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10 Best Gas Water Heaters 2026 in the United States

#1

Winner

10.0 score

NEW Rinnai RXP199iN Smart Sense Condensing Tankless Water Heater, 199,000 BTU, Up to 11.1 GPM, Natural Gas or Propane, Indoor/Outdoor Installation, Built-In Recirculation Pump

NEW Rinnai RXP199iN Smart Sense Condensing Tankless Water Heater, 199,000 BTU, Up to 11.1 GPM, Natural Gas or Propane, Indoor/Outdoor Installation, Built-In Recirculation Pump

Rinnai

10.0 score

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The Rinnai RXP199iN Condensing Smart Sense Tankless Water Heater is designed for versatile installation, functioning both indoors and outdoors. Its dual compatibility with propane and natural gas (thanks to the Smart Sense gas control system) makes it a flexible choice. With a high flow rate of up to 11.1 GPM, it can handle multiple fixtures simultaneously, ensuring a continuous supply of hot water. The compact size, comparable to a small suitcase, is convenient for homes with limited space.

Rating
10.0
Chosen by1,391
Capacity
Energy Efficiency
Size and Installation

Most important from
116 reviews

Capacity
Works great for a household of 5 or more, powerful enough to use hot water at 4 places simultaneously.
Energy Efficiency
The On Demand BLE Bluetooth button accessory is highly recommended for maximizing energy efficiency.
Size and Installation
Straightforward installation with detailed instruction manual, though pre-planning is advised.
#2
9.1 score

NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU

NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU

Rinnai

9.1 score

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The Rinnai RX160iN is a versatile and compact tankless water heater that can be installed either indoors or outdoors, making it a flexible option for various home setups. It has a high energy efficiency factor of 0.97, which means it can help save on energy costs over time. The water heater offers a maximum flow rate of 9 gallons per minute (GPM), allowing it to handle multiple fixtures at once, so you shouldn't run out of hot water during peak usage times. This is ideal for larger households or those with higher hot water demands.

Rating
9.1
Capacity
Venting Type
Size and Installation

Most important from
64 reviews

Capacity
Quick to heat up and never worry about running out of hot water.
Venting Type
The exhaust fans can be noisy, especially in split-level homes.
Size and Installation
Installation might require some tweaks, such as adjusting the air-inflow.
#3
9.1 score

NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU

NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU

Rinnai

9.1 score

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The Rinnai RX130iN offers impressive versatility and convenience, making it suitable for various installation environments—both indoor and outdoor—thanks to its Versa Vent feature. It can operate on either propane or natural gas, providing flexibility depending on your fuel availability. With a flow rate of up to 7.1 GPM, it ensures you never run out of hot water, easily supporting multiple fixtures simultaneously, which is ideal for larger households or demanding applications.

Rating
9.1
Capacity
Energy Efficiency
Venting Type

Most important from
41 reviews

Capacity
Powerful enough to provide hot water at four places simultaneously, making it ideal for larger households.
Energy Efficiency
High quality build and sophisticated technology design that provides hot water efficiently and saves water due to the On Demand recirculation feature.
Venting Type
Supports both natural gas and propane, offering versatility depending on fuel availability.
Size and Installation
Installation is straightforward thanks to the detailed instruction manual, though pre-planning for mounting location and electrical service outlet is strongly advised.

Top 10 Best Gas Water Heaters 2026 in the United States

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Westinghouse

Westinghouse Smart Tankless Water Heater Natural Gas Indoor, 10.3 GPM 199,000 BTU Whole Home Instant Hot Water Heater, WiFi App & Voice Control, ±1°F Temp Stability for 4+ Bathrooms

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#1

Winner

10.0  score
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Rinnai

NEW Rinnai RXP199iN Smart Sense Condensing Tankless Water Heater, 199,000 BTU, Up to 11.1 GPM, Natural Gas or Propane, Indoor/Outdoor Installation, Built-In Recirculation Pump

Capacity: 11.1 GPM
Energy Efficiency: .98 UEF
Venting Type: Versa Vent
Size and Installation: 19"W x 31"H, Wall Mount

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Chosen by 1391 this week

Sponsored

Slide 1

Westinghouse

Westinghouse Smart Tankless Water Heater Natural Gas Indoor, 10.3 GPM 199,000 BTU Whole Home Instant Hot Water Heater, WiFi App & Voice Control, ±1°F Temp Stability for 4+ Bathrooms

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#2
9.1  score
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Rinnai

NEW Rinnai RX160iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 9 GPM, 160,000 BTU

Capacity: 9 GPM
Energy Efficiency: 0.97
Venting Type: Versa Vent
Size and Installation: 19"W x 31"H, 54 pounds

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#3
9.1  score
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Rinnai

NEW Rinnai RX130iN Condensing Smart Sense Natural Gas or Propane Tankless Water Heater, Indoor or Outdoor Water Heater, Up to 7.1 GPM, 130,000 BTU

