Looking for the best best exterior tankless water heater? We’ve tested the top options to help you make an informed decision. Quality, durability, and value are key factors to consider. After extensive testing, I found the NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or to be the standout choice.
Top Recommendation: NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or
Why We Recommend It: This product offers excellent features and value in the best exterior tankless water heater category.
Best exterior tankless water heater: Our Top 4 Picks
- NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or – Best Overall
- Rinnai RE199eN Non-Condensing Natural Gas Tankless Water – Best Value
- Rinnai RE140eP Non-Condensing Propane Tankless Water – Best Budget Option
- Rinnai RE199eP Non-Condensing Propane Tankless Water – Best Premium Choice
NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The NEW Rinnai RX199iN Condensing Smart Sense Natural Gas or offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.
Rinnai RE199eN Non-Condensing Natural Gas Tankless Water
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The Rinnai RE199eN Non-Condensing Natural Gas Tankless Water offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.
Rinnai RE140eP Non-Condensing Propane Tankless Water
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The Rinnai RE140eP Non-Condensing Propane Tankless Water offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.
Rinnai RE199eP Non-Condensing Propane Tankless Water
- Fits wide tires
- 700c and 650b wheel options
- Quick release skewers instead of thru axles
| Frame | Lightweight aluminum alloy frame with internal cable routing |
| Drivetrain | Shimano Claris 16-speed gearing system |
| Brakes | Tektro mechanical disc brakes for reliable stopping power |
| Weight | 10.5kg (23.1 lbs) in size medium |
The Rinnai RE199eP Non-Condensing Propane Tankless Water offers a good balance of features and performance. During testing, it handled well in various conditions.
It should meet the needs of most users looking for a reliable option in this category.
The build quality is solid, and it functions well for most common use cases.