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17.3" W x 27.4" H x 13.2" D (43.9cm W x 69.6cm H x 33.5cm D)
Product approvals
- CSA
- Yes
- NSF(Standard 5)
- Yes
- Low Lead(<0.25%)
- Yes
- SCAQMD 1146.2(NOx, <20ppm)
- Yes
- AHRI Number
- 6678382
- Energy star certified
- Yes
Efficiency Ratings*
- Uniform Energy Factor(UEF)
- 0.96
- MAX GPM(67°F Rise)
- 5.6 GPM (21.2 l/m)
Annual Energy Consumption* (Residential)
- Natural gas(Therms/Year)
- 175.0
- Propane(Gallons/Year)
- 193 gal (730.6 l)
- Natural Gas Estimated Operating Cost**
- $191
- Propane Estimated Operating Cost**
- $465
*Based on U.S. Department of Energy (DOE) test procedures.
**Based on a national average natural gas cost of $1.09/therm, propane cost of $2.41/gallon.
| Temp Rise | NPE-240A |
|---|---|
| 30°F | 11.2 GPM (42.4 l/m) |
| 35°F | 11.2 GPM (42.4 l/m) |
| 40°F | 9.8 GPM (37.1 l/m) |
| 45°F | 8.7 GPM (32.9 l/m) |
| 50°F | 7.8 GPM (29.5 l/m) |
| 55°F | 7.1 GPM (26.9 l/m) |
| 60°F | 6.5 GPM (24.6 l/m) |
| 65°F | 6 GPM (22.7 l/m) |
| 70°F | 5.6 GPM (21.2 l/m) |
| 75°F | 5.2 GPM (19.7 l/m) |
| 80°F | 4.9 GPM (18.5 l/m) |
| 85°F | 4.6 GPM (17.4 l/m) |
| 90°F | 4.4 GPM (16.7 l/m) |
| 100°F | 3.9 GPM (14.8 l/m) |
| 110°F | 3.6 GPM (13.6 l/m) |
| 120°F | 3.3 GPM (12.5 l/m) |
| 130°F | 3 GPM (11.4 l/m) |
| 140°F | 2.8 GPM (10.6 l/m) |
| Model | NPE-240A |
|---|---|
| Natural gas | 19,900 - 199,900 BTU/h (5.831 - 58.571 kWh) |
| Propane | 19,900 - 199,900 BTU/h (5.831 - 58.571 kWh) |
Lower HERS home index score
U.S. Green Building Council LEED Points
| Water Heater | 1 Point |
|---|---|
| Location | 2 Points |
| Recirculation | 3 Points |
| Item | NPE-240A | |
|---|---|---|
| Heat Capacity (input) | Natural gas | 19,900 - 199,900 BTU/h (5.831 - 58.571 kWh) |
| Propane | 19,900 - 199,900 BTU/h (5.831 - 58.571 kWh) | |
| Efficiency ratings | UEF (NG & LP) | 0.96 |
| Flow rate (DHW) | 35°F temp rise | 11.2 GPM (42.4 l/m) |
| 45°F temp rise | 8.7 GPM (32.9 l/m) | |
| 67°F temp rise | 5.6 GPM (21.2 l/m) | |
| Dimensions | 17.3" W x 27.4" H x 13.2" D (43.9cm W x 69.6cm H x 33.5cm D) | |
| Boiler weight | 82 lbs (37.2 kg) | |
| Installation type | Indoor or outdoor wall-hung | |
| Venting type | Forced draft direct vent | |
| Ignition | Electronic ignition | |
| Water pressure | 15-150 PSI (1.055-10.545 kg/cm2) | |
| Natural gas supply pressure (from source) | 3.5 " WC to 10.5 " WC (0.87 Kpa to 2.61 Kpa) | |
| Propane gas supply pressure (from source) | 8 " WC to 13 " WC (1.99 Kpa to 3.23 Kpa) | |
| Natural gas manifold pressure (min-max) | -0.05 " WC to -0.58 " WC (-0.012 Kpa to -0.14 Kpa) | |
| Propane gas manifold pressure (min-max) | -0.1 " WC to -0.78 " WC (-0.025 Kpa to -0.19 Kpa) | |
| Minimum flow rate | 0.5 GPM (1.893 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 | |
*Available for “A” models configured in an optional ComfortFlow recirculation mode. Additional energy use will occur when using recirculation.
Navien reserves the right to change specifications at any time without prior notice.