

NPE-240S2 - Condensing Tankless Water Heater - 199,000 BTU
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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 EZNav™ control panel with a built-in HotButton™ interface and is compatible with NaviLink™ 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)
- 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
Returns & Refunds
My plant arrived damaged or wilted — what do I do?
Email us at contact@shaqwayaliving.com within 24 hours of delivery with photos of the plant and its packaging. We'll send a free replacement or full refund. See our Returns & Refunds Policy for details.
Can I return a plant if I just change my mind?
Live plants aren't returned for change of mind — the 24-hour arrival guarantee covers quality and transit issues instead. Planters and plant-care accessories can be returned within 30 days for any reason.
How long do refunds take?
Once your return or claim is approved, refunds are processed within 5 business days to your original payment method. Your bank may take a few extra days to post the funds.
Shipping
How much does shipping cost?
Shipping is free on all orders, to both the US and UK.
How long will my order take?
Orders are prepared for shipment within 1–2 business days. Delivery then typically takes 2–4 business days within the US. See our Shipping Policy for UK delivery times and customs information.
How are plants packed for shipping?
Every plant ships in insulated, weather-aware packaging with moisture control and leaf protection, adjusted to conditions on your route, to keep it healthy in transit.
Can I track my order?
Yes — you'll automatically receive a tracking link by email once your order ships.

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