Engineering Documents

NPE‑A Series
Max Input: 150,000 - 199,900BTU/H
Indoor or outdoor wall-hung
Residential/Commercial
  • ½ gas pipe capable up to 24'
  • Field convertible gas system
  • Ultra condensing efficiency
  • Dual stainless steel heat exchanges
  • Low NOx emissions (20ppm)
  • SCH 40, 2" venting up to 60'
  • Cascading capable
NPE‑S Series
Max Input: 120,000 - 199,900BTU/H
Indoor or outdoor wall-hung
Residential/Commercial
  • ½ gas pipe capable up to 24'
  • Field convertible gas system
  • Ultra condensing efficiency
  • Dual stainless steel heat exchanges
  • Low NOx emissions (20ppm)
  • SCH 40, 2" venting up to 60'
  • Cascading capable
NCB‑E Series
Max Input: 60,000 - 199,900BTU/H
Indoor wall-hung
Residential
  • Super condensing efficiency
  • Dual stainless steel heat exchangers
  • SCH40, 2" PVC venting up to 60'
  • ½" Gas pipe up to 24'
  • Automatic water filling system
  • Integrated controls
NHB Series
Max Input: 55,000 - 150,000BTU/H
Indoor wall-hung
Residential/Commercial
  • Super condensing efficiency
  • Dual stainless steel heat exchangers
  • SCH40, 2" PVC venting up to 60'
  • ½" Gas pipe up to 40'
  • TDR up to [tdr]
  • Integrated controls
NCB Series
Max Input: 80,000 - 199,900BTU/H
Indoor wall-hung
Residential
  • Super condensing efficiency
  • Dual stainless steel heat exchangers
  • SCH40, 2" PVC venting up to 60'
  • ½" Gas pipe up to 24'
  • Automatic water filling system
  • Integrated controls
NFB Series
Max Input: 175,000 - 199,900BTU/H
Indoor wall-hung
Residential/Commercial
  • Super condensing efficiency
  • Patented compact stainless steel fire tube heat exchanger
  • PVC exhaust venting capable: 2" up to 60'; 3” up to 150’
  • ½" Gas pipe up to 24' (Subject to local code)
  • TDR 10:1
  • Advanced user interface and controls
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Product Serial number is 15-16 digits and can be found either on the right side of the box or the back of the front cover.
Navien, Inc. Technical Customer Service Department

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