Rinnai RL94iN Review – Natural Gas Tankless Water Heater

on demand water heater natural gas

You must have seen the heavy water heater tanks in the bathrooms that take ages to heat the water. We guess you are looking for a compact water heater that not only occupies less space but also works. Your search for the perfect water heater ends here. As we go through the Rinnai RL94iN review, you will see the action unfolding itself. Brace up for the action to follow.

This product saves space while delivering top quality performance all the time. On the energy savings front too, this water heater has set an example for others to follow.

In this review, we will take a closer look at Rinnai RL94iN’s features, and how it compares to be a better option than the traditionally used storage-water water heaters that are usually more expensive, consume more energy, and occupy more space. We will also look at the customer reviews and the pros and cons of the Rinnai RL94iN.

Rinnai RL94iN Tankless Water Heater Review

Rinnai RL94iN Natural Gas Tankless Water Heater comes with the following features:
Rinnai RL94iN Review
1. Tankless Water heater: This is obviously the most attractive of all the features of this water heater. The absence of any water tank means that you can get instant hot water straight out of the tap continuously. You need not wait for the water to heat again after exhausting the tank. This is very useful especially during the freezing winters, where you could get a continuous stream of hot water all the time.

2. Temperature lock system: This beautiful feature can help in safeguarding the product from a sudden increase in the water temperature due to heating. You can lock the temperature at a pre-set value thereby ensuring that the water does not heat beyond that temperature. This feature also enables that nobody can make unauthorized changes to the temperature settings.

3. Tremendous heating capacity: The water heater is capable of delivering 9.4 gallons of hot water a minute, making it equal to a natural hot water spring in many respects. This is a mind-blowing feature of this water heater. People can check out the Rinnai RL94iN review for confirmation of this stupendous feature.

4. The flexibility of use: The product is an extremely flexible one. You would be able to supply continuous hot water at a preset temperature for up to five different appliance outlets at a time. This entails that five families can easily use this supply of continuous hot water at a time without experiencing any fluctuation in temperature.

5. Energy savings: This is an outstanding feature of this product. You can save up to 40% of energy as it has the capacity to deliver a whopping 9.4 gallons of hot water in one minute. This energy saving feature distinguishes this water heater from the rest in the field.

6. Space savings: This is a tankless water heater. Hence, it does not occupy any space at all. You would be able to mount it on the wall. The hot water directly flows out of the water heater and is enough to satisfy five outlets at a single time.

7. Perfect Insulation: The product comes with enhanced insulation thereby making the water heater safe for use in mobile homes too.

8. Enhanced Scale detection: This water heater has an enhanced scale detection sensor whereby you can expect a longer lifeline for your water heater. This sensor reduces the possibility of long-term damage to the product.

9. Warranty: The product comes with a 5-year warranty on the parts with a 12-year warranty on the heat exchanger. In the case of labor installations in residential colonies, you get a 1-year warranty.

Pros & Cons


  • Being a tankless water heater, it saves space.
  • Instant heating capacity capable of delivering 9.4 gallons per minute.
  • Environmentally friendly being able to save up to 40% on electricity.
  • A thermal efficiency factor of 83%, one of the highest in the industry.
  • The automatic temperature control feature prevents untoward accidents.
  • The enhanced scale detection features ensure a longer life for the water heater.
  • You can deliver hot water to five different outlets at a single time.
  • The chrome finish makes it an attractive one by all means.
  • You would be able to preset the temperature thereby ensuring uniform hot water throughout.
  • This is a compact unit in all respects.


  • People complain of slow water heating capacity. These could be isolated cases.
  • Some people have complained about poor customer service. Rinnai is actually very prompt in service. This may be a single case as reported by the customer.

Customer Reviews

This is a good product with an average customer rating of 4.2 stars out of five. Many customers appreciated the fact that the water heater does not occupy space and still delivers quality heating at the same time. They have also appreciated the energy savings because of using this water heater. The scale detection feature has also garnered many positive reviews.

Final Verdict

Space wise, this product ranks among the best in the business. Energy saving wise, no other water heater can come near this one. You have to go through the various Rinnai RL94iN review to understand that this product is an outstanding one capable of holding its own among the other tankless water heaters in the market.


Weight: 44.3 Pounds

Dimensions: 14"x10"x 23"

Type: Propane and Natural Gas

12 Year Heat Exchanger warranty 

 Voltage: 120 volts 

Included Components: Valve Kit

Certification: Energy Star


9.4 GPM

save up to 40% of energy 

The flexibility of use

Tremendous heating capacity

Temperature lock system

Tankless Water heater

Enhanced Scale detection

Pros and Cons

Space savings & Compact Size

Perfect Insulation

Some complaint slow water heating

Environmentally friendly

83% thermal efficiency factor 

deliver to five different outlets at a single time.

Poor customer service by some


Feel free to contact us if you need assistance. We are just here to help you.