Our standard ultra condensing tankless technology with the industry’s top rated unit for energy efficiency
| Item |  NPE-150S |
|
|---|---|---|
| Summary |
|
|
| Heat Capacity (input) | Natural gas | 18,000 – 120,000 (BTU/H) |
| Propane gas | 18,000 – 120,000 (BTU/H) | |
| Efficiency Ratings | UEF (NG & LP) | 0.96 |
| EF (Canada NG & LP) | 0.97 | |
| Flow rate (DHW) | 35°F (19°C) temp rise | 6.8 GPM (25.7 L/m) |
| 45°F (25°C) temp rise | 5.3 GPM (20.1 L/m) | |
| 67°F (37°C) temp rise | 3.2 GPM (12.1 L/m) | |
| Dimensions | 17.3″ W x 27.4″ H x 13.2″ D | |
| Weight | lbs (0kg) | |
| Installation Type | Indoor or outdoor wall-hung | |
| Venting Type | Forced draft direct vent | |
| Ignition | Electronic ignition | |
| Water Pressure | 15.0-150.0 psi | |
| Natural gas supply pressure (from source) | 3.5″ WC to 10.5″ WC | |
| Propane gas supply pressure (from source) | 8″ WC to 13″ WC | |
| Natural gas manifold pressure (min-max) | -0.04″ WC to -0.38″ WC | |
| Propane gas manifold pressure (min-max) | -0.04″ WC to -0.42″ WC | |
| Minimum flow rate | 0.5 GPM (1.9 L/m) | |
| Connection Sizes | Cold water inlet | 3/4″ |
| Hot Water Outlet Size | 3/4″ | |
| Gas inlet | 3/4″ | |
| Power Supply | Main supply | 120V AC, 60Hz |
| Maximum power consumption | 200W (max 2A), 350W (max 4A) with external pump connected | |
| Materials | Casing | Cold rolled carbon steel |
| Heat exchangers | Primary heat exchangers: stainless steel, secondary heat exchangers: stainless steel | |
| Venting | Exhaust | 2″ or 3″ PVC, CPVC, polypropylene / 2″ or 3″ special gas vent type BH (Class II, A/B/C) |
| Intake | 2″ or 3″ PVC, CPVC, polypropylene / 2″ or 3″ special gas vent type BH (Class II, A/B/C) | |
| Vent clearances | 0″ to combustibles | |
| Safety Devices | Flame rod, APS, ignition operation detector, water temperature high limit switch,exhaust temperature high limit sensor, power surge fuse | |
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When it comes to water heater performance it’s all about the output.
The NPE-S condensing tankless water heaters are so efficient that they outperform much larger capacity non-condensing competitors. More output for the money, lower installation costs and lower operating costs for customers makes it a smart choice.
Front Panel Control Center
Common vent up to 8 units
Cascade up to 16 units with Navien Ready-Link® technology.
Optional Wi-Fi remote control system
NaviLink makes it easy to communicate with your Navien systems anywhere internet service is accessible. The NaviLink module attaches easily to any new or existing* Navien NPE Series tankless water heater, NCB-E Series combi‐boiler and NHB Series boiler.
Ready-Link® Manifold System for mounting on a wall or rack
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