Navien NPE-180S2 High Efficiency Condensing Tankless Hot Water Heater

Navien NPE-180S2 High Efficiency Condensing Tankless Hot Water Heater

Regular price
Sale price
Unit price
Shipping calculated at checkout.

Tankless hot water heaters provide you with endless, on-demand hot water. This is the second to the smallest natural gas/liquid propane tankless hot water heater Navien has to offer. It can handle the hot water for houses with one and a half bathrooms. Typically, all hot water heaters we offer can be on the way to you within 1-2 business days.

General Information

  • Unit Type - Water Heater
  • Product Line - NPE Series
  • Unit Size - 150,000 BTU/H
  • Wifi Enabled With NaviLink
  • Remote Control Enabled

Product Details

  • ½ gas pipe capable up to 24'
  • Field convertible gas system
  • Ultra condensing efficiency
  • Dual stainless steel heat exchangers
  • Low NOx emissions (20ppm)
  • SCH 40, 2" venting up to 75'
  • Cascading capable
  • EZNav multi-line control panel
  • Built-in HotButton control panel
  • Common vent up to 12 units

Installation Dimensions

  • 17.3" W x 27.4" H x 13.2" D
  • Weight: 68 lbs
  • Indoor or outdoor wall hung
  • 2" exhaust & intake

Warranty Information

  • Standard Recirculation: 1-year labor, 5-year parts, 15-year heat exchangers
  • Uncontrolled Recirculation: 1-year labor, 3-year parts, 5-year heat exchangers
  • Call Navien's Technical Administration Department at (800) 519-8794. 


  • Energy Star - Yes
  • UEF: .96
  • AHRI Certified - Yes
  • AHRI Number: 206368360

Actual Cost Savings

  • Navien Tankless Operating Costs: $193 (over 22% energy savings over tanked hot water heater)
  • Other Tankless Operating Costs: $249 (over 29% more expensive to operate than Navien)
  • 50 Gallon Tank: $319 (almost 1.5x more costly to operate than Navien)

As of 2021, the NPE-180S2 replaces the NPE-180S.