|Fuel Source||Natural Gas|
|Vent Type||Direct Vent|
|Gas Conversion Kit||Included|
|Flow Rate at 45F Temperature Rise (GPM)||6.5|
|Maximum Input Capacity (BTU)||150,000|
|Minimum Input Capacity (BTU)||15,000|
|Minimum Flow Rate (GPM)||0|
|Primary Vent Pipe Diameter (Inches)||3|
|Secondary Vent Pipe Diameter (Inches)||2|
|Gas Connection Size (Inches)||3/4|
|Cold Water Inlet (Inches)||3/4|
|Hot Water Outlet (Inches)||3/4|
|Product Height (Inches)||27 2/5|
|Product Width (Inches)||17 3/10|
|Product Depth (Inches)||11 2/5|
|Product Weight (Pounds)||75|
|Parts Warranty (Years)||5|
|Heat Exchanger Warranty (Years)||15|
|Energy Star Listed||Yes|
Navien has been pushing the boundaries of efficiency for 25 years. The NPE-180A is a result of their dedication to providing an effective and green water heating unit. The NPE-180A and all Navien models utilize condensing technology which captures additional heat lost by typical water heaters. The Navien NPE-180A's energy factor is superior to both traditional water heaters and noncondensing tankless models. Reduced vent temperatures due to this condensing technology allow you to use PVC venting, which saves you money and contributes to the ease of installation. The Navien NPE-180A has excellent technology for reducing your heating costs and carbon footprint.
ComfortFlow is Navien's recirculation system and it is included in the NPE-180A. By combining a small insulated buffer tank with a recirculation pump the NPE-180A ensures that you will always have hot water available instantly.
Help the Environment
The Navien NPE-180A will reduce your home's impact on the environment. Eco Pre-mixed Burners reduce CO and NOx emissions by combining gas heating and air before ignition. The result is a nearly 75% reduction in polluting emissions. In fact, an installed Navien NPE-180A reduces CO2 by the same amount as 31 cypress trees.
Navien products reduce energy consumption without sacrificing comfort. Their tankless models, such as this one, only heat water when you need it, reducing energy expenditure. Also, the NPE-180A uses a secondary heat exchanger to transform condensation and exhaust into additional heat. This reduces the ventilation temperature and increases the energy factor. The NPE-180A's efficiency translates directly into savings on operation costs for you!
The Navien NPE-180A uses stainless steel for the Eco Pre-mixed Burner and both heat exchangers. This prevents corrosion and increases the lifespan of your NPE-180A. Navien is so confident in the quality of their product that they offer a 15 year warranty on the NPE-180A's heat exchanger.
A Product You Can Trust
Navien products are recognized by an array of organizations. The NPE-180A is certified by Energy Star; the Air-Conditioning, Heating and Refrigeration Institute; the Canadian Standards Association; and the National Sanitation Foundation.
Amtrol - FT-109-100 - 2 Gallon - Expansion Tank & Fill Valve Combination Kit - With 1" Purger & Vent - 1/2" NPT Connection - 1 Gallons Max Acceptance
Navien - BCRA1129 - Ready-Link Communication Cable - For NR and NPE Series Tankless Water Heaters and CH Series Combi Boilers
Navien - NSUA900002A - Lead Free 3/4" Plumb Easy Valve Set with Pressure Relief Valve - For NR and NPE Series Tankless Water Heaters and CH Series Combi Boilers
Navien - 30010605A - Outdoor Vent Kit - For NPE-180A Tankless Water Heater
Navien - 30009757A - Remote Controller NR-20DU - For NPE Series Tankless Water Heaters
Navien - BH2535006A - 3" Vent Termination Caps and Wall Flanges - For NPE Series Tankless Water Heaters
We're sorry, the manuals for this product are not available at the manufacturer's request.
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