Buying Guide

Navien NPE-240A Premium Condensing Tankless Gas Water heater review

Tankless water heaters were not quite famous once upon a time. There still were tiny mishaps in their functioning which causes short but cold bursts of water to fall. But over time tankless heaters have become a household favourite, especially for those who are crunched for space. This kind of heaters come with a lot of attractive features and Navien NPE-240A Premium Condensing Tankless Gas Water heater does too. But the question is, what are these features, and is this model from Navien a trustworthy and useful one? If that’s what you are thinking of as well then let’s find out about it:


  • Flow rate

This tankless heater is a very powerful one and has a huge flow rate which is over 12 gallons every minute. It comes with a flow rate of around 11 GP at a full 45 degrees of temperature rise. If you prefer 35 degrees then you will get 12 GPM. So it can be comfortably used by mid-sized families. It can supply hot water to multiple showers at the same time. It can supply water to seven bathrooms and all sinks. This will certainly ensure that you are comfortable during the winters and don’t face any issues in completing your everyday chores. If this feature was impressive to you then what will make the model even more attractive to you is the fact that it can supply hot water instantly. There will be no lag.

  • Advanced technology

Navien makes use of a preheating technology that keeps track of your regular hot water usage patterns. Along with this, the tech ensures that it heats the water before supplying it right to the necessary fixtures. This ensures that the unit energy remains efficient and you get the hot water you need, without which you will stay a cold and shivering.

Low Nox 

This tankless water heater runs on gas, which means that there will be fumes. But Navien ensures that you and your family remain safe by emitting low levels of Nox. If you have a direct, or good venting system, then Nox won’t be a problem at all. The low levels are easily manageable with a fresh supply of air.

  • Energy efficiency

One of the most important parts of a water heater is its heat exchanger. It works under very harsh conditions and it is the one part which is responsible for fully transferring energy as well as heating water. So it has to tolerate thermal and mechanical stress both along with having to withstand corrosive substances. As such you should aim to get a durable heat exchanger which will last long. But along with being durable, it should be energy efficient as well. Both of these factors you will find in Navien.

It has a stainless steel exchanger which makes it long-lasting. Stainless steel is very effective when it comes to exchanging heat. So it enables the model to give you 97% of energy efficiency. That’s not all, when you turn off one faucet then the heater will shut itself down too. This will ensure that there’s no kind of standby heating loss. So it will lower your water heating bills and also your maintenance bills right at the same time.

  • Perfect for large homes

If you have a mid-sized house or have a commercial business for which you are looking for tankless heaters then Navien would be perfect for you. In a property or house, there will be many outlets like showerheads, laundry machines, and other appliances that will need hot water for their functioning. If you too have several outlets which will need hot water, then Navien is perfect for use. This model will be able to give hot water to multiple outlets even if you live in a cold region.

  • Mobile app

Many times when you think of a product then just its performance is taken into consideration. While that is a valid metric to judge anything but when it comes to tankless heaters then one must also take into view its ease of use. A difficult to use the product will waste your time and effort. Imagine not being able to find the start button even. But you don’t have to worry about such things with Navien.

This is because it comes with a mobile app that will let you control it from just about anywhere in the whole world. You will be able to turn it off or on, tinker with the settings, look for any errors in the functioning, and many more. This ensures that if you are in a hurry and have left the water heater on then you will be able to remotely switch it off without having to waste time and hurry back home. This mobile app will certainly end up saving you a lot of money.

  • Digital temperature

This heater doesn’t have a knob which you can use for changing the temperature. Instead, it has an arrow button that can be used instead. Above those arrows, there’s a screen that will let you know the current temperature of the water. The heater already comes present to give you an output of hot water that is at around 120 ℉. Your water temperature also depends on just how far it’s present from the fixtures. You can use the arrows to get the water temperature that you are comfortable with.


  • Great for mid-sized commercial properties and families
  • Energy efficient
  • High flow rate
  • Advanced technology for preheating
  • Durable stainless steel heat exchanger


  • Expensive
  • Not a good fit for large homes.


Overall, Navien NPE-240A Premium Condensing Tankless Gas Water heater is a great tankless water heater. It is great for mid-sized homes and can be used easily. Its advanced technology tracks your regular hot water usage and also keeps the water heated. The stainless steel heat exchanger is durable which will certainly lower your maintenance costs. It also has a high flow rate and is very energy efficient. If you can afford the cost then it will be a good fit for your home.

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