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CR-37 (dual) ROC 335298
Since 1979
NPE-A2 Advanced
CONDENSING TANKLESS WATER HEATER
Enjoy Hot Water Tonight!
How Reliable Are Navien Tankless Water Heaters?
Navien tankless water heaters stand out for their durability, offering a 15-year warranty on dual stainless steel heat exchangers—the longest in the industry—and a lifespan of up to 25 years with proper maintenance.
They achieve ultra-high efficiency with Uniform Energy Factors (UEF) up to 0.96, making them among the most energy-saving options available, potentially reducing energy usage by up to 44% compared to traditional tank models.
Many models qualify for Energy Star certification, confirming their longer lifespans, lower energy use, and reduced carbon footprint. Navien offers two primary lines: condensing (e.g., NPE-2 series with advanced features like ComfortFlow® for instant hot water) and non-condensing (e.g., NHW-A and NPN series for compact, retrofit-friendly installs).
A key benefit of tankless heaters is on-demand heating, avoiding stored water tanks. In condensing models, the process captures and reuses heat from exhaust steam, boosting efficiency while minimizing waste.
Recent 2025 updates include a new mobile app for remote control and Wi-Fi integration for smarter monitoring. While user reviews highlight strong performance and support.
Multi-line control with built-in intuitive software
Navien's new backlit EZNav™ control panel uses simple text and icons to make setup, operation status, and troubleshooting faster and easier.
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Self-diagnostics.
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Displays temperature and water flow rate.
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Displays the status of a cascade operation.
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Convertible display from °F to °C.
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User Friendly Interface.
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Easy setup.
How Long Does a Navien Last?
25+ years with proper maintenance
A Navien tankless water heater is about twice as expensive as a tank-type water heater; however, it lasts almost 3-times as long (Data obtained by the accelerated aging process).
If you install a new gas Navien tankless water heater today, you can enjoy reliable hot water for an average of 25+ years.
According to the experts, if you choose the optional scale inhibitor and install it on your new unit, its lifespan will increase by 5+ years. Note: Ask us about the ScaleRx limescale inhibitor.
Navien...the proven leader in condensing gas tankless,
It makes installing and setting up the new NPE-A2 series front touch panel even easier.
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2" PVC up to 75 feet and 1/2" gas up to 24 feet
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High efficiency up to 0.95 UEF and up to 15:1 TDR
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Durable dual stainless steel heat exchangers
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EZNav™ multi-line control with built-in intuitive software
7 Reasons Arizonians Choose Navien Over Other Brands
1) Longest-lasting components
Navien tankless water heaters feature a stainless steel heat exchanger, which lasts much longer than a copper heat exchanger in other tankless water heaters. Dual stainless steel heat exchangers extend the unit's life by resisting corrosion and limescale buildup.
2) Best Warranty
Navien offers 15 years on the heat exchanger in residential installations, five years for parts, and three years for artistry.
3) Lower Installation Cost
Because a Navien gas tankless uses ½" gas pipe (no need to install a larger gas line), and 2" PVC venting, you'll save on installation costs – it can be installed in about half the time as competitors' tankless brands.
4) Unlimited Hot Water
Since there is no capacity tank, you'll have endless hot water whenever you want it and never run out again.
5) Longest Lasting Gas Tankless
The average competitor gas tankless water heater lasts about 15 years, and the Navien tankless lasts an average of 25+ years with a scale inhibitor installed and with proper maintenance.
6) Energy Star
The NPE model was the first gas water heater to be "Energy Star Certified" and is the most energy-efficient tankless water heater in the industry average.
7) More Options Than Other Brands
Navien gas tankless water heaters offer the most options for your tankless water heater needs.
Navien NPE-A2 "Comfort-Flow" System
Navien tankless water heaters are the first and only systems that utilize a built-in insulated buffer tank and recirculation pump.
The buffer tank eliminates the bursts of cool water you get with other systems (cold water sandwich) and the minimum flow rates in other tankless water heaters.
Built-in recirculation system
Navien’s patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater, resolving the cold-water sandwich effect* and issues of minimal flow rates commonly found in other tankless water heaters.
* The “cold-water sandwich effect” is the undesired introduction of cold water into the hot water supply line on occasions of frequent on/off operations. (Measure Guideline: Transitioning to a Tankless Water heater, DOE, Sept.2012).
The built-in recirculation pump allows the NPE-A2 to recirculate water through an external recirc line or existing supply lines while using NaviCirc® without needing external pumps or controls.
Optional NPE-A2 recirculation valve
Designed for recirculation of domestic hot water in home applications where a dedicated (extra hot water) return line is not available.
Part No. PFFW-001, NaviCirc Kit: 30022965A. External recirc pump and check valves not included.
Optional Wi-Fi remote control system
NaviLink makes communicating with your Navien systems easily anywhere internet service is accessible. The NaviLink module attaches quickly to any new or existing* Navien tankless water heater, combi‐boiler, and boiler.
* Existing installations may require the purchase of a new main PCB and front control panel.
For Larger Applications, Cascading up to 32 units and common vent up to 12 units
Cascade up to 32 units with Navien Ready-Link® technology.
With Navien's Ready-Link® cascading technology, when a unit gets up to 80% capacity the next unit will turn on to help meet requirements. The flow-on-demand ratio will continue until all 32 units are generating hot water as needed. The Navien cascading system also balances out the workload of each unit for longer life.