4 Best Navien Tankless Water Heater Reviews in 2020 [Updated]


Navien Tankless Water Heater ReviewsKD Navien or Kyung Dong Navien was established back in 1978. Ten years later, Navien Company became the first Asian manufacturer and developer of efficient and eco-friendly condensing boilers.

At the moment, KD Navien has managed to gain a worldwide reputation for pioneering in the water heating industry. Their products are efficient, reduces carbon dioxide and they also cut down on the energy costs. This is a post where we are going to discuss the best Best Navien Tankless Water Heaters.

Started as a Korea-based boiler company in 1978, KD Navien has gained immense popularity in the electronics market. In a span of mere 10 years, KD Navien became the first electronics brand to manufacture eco-friendly condensing boilers. Today, it has made a mark in all major international markets and is continuously expanding its business in other regions of the world as well.

KD Navien electric water heaters are known for their efficiency, low carbon dioxide emission, and controlled energy costs. If you are looking for a trustworthy tankless water heater that takes care of you and the environment alike, look no further than KD Navien because its dedication towards environment safety is unmatchable. Therefore, today we are going to explore the best Navien Tankless Water Heaters so that you don’t have to struggle while deciding.

Navien managed to expand its operations to the United States and Canada in 2006. The company has gone forward to become one of the most reputable producers of several home comfort products including tankless water heaters. Here are the Navien tankless water heater reviews for your better understanding which tankless water heaters are best.

Why Should You Choose Navien Tankless Water Heater?

whyNavien’s Tankless Water Heaters are available for both commercial and residential use. Unlike the traditional tank-type water heaters, Navien tankless water heaters usually provide an endless supply of the hot water at any time you require it.

Therefore, what actually sets the Navien tankless water heaters apart from the other water heater products?

Navien normally specializes in producing condensing tankless heaters and the condensing technology has given their units unparalleled efficiency. As a matter of fact, Navien’s tankless heaters boast of an average efficiency factor of 0.98. This is a great improvement from the traditional tank-type heaters that only had an energy factor of 0.55.

Meanwhile, average tankless water heaters have an efficiency grade of 0.82. Although there are still other brands that are presently manufacturing condensing water heaters, their average energy efficiency only reaches 0.95 which is clearly way below the Navien’s efficiency grade.

For average homeowners, such superior thermal efficiency usually translates to low costs when it comes to energy bills.

Apart from its revolutionary condensing technologies, the Navien water heaters are also equipped with the ECO Premixed Burners that dramatically cuts down the heater’s CO and NOx emissions by as much as 75 percent. The Eco Burner Technology normally makes the Navien water heaters to be among the most environmentally friendly heaters on the market today.

The Comfort Flow Technology is also another feature which gives Navien tankless heaters an edge over other tankless water heaters in the market. Most tankless water heaters usually have the “cold water sandwich problems”, where the supply of the hot water flows inconsistently thus resulting in short bursts of the cold water in between the flow of hot water. With Navien’s buffer tank and recirculation pump, the cold water sandwich phenomenon doesn’t become a problem anymore.

Top 4 Best Navien Tankless Water Heater Reviews

4 Best Navien tankless Water Heater ReviewsNavien offers a wide range of products and has something for almost everyone. Their major draws are definitely their gas tankless water heaters, condensing gas boilers, gas combi boilers, accessories as well as replacement parts.

Navien water heaters normally come in 2 major varieties: commercial and residential water heaters. Both of them work efficiently and it just boils down to the personal preferences, needs as well as intended use to choose the best Navien water heater. Below is the Navien tankless water heater reviews for their top models:

1. Navien NPE-240A Condensing Tankless Gas Water Heater Review

Navien NPE-240A ReviewNavien has always been pushing the boundaries of the hot water heater’s efficiency for over 25 years. The NPE-240A water heater is a result of their great dedication to provide a green and effective water heating unit. Navien NPE-240A model utilizes condensing technology that captures the additional heat lost by the other typical water heaters.

Its energy factor is quite superior to both noncondensing tankless models and traditional water heaters. The reduced vent temperatures as a result of this condensing technology allow homeowners to use PVC venting.

Pros & Cons


  • Two stainless steel heat exchangers
  • Ultra condensing efficiency
  • Low NOx emissions


  • Some customers have complained that this heater is a bit expensive. But in my opinion, it is worth spending the extra money and has a great product rather than replacing it twice.

