Rinnai Vs. Navien Tankless Water Heater

Are you looking for a tankless water heater but quite not sure what to choose?

Maybe you’re asking yourself right now, “Should I go with Rinnai Tankless Water Heater? Do I need to consider Navien Tankless Water Heater?”

Rinnai and Navien are two of the most reliable and well-known brands when it comes to tankless water heaters. They are famous for quality, efficiency and available features. But in the battle between Rinnai vs. Navien Tankless Water Heater, which one would be the best for you and your family?

Keep on reading below to find out the answer.

About the Brands

Rinnai Corporation is a Japanese multinational company based in Nagoya, Japan which is driven by the passion of constant improvement to create incredibly innovative products, not only for home use but for commercial as well ever since it was co-founded in the year 1918.


In addition to their energy-efficient tankless water heaters, they are also known for manufacturing home heating appliances, gas clothes dryers, kitchen appliances and commercial-use equipment like fryers, grillers, and cookers. In fact, Rinnai is the biggest manufacturer of gas kitchen appliances in Japan.

Navien, on the other hand, may still be new in the game but it has become one of the fastest-growing companies in the home comfort sector in North America ever since it was founded in the year 2006. This brand is now a leader in condensing technology that manufactures high-efficiency tankless water heaters as well as combi-boilers and boilers that are the best choice in giving your home the ultimate comfort.


Rinnai Vs. Navien Tankless Water Heater: The Difference

So you’re probably more puzzled right now thinking what the exact differences between Rinnai and Navien Tankless Water Heaters, especially that both are leading brands in producing natural gas and propane tankless water heaters.

Now, let me help you compare these two brands to make sure you will be able to make a well-informed buying decision.

1. Size

Both Rinnai and Navien Tankless Water Heaters come with the same average size. These are the middle size-types that weighs about 90 pounds. Navien Tankless Water Heaters feature white as its main color. I like that it looks simple and will even fit almost all decoration styles.

Meanwhile, Rinnai Tankless Water Heaters usually comes with dark grey colors and looks more modern.

2. Flow Rate

Navien designed their tankless water heaters with a high average flow rate that can reach up to eight or nine gallons per minute. Some units even feature 11 gallons per minute which meet the ideal demand for commercial use.

Rinnai Tankless Water Heaters also come with a huge flow rate that can reach about 9.5 gallons per minute. So if you’re looking for something with a large flow rate or a tankless water heater with large capacity, you don’t have to worry as both brands can be the best choice.

3. Energy Efficiency

Navien Tankless Water Heaters are known for being energy efficient for a reason. Its thermal efficiency can actually reach up to 0.95.

High-end units of Rinnai tankless water heaters, on the other hand, can also reach about 0.92. However, its other series only has an average thermal efficiency of only 0.82.

4. Price

The only downside of Rinnai and Navien Tankless Water Heaters is that they charge high. But I must say the price is totally worth it if you will consider the products’ quality and performance. But if you’re quite tight on the budget and only need a smaller flow rate of tankless water heater, then you might want to check out other brands instead.

5. Warranty

When it comes to warranty, Navien is surely a winner as it gives its customer 15 years of warranty while Rinnai only provides 5 years warranty on the heater’s parts.

Final Thought

Well, I hope this review between Rinnai vs. Navien Tankless Water Heater will help you narrow down the type of water heater you’re looking for or even leads you to a model that will suit your specific needs.

If you still have any more questions, feel free to leave them at the comment section below and I’ll get back to you as soon as I can.