Navien Premium NPE-180A2 Condensing Tankless Water Heater

The Navien Premium NPE-180A2 Condensing Tankless Water Heater is a high-efficiency, natural-gas water heater designed to provide continuous hot water without the floor-space requirements of a conventional storage tank. With up to 150,000 BTU/h of heating input, a 0.95 UEF rating and flow rates up to 8.4 GPM at a 35°F temperature rise, it offers dependable performance for homes with moderate to high hot-water requirements.

The NPE-180A2 heats water only when required, helping reduce standby energy loss associated with traditional tank-style water heaters. Its modulating burner adjusts gas consumption according to the current hot-water demand, supporting efficient operation across varying household usage conditions.

A key advantage of the NPE-A2 Advanced Series is Navien’s built-in ComfortFlow® recirculation system. This system combines an integrated recirculation pump, buffer tank and intelligent controls to help reduce the wait for hot water at compatible fixtures. The buffer tank also helps minimize the “cold-water sandwich” effect sometimes experienced with conventional tankless systems.

Dual stainless-steel heat exchangers provide corrosion resistance and dependable long-term performance. The field-convertible gas system allows the unit to operate with natural gas or propane when converted by a qualified professional using the supplied conversion components.

The compact wall-mounted cabinet measures approximately 17.3 inches wide, 27.4 inches high and 13.2 inches deep. It can be installed indoors or outdoors with the appropriate Navien outdoor vent kit, providing flexibility for replacement projects and new residential installations. Outdoor installation should only be considered where the climate and installation requirements permit.

The built-in EZNav™ multiline control panel offers convenient temperature adjustment, operating information and system monitoring. Additional features include built-in HotButton™ control, electronic ignition, cascading capability and common venting support for compatible multi-unit applications.

Low exhaust temperatures allow the use of approved PVC, CPVC, polypropylene or stainless-steel venting. Two-inch venting can extend up to 75 equivalent feet, helping simplify installation in many residential applications when all manufacturer requirements and local codes are followed.

Key Features

Up to 150,000 BTU/h Heating Input
Delivers responsive hot-water performance for properly sized residential applications.

0.95 UEF High-Efficiency Performance
Advanced condensing technology captures additional heat to support efficient natural-gas or propane operation.

Up to 8.4 GPM Flow Rate
Provides up to 8.4 GPM at a 35°F temperature rise, with actual flow depending on incoming-water temperature and required outlet temperature.

Built-In ComfortFlow® Recirculation
Combines an integrated recirculation pump, buffer tank and intelligent controls to help reduce hot-water waiting time.

Dual Stainless-Steel Heat Exchangers
Provides durable, corrosion-resistant construction for reliable long-term operation.

Natural Gas and Propane Convertible
Supplied for natural gas and field convertible to propane by a qualified service professional.

Compact Wall-Mounted Design
Saves valuable floor space compared with a conventional tank-style water heater.

EZNav™ Digital Control Panel
Provides intuitive temperature control, operating information and system monitoring.

Flexible Venting Options
Supports approved PVC, CPVC, polypropylene and stainless-steel venting, including two-inch venting up to 75 equivalent feet.

ENERGY STAR® Certified
Certified for efficient domestic hot-water performance with a 0.95 UEF rating.

Low-NOx Operation
Produces less than 20 ppm NOx to support cleaner combustion.

Manufacturer Warranty Protection
Includes a 15-year limited heat-exchanger warranty and a five-year limited parts warranty for qualifying residential installations with standard or controlled recirculation. Manufacturer terms and conditions apply.

Why Buy the Navien NPE-180A2 Tankless Water Heater?

The Navien NPE-180A2 is an excellent choice for homeowners seeking efficient on-demand hot water, reduced waiting time and a compact installation. Its built-in ComfortFlow® recirculation system, dual stainless-steel heat exchangers, 0.95 UEF rating and flexible venting design provide an effective balance of comfort, efficiency and long-term reliability.

Professional sizing is important because available flow depends on the incoming-water temperature and required temperature rise. Contact ZERO HVACR for a free quote and professional assessment to confirm whether the Navien NPE-180A2 is the right capacity for your home.