NPE-180S2 – Condensing Tankless Water Heater – 150,000 BTU

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