NOTE: Navien has ceased selling their units on Amazon.com.
Let's take a look at some of the best Navien tankless water heaters on the market.
I can't even count how many times I've been asked about "the best" tankless water heater. To the frustration of my customers, it's a hard question to answer. How do you define best? What functions and features do you prioritize over others? Is price the deciding factor for you, or are you more concerned with power, performance, flow rate, energy efficiency or long-term value?
The bad news is that there isn't a single water heater that will suit everyone. The good news is that there is one brand that you can choose from if you're looking for high-quality, high-powered tankless water heaters.
I could go into the history of the brand, but I doubt you care about that. Here's what you need to know about Navien: They sell some of the most powerful tankless water heaters on the market.
While other companies are puttering around with units that only generate 2-3 gallons per minute (GPM), Navien creates products that offer 10 GPM or more.
While other companies are warning their buyers about the fumes and gases that come with natural gas and propane water heaters, Navien revolutionizes the industry and creates special low-NOx condensing technology to negate the risk.
All in all, if you're looking for the brand that sets the curve, Navien is it.
Top 4 Navien Tankless Water Heaters Reviewed
So which Navien units are the best of the best? I'm glad you asked. I've put together a list of Navien tankless water heater reviews, and I believe they can help you decide which model is right for you. Let's go!
1. Navien NPE-240A Premium Condensing
The NPE-240A Premium Condensing offers a staggering 11.2 GPM, more than enough for simultaneous sinks and showers and triple what other tankless water heaters can provide.
It does need 199,999 BTUs, an energy requirement that's rather high, but rest assured that the unit boasts a 97 percent energy efficiency regardless.
In terms of size, the NPE-240A Premium Condensing clocks in at 17.3 x 13.2 x 27.4 inches and 82 pounds, and it can be installed both indoors and outdoors depending on your wishes.
As a whole-house unit, the NPE-240A Premium Condensing will serve multiple bathrooms from a single location. You can also link multiple units together to provide hot water for high-demand or large-area locations such as schools, hospitals and commercial buildings. Don't worry about installation sites, either; though it's a natural gas unit that requires venting, it can be installed indoors and outdoors because of its special low-NOx condensing technology.
Heat Output and Flow
As previously mentioned, the NPE-240A Premium Condensing boasts 11.2 GPM, a remarkable number that's almost unprecedented in tankless water heaters. You can expect your range to be from 98°F - 140°F in terms of water temperature. You can also change your display to give Celsius numbers if you prefer; the unit comes with a clear digital interface and easy-to-use buttons.
This unit may have a special internal condensing system, but don't let that fool you into thinking installation will be easy. It still requires special vents to prevent fume build-up, especially if you're installing the NPE-240A Premium Condensing indoors.
If you have any questions about what to do, contact Navien technicians.
-Powerful whole-house unit provides 11.2 GPM
-Internal condensing system takes care of the worst of the fumes
-Comes with many special features
-Can require up to 199,999 BTUs
-Installation comes with venting needs
2. Navien NPE-240-A
This unit is very much like the one above, but it comes with the notable difference that it doesn't use a low-NOx internal combustion system.
This makes the NPE-240-A both bigger and bulkier (13.2 x 17.3 x 27.4 inches and 92 pounds) than its counterparts, and you'll need special equipment if you want to install it indoors. The good news is that it still comes with an 11.2 GPM flow rate, so if you're looking for power, this is another product that will give you what you want.
Without the special combustion system of the unit above, the NPE-240-A lags slightly behind in terms of energy efficiency and ease of installation. Never fret, however; it's still an extremely powerful unit that can serve four or more bathrooms at once. Fill up the tub; do a load of laundry; run the dishwasher a few times. The NPE-240-A can handle it all.
Heat Output and Flow
The NPE-240-A offers the same heat and pressure as the NPE-240-A Premium Condensing, so you'll enjoy 11.2 GPM and a temperature range from 98°F - 140°F. Something new, however, is that the purchase of a NPE-240-A comes with a buffer tank and recirculation pump right in the box. It may not have internal condensing power, but all Navien products want you to be safe.
This is the product that comes with a buffer tank and recirculation pump included with every purchase, and it can also be hooked up to your home's HVAC system with your existing ground line, so it's actually relatively simple to install.
