Navien NPE-180S2 – Condensing Tankless Water Heater – 150,000 BTU
The Navien NPE-180S2 is a high-efficiency condensing tankless water heater built to provide continuous hot water for residential homes. With an input range of 15,000 to 150,000 BTU per hour and a Uniform Energy Factor of 0.96, this unit is Energy Star certified and delivers reliable performance with reduced energy costs. It supports flow rates up to 8.4 gallons per minute at a 35°F rise, making it well-suited for homes with multiple bathrooms or simultaneous hot water needs.
Engineered with dual stainless steel heat exchangers for enhanced durability and ultra condensing performance, the NPE-180S2 is designed for indoor or outdoor wall-hung installation. It includes the EZNav™ multi-line control panel with integrated HotButton™ control and supports cascading with up to 32 units using Navien’s Ready-Link system. Approved for direct venting, it supports 2″ venting up to 60 feet and 1/2″ gas line capability up to 24 feet, offering flexible, space-saving installation options.
Features
Up to 150,000 BTU/h input capacity
0.96 UEF and Energy Star certified
Flow rate: 8.4 GPM at 35°F rise
Dual stainless steel heat exchangers
Ultra condensing efficiency
Low NOx emissions (20 ppm)
Field convertible gas system (NG/LP)
Indoor or outdoor wall-hung installation
EZNav™ control panel with HotButton™
Cascading capable with up to 32 units via Ready-Link
Direct venting: 2″ PVC up to 60 feet
1/2″ gas pipe capable up to 24 feet
Gas connection: 3/4″ NPT
Water connections: 3/4″ hot and cold
120V, single phase operation
Applications
Residential homes with high hot water demand
Multi-bathroom households
Compact installations needing wall-hung systems
Projects requiring venting and gas line flexibility
Multi-unit cascade setups for greater capacity
Product Includes
1 –  Wall Mounting Bracket
4 – Tapping Screw and Anchor
2 – Vent Terminator
4 – Wall Flanges
 
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