Rinnai Vs. Navien Tankless Water Heaters By Consumer Reports

Tankless water heaters are one of the essential home appliances you should have. This type of water heater really comes overly efficient, and it is obvious that lots of people are falling in love with them already.

Over the years, the sales of tankless water heaters have increased, and this has brought about an increase in production too. Today, there are different companies in the production of tankless water heaters. Two of those companies are Rinnai and Navien.

Rinnai and Navien are brands that people have come to love. These two companies are leading the water heater market because of the unique, high-quality tankless water heaters they produce. With the way people are rooting for these two brands, purchasing a tankless water heater becomes challenging as you might get confused about which brand to select.

No need to worry much, this article is just for you. It will adequately inform you about these two brands and guide you on which to select.

Rinnai Tankless Water Heater

In the 1920s, a Japanese named Hidejiro Naito, established a multinational company in Nagoya, Japan. This multinational company is Rinnai, and it is popularly known for producing kitchen appliances, heating appliances, rice cooker, flyers, home heating appliances and much more equipment that run on gas, including tankless water heaters.

Today, Rinnai is one of the leading companies that manufacture water heaters. Rinnai tankless water heaters are unique and modernized. They work productively and are very efficient, which is why quite a number of people opt for them. These brands of water heaters support natural gas or propane fuel types. They can be used either indoors or outdoors and are easy to install.

Rinnai is also widely-known for producing tankless water heaters using advanced technology. When talking about advanced technology, let me give you a hint: Rinnai’s water heaters are equipped with Wi-Fi and remote controls that offer you the luxury of controlling the unit from anywhere in the house. Isn’t that fantastic?

Navien Tankless Water Heater

Navien has also been in existence for quite some while now. This company is an old company but not as old as Rinnai. In 1978, KyungDong Navien found the Navien company in South Korea. The company launched into operation, and after ten years, it became the first Asia-based company to develop a highly-effective condensing boiler.

Navien tankless water heaters are environmentally friendly. They reduce the water bill and provide an on-demand water heater as soon as you call for it. They have easy-to-use controls. They are also affordable and require less maintenance.

Navien tankless water heaters are very effective and durable. Compared with other water heaters, these ones can generate about 10 gallons of hot water per minute, really super-efficient, right?

Having had an idea of what these two brands are, let’s take a look at some comparisons between the two:

Rinnai Vs. Navien Tankless Water Heaters

Installation Processes

In the aspect of installation, both brands are easy to install because of their simple designs. Navien offers a one-person mounting and bracket installation system while Rinnai offers venting options that make installation hassle-free.


It is a bit challenging having to tell which brand has more efficient tankless water heaters. Both are very efficient.

Rinnai’s models have an efficiency rating of 82% to 98%. The models have capacities of 120,000 to 119,000 BTUs. Their 199,000 BTU model can supply water to 4 showers simultaneously. Their products also allow you to enjoy close to 40% savings on energy costs.

Navien’s products are, however, more environmentally friendly as they totally reduce your water bill. Navien tankless water heaters produce more than 10 gallons of water per minute, which is more than what a Rinnai water heater can generate. The efficiency level of Navien products is rated 97%. They use a highly-effective heating system termed “condensing.”


If you are so bothered about limited space and you need a portable tankless water heater, you can always trust Rinnai for this. Rinnai has products that save space compared to Navien.


For home appliances as expensive as tankless water heaters, the warranty is very much important.

Navien has a 15 years warranty on their heat exchangers while other parts are warrantied for five years. Rinnai has a five years warranty covering all the parts of their models, save the heat exchangers which are warrantied for 10 to 12 years.