Features
Ultra Condensing Efficiency
- Navien’s Condensing Technology offers the high efficiency.
- Money and energy savings over tank type water heaters and traditional water heaters.
Two Stainless Steel Heat Exchangers
- Provides longer life expectancy as they are highly resistant to corrosion and erosion compared to copper heat exchangers.
- Reduces minerals deposits.
Low NOx Emissions (≤ 20ppm)
- New metal fiber burner is designed to deliver a consistent air/gas mixture improving combustion efficiency.
- Result in less acid rain and less green house effect.
- Comply with SCAQMD 1146.2 strict NOx emissions standard.
2” PVC, CPVC, Polypropylene Venting Up To 60’
- 2” venting option allows for a flue to be pulled through the existing vent.
- 3” vents can be used up to 150’ with standard 2” x 3” adapters.
Utilizes Existing 1/2″ Gas Line
- The negative pressure gas valve and fan with dual venturi operation allows for better adaptability to low gas pressure applications.
- Makes it possible for the NPE to be installed ½” gas lines up to 24’.
Field Convertible
- NPE models allow for easy convertibility from NG to LP.
Less Water Pressure Drop
- Simple modular for water path minimizes water pressure drop.
- Modular design for water path make maintenance easier and service can be performed easily in the field.
Intelligent Preheating Technology
- Recognizes hot water usage patterns to intelligently provide hot water when needed.
Specifications
| Data Field |
NPE-180A |
| Heat Capacity (Input) |
Natural Gas |
15,000-150,000 BTU/h |
| Propane Gas |
15,000-150,000 BTU/h |
| Efficiency Ratings |
UEF (for NG & LP) |
0.96 |
| EF (Canada) (for NG & LP) |
0.97 |
| Flow Rate (DHW) |
35⁰F(19⁰C) Temp Rise |
8.4 GPM (32 L/m) |
| 45⁰F(25⁰C) Temp Rise |
6.5 GPM (25 L/m) |
| 67⁰F(36⁰C) Temp Rise |
4.3 GPM (16 L/m) |
| Dimensions |
17.3″(W) x 27.4″(H) x 13.2″(D) |
| Weight |
75 lbs (34kg) |
| Installation Type |
Indoor or Outdoor Wall-Hung |
| Venting Type |
Forced draft direct vent |
| Ignition |
Electronic Ignition |
| Water Pressure |
15-150 PSI |
| Natural Gas Supply Pressure (from source) |
3.5″-10.5″ WC |
| Propane Gas Supply Pressure (from source) |
8″-13″ WC |
| Natural Gas Manifold Pressure (min to max) |
-0.04″ WC to -0.84″ WC |
| Propane Gas Manifold Pressure(min to max) |
-0.03″ WC to -0.50″ WC |
| Minimum Flow Rate |
0.5GPM(1.9L/M), <0.01GPM(0.04L/M) option for “A”models * |
| Connection Sizes |
Cold Water Inlet |
3/4″ NPT |
| Hot Water Outlet |
3/4″ NPT |
| Recirculation Inlet |
3/4″ NPT |
| Gas Inlet |
3/4″ NPT (Suitable for use with 1/2″ rigid gas pipe; refer to installation manual for sizing criteria) |
| Power Supply |
Main Supply |
120 V 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 Exchanger: Stainless Steel Secondary Heat Exchanger: 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 |
APS, Ignition Operation Detector, Water Temperature High Limit Switch, Exhaust Temperature High Limit Sensor, Power Surge Fuse |
*Available for “A” models configured in an optional ComfortFlow recirculation mode. Additional energy use will occur when using recirculation.