Capacity: 7.1 GPM
Energy Efficiency: UEF of .97
Venting Type: Versa Vent
Size and Installation: 19"W x 31"H, Wall Mount

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#4
8.5  score
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Rinnai

Rinnai RE180iN Non-Condensing Natural Gas Tankless Water Heater, Up to 8.5 GPM, Indoor Installation, 180,000 BTU

Capacity: 8.5 Gallons
Energy Efficiency: 0.82
Recovery Rate: heats water on demand
Venting Type: non-condensing
Size and Installation: 14.05"W x 27.28"H, wall mount

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#5
8.2  score
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Rheem

Rheem RTGH-95DVLN-3 RTGH Series 9.5 GPM 199,900 BTU 120 Volt Residential Indoor Natural Gas Tankless Water Heater Stainless Steel

Capacity: 9.5 Gallons
Energy Efficiency: 0.93
Recovery Rate: 9.5 gallons per minute
Venting Type: Indoor natural gas venting
Size and Installation: 17.7"W x 23.7"H, Wall mount

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#6
7.9  score
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A.O. Smith

AO Smith BTR-200 Tank Type Water Heater with Commercial Natural Gas

Capacity: large, commercial use
Energy Efficiency: high efficiency
Venting Type: vent size 6
Size and Installation: 30.25"W x 72"H, floor mount

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#7
7.3  score
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Rinnai

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

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#8
7.3  score
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Rheem

Rheem RTG-70XLN-3 High Efficiency Non-Condensing Outdoor Tankless Natural Gas Water Heater, 7.0 GPM, Gray

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#9
7.0  score
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Ranein

Ranein Natural Gas Tankless Water Heater, Indoor Max 4.3 GPM, 100,000 BTU Instant Hot Water Heater

Capacity: 4.3 gallons per minute
Energy Efficiency: Oxygen-free copper tank reduces heat loss
Venting Type: Includes vent pipe
Size and Installation: 18.89"W x 8.85"H, wall-mounted

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#10
7.0  score
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Rinnai

Rinnai V53DeN Natural Gas Tankless Water Heater - 5.3 GPM, Outdoor Installation

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Buying Guide for the Best Gas Water Heaters

Choosing the right gas water heater for your home is essential to ensure you have a reliable and efficient supply of hot water. There are several key specifications to consider when selecting a gas water heater, and understanding these can help you make an informed decision that best fits your needs. Here are the main factors to consider and how to navigate them.
CapacityCapacity refers to the amount of water the heater can store and heat at one time, usually measured in gallons. This is important because it determines how much hot water is available for use at any given moment. For smaller households (1-2 people), a 30-40 gallon tank may be sufficient. Medium-sized households (3-4 people) might need a 40-50 gallon tank, while larger households (5 or more people) may require a 50+ gallon tank. Consider your household size and hot water usage patterns when choosing the capacity.
Energy EfficiencyEnergy efficiency indicates how effectively the water heater converts gas into hot water, often represented by the Energy Factor (EF) rating. A higher EF rating means better efficiency and lower energy costs. Standard models typically have an EF rating around 0.6-0.7, while high-efficiency models can have ratings of 0.8 or higher. If you are looking to save on energy bills and reduce your environmental impact, opt for a model with a higher EF rating.
Recovery RateThe recovery rate measures how quickly the water heater can heat a new batch of water after the initial supply has been depleted, usually in gallons per hour (GPH). This is crucial for households with high hot water demand. A higher recovery rate means the heater can provide more hot water in a shorter period. For homes with frequent hot water usage, such as multiple showers or laundry loads, a higher recovery rate (50-60 GPH) is beneficial. For less frequent use, a lower recovery rate (30-40 GPH) may suffice.
Venting TypeGas water heaters require proper venting to expel combustion gases safely. There are two main types: atmospheric venting and power venting. Atmospheric venting uses the natural rise of hot air to expel gases through a vertical vent, while power venting uses a fan to push gases out through a horizontal or vertical vent. Atmospheric venting is simpler and less expensive but requires a vertical vent path. Power venting offers more installation flexibility and is suitable for homes without a vertical vent path. Choose based on your home's venting setup and installation preferences.
First Hour Rating (FHR)The First Hour Rating (FHR) indicates the amount of hot water the heater can supply in the first hour of use, combining the tank capacity and recovery rate. This is important for understanding the heater's performance during peak usage times. For example, if your household uses a lot of hot water in the morning, a higher FHR (70-100 gallons) ensures you won't run out. For moderate usage, an FHR of 50-70 gallons may be adequate. Assess your peak hot water needs to determine the appropriate FHR.
Size and InstallationThe physical size of the water heater and the installation requirements are important to ensure it fits in the designated space and can be installed properly. Measure the space where you plan to install the heater and compare it with the dimensions of the models you are considering. Additionally, consider the installation complexity and whether you need professional help. Compact models are ideal for smaller spaces, while larger models may require more room and professional installation.

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