Navien NPE-180S2 Condensing Tankless Water Heater

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 31.8 L per minute at a 1.7 °C 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 5.1 cm venting up to 1828.8 cm and 1/5.1 cm gas line capability up to 731.5 cm, 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 1.7 °C 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: 5.1 cm PVC up to 1828.8 cm
• 1/5.1 cm gas pipe capable up to 731.5 cm
• Gas connection: 3/10.2 cm NPT
• Water connections: 3/10.2 cm 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

PNAV000021