Navien NPE240S2 199000 btu/hr Residential Tankless Water Heater

In stock

NPE-240S2 premium features and benefits

  • Dual Venturi for field gas conversions. A dual Venturi system creates better combustion control and turndown ratio.
  • Dual stainless steel heat exchangers for added durability.
  • EZNav Multi-line control with built-in intuitive software.
  • ½” gas pipe capable of 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
  • PLEASE NOTE: In order to purchase this product, we would need assurance this product will be installed by a Licensed Technician for safety purposes. Details would be required before shipping to make sure the Technician/Company is registered to install this Product. Thanks for your cooperation.


Contact Us for Price at 289-999-2334 or



Heat Capacity (input)Natural gas13,300 – 199,900 BTU/h
Propane13,300 – 199,900 BTU/h
Efficiency ratingsUEF (NG & LP)0.96
Flow rate (DHW)35°F temp rise11.2 GPM (42.4 l/m)
45°F temp rise8.7 GPM (32.9 l/m)
67°F temp rise5.8 GPM (22 l/m)
Dimensions17.3″ W x 27.4″ H x 13.2″ D (43.9cm W x 69.6cm H x 33.5cm D)
Boiler weight73 lbs (33.1 kg)
Installation typeIndoor or outdoor wall-hung
Venting typeForced draft direct-vent
IgnitionElectronic ignition
Water pressure15-150 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 -0.96 ” WC
Propane gas manifold pressure (min-max)-0.02 ” WC to -0.96 ” WC
Minimum flow rate0.5 GPM (1.893 l/m)
Connection sizesCold water inlet3/4″ NPT
Hot water outlet size3/4″ NPT
Gas inlet3/4″ NPT
Power supplyMain supply120V AC, 60 Hz
Maximum power consumption200 W (max 2 A), 350 W (max 4 A) with external pump connected
MaterialsCasingCold rolled carbon steel
Heat exchangersPrimary heat exchanger: stainless steel Secondary heat exchanger: stainless steel
VentingExhaust2″ 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 clearances0″ to combustibles
High elevations10,100 feet for both NG and LP gas. Please refer to Installation Manual for additional details and instructions.
Safety DevicesFlame 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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