It saves money and also contributes to the ease of installing the device. The Navien NPE-240A tankless water heater also has excellent technology that reduces carbon footprint and heating costs.

2. Navien NPE-240A Tankless Gas Water Heater

Navien NPE-240A ReviewNavien’s next-generation condensing water heater technology is specially designed to simplify the installation process while offering the best hot water experiences.

Navien NPE-240A tankless water heater eliminates all the obstacles of the past tankless heaters thus making it a perfect solution for the tank replacements.

Pros & Cons


  • Buffer tank
  • Utilizes existing gas line
  • Easy to use
  • Heat Exchanger


  • This product is a bit heavy, weighing 92 pounds. No others found yet.

The simple retrofit, ultra-high condensing efficiencies, exclusive ComfortFlow technology, and field gas convertibility all combine well to make this new NPE series water heater one of the best choices in tankless water heaters.

3. Navien NPE-210A Premium Condensing Tankless Gas Water Heater

Navien NPE-210A Premium Condensing Tankless Gas Water Heater ReviewThe Navien NPE-210A Condensing Tankless Gas Water Heaters is capable of providing an installation with endless supplies of hot water. This tankless water heater provides hot water when the demand arises. The NPE-210A achieves this by activating the heater the moment you open your hot water tap thus supplying you with an uninterrupted supply of the hot water.

Unlike the conventional tank-type heaters which can ultimately run out of hot water after taking multiple draws from the tank, the Navien NPE-210A Condensing Tankless water heater will assure you a continuous supply of hot water.

Pros & Cons


  • Field Convertible
  • 10.1 GPM
  • Indoor and Outdoor Installation


  • This heater is also a bit heavy, weighing 90 pounds. Other than that, it is a great product.

The Navien Condensing tankless water heater will only provide hot water when required. The NPE has been designed to provide a continuous supply of hot water thus you don’t have to worry about ever running out of hot water regardless of the number of hot water draws that your installation might have in a row.

4. Navien NPE240S-NG Premium Condensing Natural Gas Tankless Water Heater

Navien NPE240S-NG Premium Condensing Natural Gas Tankless Water Heater ReviewThe Navien NPE240S-NG tankless heater is geared for the residential users. This heater is made of heavy-duty stainless steel heat exchangers with the fin-type design for maximum efficiency. Its condensing heat exchanger allows for increased thermal efficiency by up to 98 percent.

Pros & Cons


  • Intelligent preheating technology
  • Wall-hung installation
  • Low NOx emissions
  • 11.1 GPM


  • Since it runs on natural gas, it is not suitable for those homes where there is no gas supply.

Navien also offers a 10 years warranty on this model. Therefore, this will enable you to get a lot out of every dollar that you spend on energy.


Navien is among the best brands for tankless water heater in the world today. It has always been among the leading companies in the manufacture of water heating equipment for several years.

Currently, they are manufactured for energy-saving, efficient and CO2 reducing water heaters in the world. Since the introduction of their water heaters in 1978, they have since flourished in the industry for a long time. The company is widely viewed as a solid manufacturer in this industry. In fact, it is mostly referred to as the “Cadillac” of hot water communities. Navien was the first Asian company to manufacture highly efficient and environmentally-friendly water heaters.

Despite having made a name for themselves in most parts of Asia, Navien has already found major success in the US, Europe, Canada and in several countries worldwide. After expanding its operations around 10 years ago, the company has quickly become one of the fastest-growing and most reputable companies within the home comfort sector.

Best Navien Tankless Water Heater Comparison Chart


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43.9 x 33.5 x 69.6 cm

37.2 Kg

Field convertible

Low NOx emissions

Two heat exchangers


15 years Warranty


92 pounds

199900 BTU per hour

Heat Exchanger

Intelligent preheating

Buffer Tank

Utilizes Existing gas Line

Easy to Use

10.1 GPM

19,900 - 180,000 BTU/H

0.96 Engery Efficiency

90 pounds


Field Convertible

82 lbs


82 lbs


19,900 - 199,900 BTU/H

0.96 Energy Efficiency 

Low NOx emissions

Wall-hung installation


They pride themselves on providing high quality condensing tankless water heaters as shown in the Navien tankless water heater reviews. With Navien tankless water heater, you can be assured of getting value for all the money spent.