Why Condensing vs Non-Condensing

Before you pick a non‑condensing tankless water heater to save money, check out the total costs of the NPE-S Series.

More output for the money. With high efficiency condensing technology, NPE-S units deliver more BTUs where it counts, resulting in greater flow rates than comparable condensing and non-condensing tankless units.

Lower installation costs for you. You can typically install a NPE-S in half the time of other tankless units — usually within 4 hours, with more flexibility and lower material costs.

Lower operating costs for the homeowner. Our industry leading 0.99 EF can save the homeowner more on the yearly operating costs.

When it comes to water heater performance…
it’s all about the output

The NPE-S condensing tankless water heaters are so efficient that they outperform much larger capacity non‑condensing competitors.
More output for the money, lower installation costs and lower operating costs for customers makes it a smart choice.



Why Choose Navien?

With Navien’s unique and proprietary heat exchanger design the NPE-S is able to achieve the industry leading 0.99EF / 0.97 UEF.

Navien’s unique condensing heat exchanger design uses heat from the flue gases to preheat the water in the most efficient way available today. This design requires less input to achieve a higher output than a comparable tankless water heater. That means savings on gas and a better performance. For example, a NPE-210S with an input of 180,000 BTU/H has a higher output (~178,000) than a non-condensing 199,000 BTU/H unit with an output of ~163,000.

With Navien’s condensing technology, you get the best of both worlds: the best value and “ultra condensing efficiency”, which offers substantial savings and contributes to a green-friendly environment. Plus, the installation and venting processes are easy, cost effective, and Navien’s products are simply the best in quality and performance.

Ultra Condensing Efficiency

Navien’s condensing efficiency boasts one of the industry’s highest ratings of 0.99 energy factor. Customers can take advantage of the low annual operating costs and receive the best value and payback, compared with conventional tankless or tank-type water heaters.

*Based on a cost of 1.09 per therm used

Condensing VS Non-Condensing