Again, however, you might want to let trained technicians handle it if you're nervous. You can also check out installation guidelines on Amazon.
-Can be converted between natural gas and propane
-Buffer tank prevents cold water "sandwiches"
-Utilizes your existing gas line
-Heavy, hard-to-maneuver unit
-Lacks the internal condensing properties of other Navien products
-On the upper tier of affordability
3. Navien NPE-180A Premium Condensing
Offering 8.4 GPM at 120 volts, the NPE-180A Premium Condensing isn't the strongest tankless water heater on the market, but it's far from the weakest either.
It's a nice, study model at 17.3 x 11.4 x 27.4 inches and 75.5 pounds, and it's wall-mounted to boot, so you can enjoy the heft of a powerful unit without sacrificing any floor space for it.
If you want a natural gas model that will get the job done, try putting the NPE-180A Premium Condensing on your shortlist.
We're back to the condensing units!
The NPE-180A Premium Condensing more than lives up to its promises of energy efficiency; as a certified Energy Star product with all the low-NOx features you've come to expect from Navien, the NPE-180A Premium Condensing will save you plenty of money on your energy bill. It's a whole-house unit, too, so you'll be eco-friendly without sacrificing any of your daily hot water needs.
Heat Output and Flow
Most Navien products offer a temperature range of 98°F - 140°F, so it should come as no surprise that the NPE-180A Premium Condensing is the same. While its flow rate (8.4 GPM) is slightly lacking when compared to other products from the Navien line, it's still more than enough for what the industry calls "simultaneous usage."
All things considered, it's a powerful and customizable unit that deserves a look.
With two stainless steel heat exchangers and internal preheating technology, you might think that the NPE-180A Premium Condensing would be a nightmare to install. You'd be wrong! It uses your existing 1/2" gas line and is also fully convertible between natural gas and propane. It's designed to be easy to use and easy to install.
-Low-NOx system breaks down harmful fumes before they can escape the unit
-Can be hooked up to other units for commercial use
-Good balance of power and precision
-Heavy box can be difficult to haul and install
-Energy efficiency is lacking when compared to other Navien products
-Not the most affordable on the market
4. Navien NPE-210A Premium Condensing
Boasting a flow rate of 10.1 GPM, the NPE-210A Premium Condensing is more than a match for others on this list of Navien tankless water heater reviews. It's powered by 120 volts/200 watts; it has all the condensing properties you'd expect from an indoor/outdoor unit; it comes with a 15-year warranty that will protect you long after the shine has worn off the box.
There are a lot of reasons I recommend the NPE-210A Premium Condensing to my customers, but the biggest one is that it's just plain convenient.
It offers a good flow rate and requires only minimal energy in response; it has an internal condensing system for the safety of families and small children; it comes with a solid warranty that will cover you for years to come.
Heat Output and Flow
Would I surprise you if I said the NPE-210A Premium Condensing comes with a temperature range of 98°F - 140°F? You can laugh, but this is a sign that Navien doesn't compromise when it comes to customization. It's a brand that wants its customers to have options, so between 98°F - 140°F and 10.1 GPM, this is a nice unit.
While I always recommend letting a trained technician handle the installation of tankless water heaters, the NPE-210A Premium Condensing is one that a determined DIYer could handle. This is because of both its compatibility with existing systems and its detailed instruction manual that anyone can understand.
-Low-NOx emissions (≤ 20ppm)
-Strong GPM works even in large homes
-No flow delays when firing up product in the mornings
-Display is rather small and hard to read
-Installation of gas-powered unit requires venting
-Can get expensive, especially with add-ons
The Best Navien Tankless Water Heater
NPE-240A Premium Condensing
The NPE-240A Premium Condensing is simply the best value for the money. Not only will you enjoy one of the highest flow rates on the market (11.2 GPM), but you'll also reap the cost- and energy-saving benefits of 97 percent thermal efficiency.
It's a low-NOx system, so you won't harm your indoor air quality with its installation, and you can customise its temperature from 98°F - 140°F.
Speaking of customization, the NPE-240A Premium Condensing also comes with a myriad of special features and controls, including cascade functions and Celsius-to-Fahrenheit conversion options.
All in all, the NPE-240A Premium Condensing is what you're looking for when only the best will do.