Navien NPE-240S2 – Condensing Tankless Water Heater – 199,000 BTU
The Navien NPE-240S2 is a condensing tankless water heater with an input range of 13,300 to 199,900 BTU/h and a 0.96 UEF, supplying up to 11.2 GPM of continuous hot water.
- 199,900 BTU/h input with 0.96 UEF
- Up to 11.2 GPM at a 35°F temperature rise
- Dual stainless steel heat exchangers, ultra-condensing efficiency
$564.99
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Description
Navien NPE-240S2 – Condensing Tankless Water Heater – 199,000 BTU
The Navien NPE-240S2 is a condensing tankless water heater with an input range of 13,300 to 199,900 BTU/h and a 0.96 UEF, supplying up to 11.2 GPM of continuous hot water. It is ENERGY STAR® certified, installs indoors or outdoors, and suits homes with several bathrooms as well as light commercial buildings.
Key Features
- 199,900 BTU/h input with 0.96 UEF
- Up to 11.2 GPM at a 35°F temperature rise
- Dual stainless steel heat exchangers, ultra-condensing efficiency
- EZNav™ backlit multi-line control panel with HotButton™
- Field-convertible gas system (NG/LP)
- Indoor or outdoor wall-hung installation
- 1/2" gas line capable up to 24 ft
- Ultra-low NOx emissions (20 ppm)
- Minimum flow rate of just 0.5 GPM
- 2" venting up to 60 ft, 3" up to 150 ft
- Cascading up to 12 units; common venting capable
- CSA listed, AHRI certified, ENERGY STAR®, NSF listed
Ideal For
- Homes with high hot-water demand
- Light commercial water heating
- Cascaded multi-unit systems
Specifications
| Brand | Navien |
|---|---|
| SKU | TGG-TWH-019 |
| Model | NPE-240S2 |
| Input | 13,300–199,900 BTU/h |
| Efficiency | 0.96 UEF |
| Max flow | 11.2 GPM at 35°F rise |
| Recirculation | HotButton™ / NaviCirc® ready |
| Fuel | Natural gas or propane (field convertible) |
| Connections | 3/4" NPT gas, hot, cold |
| Power | 120V, 60Hz, single phase |
| Condition | New |
Installation
Professional installation by a licensed gas or heating contractor is required; check local codes before purchase.
Shipping & Returns
- Free shipping within the continental United States
- 90-day returns on unused items in original packaging
Appliances Corner Store is an independent retailer and is not affiliated with Navien. Brand names and model numbers are used only to identify the product.

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