Water Heater Gas Tankless
Navien NPE-S2
Navien NPE-S2 condensing gas tankless water heater. Standard condensing configuration without built-in ComfortFlow hardware, positioned for lower installation and operating cost with optional recirculation accessories.
Fuel
Natural Gas (LP convertible)
Power Source
GAS
Condensing
Yes
Vent Type
Direct Vent
Venting
2 in PVC up to 75 ft
Gas Line Support
1/2 in gas pipe up to 24 ft
Model Comparison
4 models
| Specification | 120,000 BTU | 150,000 BTU | 180,000 BTU | 199,900 BTU |
|---|---|---|---|---|
| Model | NPE-150S2 | NPE-180S2 | NPE-210S2 | NPE-240S2 |
| UEF | 0.93 | 0.96 | 0.96 | 0.96 |
| dhw_flow_35f_gpm | 6.8 GPM | 8.4 GPM | 10.1 GPM | 11.2 GPM |
Shared Specifications
All models| Fuel | Natural Gas (LP convertible) |
| Power Source | GAS |
| Condensing | Yes |
| Vent Type | Direct Vent |
| venting | 2 in PVC up to 75 ft |
| gas_line_support | 1/2 in gas pipe up to 24 ft |
| Installation | INDOOR_OR_OUTDOOR |
| Application | RESIDENTIAL |
| ENERGY STAR® | Yes |
| limited_heat_exchanger_warranty_years | 15 yr |
| limited_parts_warranty_years | 5 yr |
| cascade_units_max | 32 |
| common_vent_units_max | 12 |
| Type | Water Heater |