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NPE-240S2 – Condensing Tankless Water Heater – 199,000 BTU
NPE-240S2 – Condensing Tankless Water Heater – 199,000 BTU
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Navien NPE-240S2Condensing Tankless Water Heater · 199,000 BTU
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 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.
Technical specification
| Input range | 13,300 to 199,900 BTU/h |
|---|---|
| Efficiency | 0.96 UEF, ENERGY STAR® certified |
| Flow rate | Up to 11.2 GPM at 35°F rise; minimum 0.5 GPM |
| Heat exchangers | Dual stainless steel, ultra condensing |
| Emissions | Low NOx (20 ppm) |
| Installation | Indoor or outdoor, wall-hung |
| Fuel | Field convertible — natural gas or propane |
| Controls | EZNav™ panel with HotButton™ interface, NaviLink™ compatible |
| Cascading | Up to 12 units, common venting capable |
| Gas piping | 1/2″ gas pipe compatible up to 24 ft |
| Venting | 2″ up to 60 ft, 3″ up to 150 ft |
| Connections | 3/4″ NPT for gas, hot, and cold water |
| Power | 120V, 60Hz, single-phase |
| Certifications | CSA Listed, AHRI Certified, ENERGY STAR®, NSF Listed |
Applications
High-Demand Homes
Residential homes with high simultaneous water demand.
Light Commercial
Light commercial hot water systems.
Indoor or Outdoor
Installations needing compact, wall-mounted design.
Gas & Venting Flexibility
Projects requiring gas and venting flexibility.
Multi-Unit Cascade
Multi-unit cascade-ready setups.
Key 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)
- EZNav™ control panel with HotButton™ 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
Navien NPE-240S2 condensing tankless water heater. Follow the installation manual, venting requirements, local gas and plumbing codes, and manufacturer instructions.
