NPE-240S2 - Condensing Tankless Water Heater - 199,000 BTU

Navien NPE-240S2 - Condensing Tankless Water Heater - 199,000 BTU

The Navien NPE-240S2 is a premium condensing tankless water heater built to deliver reliable, high-capacity hot water for residential or commercial applications. With a powerful input range of 13,300 to 199,900 BTU/h and an impressive 0.96 UEF, it’s ENERGY STAR® certified for efficiency and performance. This unit delivers up to 11.2 gallons per minute at a 35°F temperature rise and operates at flow rates as low as 0.5 GPM, making it ideal for both large-volume and low-demand applications.

Designed for indoor or outdoor wall-hung installation, the NPE-240S2 features ultra condensing technology and durable dual stainless steel heat exchangers. It includes the intuitive EZNavTM control panel with a built-in HotButtonTM interface and is compatible with NaviLinkTM for remote access. The unit is field convertible between natural gas and propane and supports cascading of up to 12 units for expanded demand. With ultra-low NOx emissions and 1/2" gas line compatibility up to 24 feet, it offers maximum flexibility for a wide range of installations.

Features

• 199,900 BTU/h input with 0.96 UEF efficiency
• Up to 11.2 GPM at 35°F temperature rise
• Dual stainless steel heat exchangers
• Ultra condensing performance
• Low NOx emissions (20 ppm)
• Minimum flow rate: 0.5 GPM
• Indoor or outdoor wall-hung installation
• Field convertible gas system (NG or LP)
• EZNavTM control panel with HotButtonTM interface
• Cascading capable with up to 12 units
• Common venting capable
• 1/2" gas pipe compatible up to 24 ft
• 2" venting up to 60 ft, 3" venting up to 150 ft
• 3/4" NPT connections for gas, hot, and cold water
• 120V, 60Hz, single-phase power supply
• CSA Listed, AHRI Certified, ENERGY STAR®, NSF Listed

Applications

• Residential homes with high simultaneous water demand
• Light commercial hot water systems
• Indoor or outdoor installations needing compact, wall-mounted design
• Projects requiring gas and venting flexibility
• Multi-unit cascade-ready setups

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