8 Best rinnai tankless hot waters of 2025

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1

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

Unlimited Hot Water Flow
Provides endless hot water with a flow rate of 11 GPM.

Ideal for Large Households
Perfect for homes needing simultaneous hot water for multiple appliances.

Highly Praised Efficiency
Customers love the efficient and quiet operation with minimal delays.
Key specs
- maximum flow rate:11 GPM
- special features:Endless Hot Water
- voltage:120 Volts
- wattage:N/A
- maximum temperature:N/A
9.7

Exceptional

Our Rating

9.5
Long life

9.1
Temperature control

9.1
Comfort
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Value for Money

2

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.
Key specs
- maximum flow rate:11.1 GPM
- special features:Indoor/outdoor install
- voltage:N/A
- wattage:N/A
- maximum temperature:N/A
9.6

Exceptional

Our Rating

8.0
Easy installation

8.0
Temperature control
3

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

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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.
Key specs
- maximum flow rate:7.5 Gallons Per Minute
- special features:Energy Factor of .82
- voltage:120 Volts
- wattage:N/A
- maximum temperature:140 F
9.5

Excellent

Our Rating

8.7
Temperature control

8.7
Tech Support

8.7
Remote Control
4

Rinnai
Rinnai RL75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation
Main highlights

Compact and Powerful Design
The Rinnai RL75IN delivers up to 7.5 GPM, providing endless hot water in a compact size suitable for various spaces.

Ideal for Multi-Fixture Use
Perfect for homes needing simultaneous hot water for multiple showers, laundry, and dishwashing with its high flow rate.

Highly Reliable Performance
Customers praise its reliability and efficiency, noting significant energy savings and consistent hot water supply.
9.4

Excellent

Our Rating

8.7
lasts a long time

8.7
Tech Support

8.4
worth the money
5

JUWO
JUWO 3/4 Inch IPS Isolator Tankless Water Heater Service Valve Kit, with Pressure Relief Valve, Hot Cold Water Supply Isolator Valves fit for Rheem, Rinnai, Navien
Main highlights

Key Features
Easy-install, lead-free brass valves with color-coded handles for hot & cold lines, including pressure relief for safety. Fits major tankless heater brands.

Ideal Use Cases
Perfect for homeowners needing straightforward maintenance, cleaning, and flushing of tankless water heaters without system shutdown.

Customer Reviews
Highly praised for the quality material and ease of installation, enhancing the overall maintenance experience of tankless water heaters.
Key specs
- size:10.9 x 18.9 x 24.6 inches
- color:Brass Red Blue
- material:Brass
- wattage:N/A
- power source:N/A
9.3

Excellent

Our Rating

9.9
Easy installation

9.9
worth the money

9.9
Simple to use
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6

Rinnai
Rinnai RE140iN Non-Condensing Natural Gas Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU
Main highlights

Energy Efficient Design
The Rinnai RE140iN only heats water when necessary, conserving energy and reducing costs.

Ideal for Multi-Fixture Use
Provides up to 5.3 GPM, perfect for homes needing simultaneous hot water supply.

Praised for Efficiency
Customers appreciate its improved efficiency over older models, enhancing performance and satisfaction.
Key specs
- maximum flow rate:5.3 GPM
- special features:LED Display
- voltage:N/A
- wattage:140000 watts
- maximum temperature:N/A
9.2

Excellent

Our Rating

9.1
Easy installation

8.9
Temperature control

8.0
Tech Support
7

Rinnai
Rinnai CU160iP Commercial Propane Condensing Tankless Water Heater, Indoor Installation, 9 GPM
Main highlights

Key Features
Energy-efficient, space-saving design, 9 GPM flow rate, Circ-Logic technology for smart heating, Wi-Fi enabled for on-demand hot water.

Ideal Use Cases
Perfect for businesses needing constant, powerful hot water flow. Offers flexible installation for various spaces and commercial settings.

Customer Reviews
Highly praised for its reliability and efficiency. Users appreciate the significant energy savings and consistent hot water supply.
Key specs
- maximum flow rate:9 GPM
- special features:Circ-Logic technology
- voltage:120 Volts
- wattage:N/A
- maximum temperature:N/A
9.0

Excellent

Our Rating

8.2
Tech Support

8.0
Temperature control

8.0
Easy installation
8

Chromex
Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump
Main highlights

Key Features
Comprehensive kit includes 5-gallon bucket, 1/6 HP pump, hoses, descaler solution, and pump grate; safe for various materials and systems.

Ideal Use Cases
Perfect for owners of Rinnai, Bosch, Noritz, and other tankless water heaters looking to improve efficiency and extend lifespan with easy maintenance.

Customer Praise
Most reviews highlight the ease of use and effectiveness of the cleaning solution, appreciating the straightforward instructions and quick cleaning process.
8.8

Very Good

Our Rating

9.9
Easy installation

9.9
Simple to use

9.7
Instruction

8 Best rinnai tankless hot waters of 2025

1

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

9.5

9.1

9.1

How do we rank?

How do we rank?

Analyzing top stores

2

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

3

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

8.7

8.7

8.7

4

Rinnai RL75IN Tankless Hot Water Heater, 7.5 GPM, Natural Gas, Indoor Installation

8.7

8.7

8.4

5

JUWO 3/4 Inch IPS Isolator Tankless Water Heater Service Valve Kit, with Pressure Relief Valve, Hot Cold Water Supply Isolator Valves fit for Rheem, Rinnai, Navien

9.9

9.9

9.9

6

Rinnai RE140iN Non-Condensing Natural Gas Tankless Water Heater, Up to 5.3 GPM, Indoor Installation, 140,000 BTU

9.1

8.9

8.0

7

Rinnai CU160iP Commercial Propane Condensing Tankless Water Heater, Indoor Installation, 9 GPM

8.2

8.0

8.0

8

Chromex Tankless Water Heater Flush Kit with Certified Liquid Descaling Solution and 1/6HP Extra Strength Pump

9.9

9.9

9.7

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