Navien NPE-180A2 – Condensing Tankless Water Heater – 150,000 BTU
The Navien NPE-180A2 is a high-efficiency condensing tankless water heater designed for residential and light commercial use. With a capacity range of 10,000 to 150,000 BTU per hour and a Uniform Energy Factor of 0.95, it delivers powerful performance while minimizing energy waste. The unit provides a maximum flow rate of 8.4 GPM at a 35°F temperature rise, making it suitable for multiple simultaneous hot water demands. Compact and wall-hung, it installs easily indoors or outdoors and supports field conversion between natural gas and propane.
Equipped with Navien’s dual stainless steel heat exchangers and a built-in recirculation pump, the NPE-180A2 offers exceptional durability and faster hot water delivery. It features the EZNav™ multi-line control panel with integrated HotButton™ for user-friendly control, and it supports cascading and common venting with up to 12 units. Approved for 2″ or 3″ venting materials, it supports long vent runs and uses a 1/2″ gas line up to 24 feet. With ultra-low NOx emissions and multiple built-in features, the NPE-180A2 meets a wide range of installation needs with high efficiency and flexibility.
Features
150,000 BTU/h input with 0.95 UEF efficiency
Flow rate up to 8.4 GPM at 35°F rise
Dual stainless steel heat exchangers
Built-in recirculation pump
Field convertible between natural gas and propane
Ultra Low NOx emissions (20 ppm)
EZNav™ multi-line control panel with HotButton™ interface
1/2″ gas line capable up to 24 feet
Indoor or outdoor wall-hung installation
Vents with 2″ up to 75 ft or 3″ up to 150 ft
Cascading and common venting with up to 12 units
Applications
Residential hot water systems
Light commercial water heating
Installations requiring high flow at high efficiency
Projects needing venting flexibility and compact design
Multi-unit configurations with cascading or common venting requirements
 
Navien NPE-A2 simply a smarter hot water system for today’s life styles
Navien…the proven leader in condensing tankless, makes it even easier to install and set up with the new NPE-A2 series
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 either through an external recirc line or through existing supply lines while using NaviCirc®, without the need for external pumps or controls.
 
 
Multi-line control with built-in intuitive software 
Navien’s new backlit EZNav™ control panel uses simple text and icons to make set up, operation status and troubleshooting faster and easier than ever before.
Self-diagnostics.
Displays temperature and water flow rate.
Displays status of cascade operation.
Convertible display from °F to °C.
User Friendly Interface.
Easy setup.
 
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