Navien
Navien NPE-240S2 High Efficiency Condensing Tankless Water Heater - 199,000 BTU
£299.00All prices include any applicable taxes · Free UK delivery, 3–6 business days
- Free UK delivery — 3–6 business days
- 14 days to change your mind
- Prepaid return label already in the box
- Questions? Mon–Fri, 9:00 AM – 5:00 PM UK time
Navien NPE-240S2 - Condensing Tankless Water Heater - 199,000 BTU
Discover the Navien NPE-240S2, a premium condensing tankless water heater engineered to deliver reliable, high-capacity hot water for residential and commercial applications. Featuring an input range of 13,300 to 199,900 BTU/h and an impressive 0.96 UEF, this ENERGY STAR® certified unit ensures ultimate energy efficiency and performance. It 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 the ideal hot water solution for both large-volume and low-demand needs.
Designed for versatile indoor or outdoor wall-hung installation, the NPE-240S2 utilizes ultra condensing technology and durable dual stainless steel heat exchangers. It includes an intuitive EZNav™ control panel with a built-in HotButton™ interface and is compatible with NaviLink™ for seamless remote access. Field convertible between natural gas and propane, it supports cascading of up to 12 units for expanded hot water demands. With ultra-low NOx emissions and 1/2" gas line compatibility up to 24 feet, it offers maximum installation flexibility.
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
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
PNAV000037
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Delivery
We pick and pack within 1–2 business days, then Royal Mail typically takes 2–4 business days. That is 3–6 business days in total, free on every order with no minimum spend. We deliver within the United Kingdom.
Returns and refunds
You have 14 days from delivery to return this for a refund, in addition to your statutory 14-day cancellation right. A prepaid return label is included in your parcel, there is no restocking fee, and refunds are processed within 5 business days of your return arriving.