water temperature from 85 degrees Fahrenheit to 140 degrees Fahrenheit.

$804.00 Buy on Amazon


Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series

 Natural Gas Tankless Water Heater, FOGATTI Indoor 7.5 GPM, 170,000 BTU White Instant Hot Water Heater, InstaGas Comfort 170 Series

Key Features:

  • This tankless gas water heater is recommended to be installed by a licensed professional, and the local building and plumbing codes of the installation location must be followed.

  • A tankless gas water heater is a type of water heater that does not store hot water in a tank. Instead, it heats water on demand, meaning that you don’t have to wait for the water to heat up before using it. This makes it a great option for people who want to save space and have unlimited access to hot water.

  • A tankless gas water heater with a high heating capacity of 170,000 BTUs and a maximum flow rate of 7.5 gallons per minute. It is suitable for 3-4 outlet points, which can satisfy the needs of a whole family. With an energy conversion rate of over 0.82, it is highly efficient and can effectively reduce energy loss.

  • The tankless gas water heater is an excellent quality appliance that is certified in the United States and Canada. It adopts the world’s most advanced technology and is superior in safety and durability.

  • This tankless gas water heater is designed for easy installation and features a built in forced exhaust fan for stable combustion.

  • This tankless gas water heater has a free replacement policy for 30 days and a 5 year warranty on the heat exchanger. There is also a 2 year warranty on other parts.

$699.00 Buy on Amazon


Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

 Rheem Prestige High Efficiency 9.5GPM Indoor Natural Gas Tankless Water Heater

Key Features:

  • A tankless gas water heater is a water heater that heats water without storing it in a tank. This means that you don’t have to wait for the water to heat up, and you don’t have to worry about the water being wasted.

  • This tankless gas water heater is designed for low operating costs and high energy efficiency. It features a water savings setting that can help you save money on your water bill.

  • This tankless gas water heater is space-saving and perfect for replacing an old tank.

  • This tankless gas water heater will shut down if it detects a water or gas leak, and it will provide an error code.

  • This tankless gas water heater is for use indoor only.

$1,499.00 Buy on Amazon


Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

 Takagi T-H3-DV-N Condensing High Efficiency Natural Gas Indoor Tankless Water Heater, 10-Gallon Per Minute, 199,000 BTU

Key Features:

  • A tankless gas water heater is a water heater that does not store water in a tank. Instead, it heats water on demand, which means that you only use energy when you need hot water. This makes tankless gas water heaters more energy efficient than traditional water heaters. They are also more compact and space-saving than traditional water heaters.

  • This tankless gas water heater is safe to use because it has computerized safety features, and you don’t have to worry about a pilot light.

  • The tankless gas water heater is a safe and reliable choice for your home. It is equipped with freeze, overheat, surge protection, and troubleshooting diagnostic codes to help keep your family safe.

  • This tankless gas water heater has been designed to emit ultra-low levels of NOx, meeting the 2012 SCAQMD Rule 1146.2. This makes it a great choice for anyone looking for an environmentally friendly option.

  • This tankless gas water heater is made with a commercial-grade copper alloy for better heat transfer, and has integrated controls and a power cord as standard features.

$1,310.00 Buy on Amazon


MAREY GA5FLP 1.32 GPM, 34,120 BTU’s LP Gas Flow Activated Tankless Water Heater, White

 MAREY GA5FLP 1.32 GPM, 34,120 BTU's LP Gas Flow Activated Tankless Water Heater, White

Key Features:

  • This is a tankless gas water heater that is eco-friendly and saves energy. It is white and weighs 10.14 pounds.

  • This tankless gas water heater is battery powered and starts with pulse ignition. It does not require any cords or plugs, making it very convenient to use.

  • This is a tankless gas water heater that will shut off automatically if it senses any type of problem, such as a dry combustion, over-pressure, or overheating. It also has a flameout protection feature. This water heater also has two solenoid valves that help to regulate the flow of gas and water.

  • This tankless gas water heater is ideal for indoor use in apartments, cabins, and tiny homes. You can control your temperature year-round with the convenient summer/winter switch. Note that it is not recommended for elevations above 2,000 feet.

  • If you are in the market for a tankless gas water heater, this model may be a good option for you. Some of its features include a 1.32-GPM heater, a minimum activation rate of 0.65 GPM, and a maximum input rating of 34,120 BTUs. Additionally, it has a minimum temperature of 6.80 to 66 degrees Fahrenheit and a water connection location/size of bottom/0.5-inch NPT.

$145.49 Buy on Amazon


Best Tankless Gas Water Heaters Buying Guide

Before choosing the best tankless gas water heater you should consider following options:

1. Energy efficiency: Tankless water heaters have a higher energy efficiency rating than conventional tank water heaters. Because the new energy efficient models are more efficient, they tend to run at a higher temperature, which reduces energy consumption.

2. Installation: Tankless water heaters can be installed in two ways. The first is as an individual unit or series of units connected to a water pipe. The second is as part of a new or existing water pipe system.

3. Power source: A tankless water heater can be powered by electricity, gas or solar. The cost of installation and operating costs vary depending on the energy used.

4. Capacity: Tankless water heaters have a higher capacity than conventional tank water heaters. The two types of tankless water heaters are the individual units and the series. Individual units have a capacity of up to 2 gallons per minute (GPM), while series units have a capacity of up to 12 GPM.

5. Installation costs: The cost of installation depends on several factors, including the type of energy used (electricity, gas or solar) and the location of the installation. Electricity is the least expensive and the easiest to install, but electricity is not always readily available in all locations.

6. Maintenance costs: Maintenance costs vary depending on the type of energy used and the number of units. Electricity is the least expensive, but often only one unit can be installed. Electricity is often readily available in most locations.

7. Safety: Tankless water heaters have a lower risk of scalding, which is a major hazard with conventional tank water heaters. Tankless water heaters also eliminate the risk of explosion and the damage that can cause.


Tankless Gas Water Heaters FAQs

1. What are the benefits of a tankless gas water heater?

Some benefits of a tankless gas water heater include an endless supply of hot water, energy savings, and a smaller footprint.

2. How does a tankless gas water heater work?

A tankless gas water heater works by heating water as it passes through a series of coils. The coils are heated by a gas burner, and the water is then delivered to the faucets and fixtures in the home.

3. Are tankless gas water heaters more energy efficient than traditional heaters?

Yes, tankless gas water heaters are more energy efficient than traditional heaters. They use less energy because they heat water on demand and do not have to keep a tank of water hot at all times.

4. What are the disadvantages of a tankless gas water heater?

1. They are expensive.2. They require a lot of maintenance.3. They can be difficult to install.4. They can be difficult to operate.

5. How much does a tankless gas water heater cost?

The average tankless gas water heater costs between $1,000 and $3,000.


Conclusion

There are many great tankless gas water heaters on the market. Our list of the best tankless gas water heaters will help you save time researching and choosing the best one for you.

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  • Best 75 Gallon Gas Water Heaters 2023
  • Best Natural Gas Garage Heater 2023
  • Best Gas Water Heaters 2023

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