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Navien NPE 180S2 Tankless Water Heater Information

​The BETTER Way To Heat Water

  • Contains Longer Lifespan

  • Never-Ending Hot Water

  • Includes Better Warranty

  • Won't Cause Flooding

  • Saves Space

  • Saves Money Over Time

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HIGH EFFICIENCY CONDENSING TANKLESS WATER HEATER

NPE-180S2

Navien NPE 180S2 Tankless Water Heater Information

Specifications

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Heat Capacity (input)

  • Natural gas 10,000 - 150,000 BTU/h

Propane

  • 10,000 - 150,000 BTU/h

Efficiency Ratings

  • UEF (NG & LP) 0.96

Flow Rate (DHW)

  • 35°F temp rise 8.4 GPM (31.8 l/m)

  • 45°F temp rise 6.5 GPM (24.6 l/m)

  • 67°F temp rise 4.3 GPM (16.3 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

  • 68 lbs (30.8 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

Propane gas supply pressure (from source) 8 " WC to 13 " WC

Natural gas manifold pressure (min-max) -0.03 " WC to -0.55 " WC

Propane gas manifold pressure (min-max) -0.02 " WC to -0.55 " WC

Minimum Flow Rate

  • 0.5 GPM (1.893 l/m)

Connection Sizes

  • Cold water inlet 3/4" NPT

  • Hot water outlet size 3/4" NPT

  • Gas inlet 3/4" NPT

Power Supply

  • Main supply 120V AC, 60 Hz

Maximum Power Consumption

  • 200 W (max 2 A), 350 W (max 4 A) with external pump connected

Materials Casing

  • Cold-rolled carbon steel

Heat Exchangers

  • Primary heat exchanger: stainless steel

  • Secondary heat exchanger: stainless steel

Venting

  • Exhaust2" or 3" PVC, CPVC, approved polypropylene and stainless steel 2" or 3" special gas vent type BH (Class II, A /B/C)

  • Intake2" or 3" PVC, CPVC, approved polypropylene and stainless steel 2" or 3" special gas vent type BH (Class II, A /B/C)

Vent Clearances

  • 0" to combustibles

High Elevations

  • 10,100 feet for both NG or LP gas. Please refer to Installation Manual for additional details and instructions.

Safety Devices

  • Flame rod, APS, ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor, power surge fuse, burner high limit fuse, vent installation detector (VID)

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