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NPE-240S2 premium features and benefits
2″ PVC venting up to 75 feet
Low exhaust gas temperatures allow use of PVC (including schedule 40 PVC), CPVC, polypropylene (rigid and flexible) and stainless steel venting saving time and costs.Vent Installation Detector (VID) for added safety.
Dual Venturi for field gas conversions. Dual Venturi system creates better combustion control and turndown ratio.
ComfortFlow® NPE-A2 built-in recirculation system
The patented ComfortFlow® system is the first to include a buffer tank, recirculation pump and fine-tuned controls into a tankless water heater.
Dual stainless steel heat exchangers for added durability.
EZNav™ Multi-line control with built-in intuitive software.
|Heat Capacity (input)||Natural gas||13,300 – 199,900 BTU/h|
|Propane||13,300 – 199,900 BTU/h|
|Efficiency ratings||UEF (NG & LP)||0.96|
|Flow rate (DHW)||19°C temp rise||42.4 l/m (11.2 GPM)|
|25°C temp rise||32.9 l/m (8.7 GPM)|
|37°C temp rise||22 l/m (5.8 GPM)|
|Dimensions||43.9cm W x 69.6cm H x 33.5cm D (17.3″ W x 27.4″ H x 13.2″ D)|
|Boiler weight||33.1 kg (73 lbs)|
|Installation type||Indoor or outdoor wall-hung|
|Venting type||Forced draft direct-vent|
|Water pressure||1.055-10.545 kg/cm2 (15-150 PSI)|
|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 rate||1.893 l/m (0.5 GPM)|
|Connection sizes||Cold water inlet||3/4″ NPT|
|Hot water outlet size||3/4″ NPT|
|Gas inlet||3/4″ NPT|
|Power supply||Main supply||120V AC, 60 Hz|
|Maximum power consumption||200 W (max 2 A), 350 W (max 4 A) with external pump connected|
|Materials||Casing||Cold rolled carbon steel|
|Heat exchangers||Primary heat exchanger: stainless steel Secondary heat exchanger: stainless steel|
|Venting||Exhaust||2″ or 3″ PVC, CPVC, approved polypropylene and stainless steel 2″ or 3″ special gas vent type BH (Class II, A /B/C)|
|Intake||2″ or 3″ PVC, CPVC, approved polypropylene and stainless steel 2″ or 3″ special gas vent type BH (Class II, A /B/C)|
|Vent clearances||0″ to combustibles|
|High elevations||10,100 feet for both NG or LP gas. Please refer to Installation Manual for additional details and instructions.|
|Safety Devices||Flame 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)|
*Available for NPE-A2 models configured in an optional ComfortFlow® recirculation mode. Energy consumption will increase when the system is configured for recirculation.Navien reserves the right to change specifications at any time without prior notice.