NAVIEN NPE180S2-NG TANKLESS WATER HEATER 150K BTU NO PUMP (NPE-S)

Navien NPE-180S2-NG Tankless Water Heater – 150K BTU, Ultra Efficient

Upgrade your home’s hot water system with the Navien NPE-180S2-NG Condensing Tankless Water Heater. This high-performance, space-saving unit delivers endless hot water on demand while reducing energy consumption. With a heating capacity of 150,000 BTU and ultra-condensing technology, it’s ideal for residential or light commercial applications.

Key Features

• High Heating Capacity: 150,000 BTU ensures consistent hot water even during peak usage.
• Ultra-Efficient: 0.96 UEF rating with stainless steel dual heat exchangers.
• Space-Saving Design: Wall-mounted unit frees up floor space.
• Quiet Operation: Engineered to operate with minimal noise.
• Gas Type: Compatible with Natural Gas or Propane (field convertible).
• Venting: Supports 2" or 3" PVC, CPVC, polypropylene, or stainless steel.

Performance

• Flow Rate @ 35°F Rise: 8.4 GPM
• Flow Rate @ 45°F Rise: 6.5 GPM
• Flow Rate @ 67°F Rise: 4.3 GPM
• Minimum Activation Flow: 0.5 GPM

Installation & Specs

• Installation: Indoor or outdoor wall-hung
• Dimensions: 17.3" W x 27.4" H x 13.2" D
• Weight: 68 lbs (30.8 kg)
• Water Pressure: 15–150 PSI
• Elevation Certified: Up to 10,100 ft

Gas Pressure Ratings

• Natural Gas Input: 10,000 – 150,000 BTU/h
• Propane Input: 10,000 – 150,000 BTU/h
• NG Supply Pressure: 3.5"–10.5" WC
• LP Supply Pressure: 8"–13" WC
• Manifold Pressure (NG): –0.03" to –0.55" WC
• Manifold Pressure (LP): –0.02" to –0.55" WC

Connections

• Cold Water Inlet: 3/4" NPT
• Hot Water Outlet: 3/4" NPT
• Gas Inlet: 3/4" NPT

Power & Electrical

• 120V AC, 60Hz
• Max Consumption: 200W (350W w/ external pump)

Safety Features

• Flame rod detection
• APS (Air Pressure Switch)
• Water & exhaust temp limit switches
• Power surge and burner high-limit fuses
• Vent installation detector (VID)

What’s Included

• (1) NPE-180S2 Tankless Water Heater
• (1) Conversion Kit (NG to LP)
• (1) Wall Mount Bracket
• (4) Tapping Screws & Anchors
• (2) 2" Vent Termination Caps
• (4) 2" Wall Flanges

Whether you're installing it in a home or a light commercial setting, the Navien NPE-180S2 offers quiet, energy-efficient operation and a constant supply of hot water—without the bulk of a tank.