High-Efficiency Navien Gas Boiler NFB-175H 175,000 BTU

Technical Characteristics of Navien NFB-175H Boiler

• Heating Input
  • Min
  • Max
  • 13,300 BTU/h (3.9 kWh)
  • 175,000 BTU/h (51.3 kWh)
• Heating Capacity
  • 160,000 BTU/h (46.9 kWh)
• Net AHRI Rating, Water
  • 140,000 BTU/h (41 kWh)
• AFUE
  • 95.0
• Water Pressure
  • Min
  • Max
  • 6 PSI (0.4 kg/cm2)
  • 80 PSI (5.6 kg/cm2)
• Water Connection Size (Supply, Return)
  • 1-1/4″ NPT
• Water volume
  • 4.5 gal (17 l)
• Dimensions
  • 17.3″ W x 27.6″ H x 17.3″ D (43.9cm W x 70.1cm H x 43.9cm D)
• Boiler weight
  • 121 lbs (54.9 kg)
• Installation type
  • Indoor wall-hung
• Max Vent Length
  • 0 ft ( m)
• Ignition
  • Electronic ignition
• 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)
  • -0.03 ” WC to -0.7 ” WC (-0.0075 Kpa to -0.17 Kpa)
• Propane gas manifold pressure (min-max)
  • -0.02 ” WC to -0.68 ” WC (-0.005 Kpa to -0.17 Kpa)
• Connection sizes
  • Gas inlet
  • 3/4″ NPT
• Power supply
  • Main supply
  • Maximum power consumption
  • 120V AC, 60Hz
  • Less than 15 amperes
• Materials
  • Casing
  • Heat exchangers
  • Cold-rolled carbon steel
  • Stainless steel
• Venting
  • Exhaust
  • Intake
  • Vent clearances
  • 2″ or 3″ PVC, CPVC, approved polypropylene 2″ or 3″ special gas vent type BH (Class III, A/B/C) 2″ or 3″ stainless steel
  • 2″ or 3″ PVC, CPVC, polypropylene 2″ or 3″ special gas vent type BH (Class III, A/B/C) 2″ or 3″ stainless steel
  • 0″ to combustibles
• Safety Devices
  • Flame rod, APS, ignition operation detector, water temperature high limit switch, exhaust temperature high limit sensor, water pressure sensor