10 Best gas tankless water heaters of 2025

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Rinnai
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU
Main highlights

Versatile Installation
Install indoors or outdoors with Smart Sense gas control.

Ideal for Large Households
Supports up to 7 fixtures simultaneously with 11.1 GPM.

Endless Hot Water
Customers praise its ability to provide continuous hot water.
9.9

Exceptional

Our Rating

8.0
Easy installation

8.0
Temperature control
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Value for Money

2

Rheem
Rheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 7.0 GPM
Main highlights

Continuous Hot Water
Provides enough hot water for your entire house, even with multiple applications like a shower and dishwasher.

Ideal for Large Households
Perfect for families needing simultaneous hot water access without interruption.

Energy Efficiency Praised
High efficiency only runs when needed, saving energy and costs.
9.8

Exceptional

Our Rating

8.0
Temperature control

8.0
Tech Support

8.0
Easy installation
3

Ranein
Ranein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater
Main highlights

On-Demand Hot Water
Enjoy unlimited hot water instantly without preheating wait time.

Multi-Point Use
Ideal for households needing hot water in bathroom, kitchen, bar.

Energy Efficiency Praised
Customers love its energy-saving design with included exhaust pipe.
9.7

Exceptional

Our Rating
4

forimo
Tankless Water Heater Natural Gas,4.74GPM 18L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection (Black)
Main highlights

Instant Hot Water Supply
Provides 4.74 gallons per minute with steady temperature control.

Versatile Indoor Use
Ideal for homes, small cabins, and remote apartments.

Highly Rated Performance
Customers praise its instant heating and reliability.
9.4

Excellent

Our Rating

9.7
Easy installation

8.9
worth the money

8.9
Temperature control
5

Rinnai
Rinnai RUCS65IN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation
Main highlights

Unlimited Hot Water Flow
Enjoy endless hot water with a compact, durable design.

Ideal for Multiple Appliances
Serves up to 5 appliances simultaneously with 6.5 GPM flow.

Ease of Maintenance
Easy part replacement and maintenance praised by customers.
9.1

Excellent

Our Rating

9.3
Efficient Energy Use

8.7
worth the money

8.0
Temperature control
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6

Rinnai
Rinnai V75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation

21% Off
Main highlights

Key Features
Unlimited hot water with up to 7.5 GPM flow rate, energy and space-efficient design, enhanced scale detection for durability.

Ideal Use Cases
Perfect for homes with high hot water demand, serving up to 5 appliances simultaneously without compromising water pressure.

Customer Praise
Most reviews highlight the heater`s reliability, consistent hot water delivery, and energy savings as top benefits.
9.0

Excellent

Our Rating

8.7
Temperature control

8.7
Tech Support

8.7
Remote Control
7

Orbek
Natural Gas Tankless Water Heater - ORBEK 100,000 BTU Up to 4.3 GPM Indoor Installation - CSA Certified On-Demand Instant Hot Water Heater 3/4" NPT Connector Size
Main highlights

Continuous Hot Water Supply
Tankless design ensures uninterrupted hot water on demand, eliminating wait times and energy wastage.

Space-Saving Solution
Ideal for small homes or off-grid situations, maximizing space efficiency.

Highly Praised Safety Features
Customers appreciate its anti-scalding and leak protection, enhancing user confidence.
8.8

Very Good

Our Rating

8.2
Tech Support

8.0
Easy installation

8.0
worth the money
8

Virego
18L Tankless Water Heater Natural Gas,68000 BTU Indoor Instant Hot Natural Gas Water Heater 4.74GPM,110V/120V 60HZ 3.6kW Constant Natural Water Heater with Fahrenheit Digital Display

16% Off
Main highlights

High Efficiency Performance
Delivers 4.74 gallons per minute with 68,000 BTU output, ensuring instant hot water with minimal gas consumption.

Versatile Use Cases
Perfect for home, RV, camping, and pet bathing, offering flexibility and convenience.

Customer Satisfaction
Praised for reliability and performance, achieving a 5-star rating from customers.
8.7

Very Good

Our Rating
9

GASLAND

Natural Gas Tankless Water Heater, GASLAND CE686NG Up to 7.6 GPM 199000 BTU Indoor Installation Instant Residential Natural Gas On-demand Tankless Hot Water Heater
8.6

Very Good

Our Rating
10

FOGATTI
FOGATTI Natural Gas Tankless Water Heater - Outdoor Installation Up to 8.1 GPM, Gray Instant Hot Water Heater - Instagas Comfort 180S Series
Main highlights

Unlimited Hot Water
The tankless design offers endless hot water without preheating.

Whole Family Use
Ideal for homes with 3-5 outlets, ensuring ample supply.

Excellent Customer Service
Praised for quick, effective support and problem resolution.
8.5

Good

Our Rating

8.4
Temperature control

8.2
Easy installation

8.0
Tech Support

10 Best gas tankless water heaters of 2025

1

NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 11.1 GPM, 199,000 BTU

8.0

8.0

How do we rank?

How do we rank?

Analyzing top stores

2

Rheem RTG-70DVLN-3 High Efficiency Non-Condensing Indoor Tankless Natural Gas Water Heater, 7.0 GPM

8.0

8.0

8.0

3

Ranein Natural Gas Tankless Water Heater, Indoor Max 3.6 GPM, 80,000 BTU Instant Hot Water Heater

4

Tankless Water Heater Natural Gas,4.74GPM 18L Indoor,Instant Hot Gas Water Heater,Constant Natural Water Heater with Fahrenheit Digital Display,Multi-Protection (Black)

9.7

8.9

8.9

5

Rinnai RUCS65IN Tankless Hot Water Heater, 6.5 GPM, Natural Gas, Indoor Installation

9.3

8.7

8.0

6

Rinnai V75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation

8.7

8.7

8.7

7

Natural Gas Tankless Water Heater - ORBEK 100,000 BTU Up to 4.3 GPM Indoor Installation - CSA Certified On-Demand Instant Hot Water Heater 3/4" NPT Connector Size

8.2

8.0

8.0

8

18L Tankless Water Heater Natural Gas,68000 BTU Indoor Instant Hot Natural Gas Water Heater 4.74GPM,110V/120V 60HZ 3.6kW Constant Natural Water Heater with Fahrenheit Digital Display

9

Natural Gas Tankless Water Heater, GASLAND CE686NG Up to 7.6 GPM 199000 BTU Indoor Installation Instant Residential Natural Gas On-demand Tankless Hot Water Heater

10

FOGATTI Natural Gas Tankless Water Heater - Outdoor Installation Up to 8.1 GPM, Gray Instant Hot Water Heater - Instagas Comfort 180S Series

8.4

8.2

8.0

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