Navien NPE-180S2 Tankless Water HeaterNavien NPE-240S2 Tankless Water Heater 199,000 BTU/h
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Technical Characteristics of Navien NPE-240S2 Tankless Water Heater
- Item
- NPE-240S2
- Heat Capacity (input)
- Natural gas
- Propane
- 13,300 – 199,900 BTU/h
- 13,300 – 199,900 BTU/h
- Efficiency ratings
- UEF (NG & LP)
- 0.96
- Flow rate (DHW)
- 19°C temp rise
- 25°C temp rise
- 37°C temp rise
- 42.4 l/m (11.2 GPM)
- 32.9 l/m (8.7 GPM)
- 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
- Max Vent Length
- m (0 ft)
- Ignition
- Electronic ignition
- 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
- Hot water outlet size
- Gas inlet
- 3/4″ NPT
- 3/4″ NPT
- 3/4″ NPT
- Power supply
- Main supply
- Maximum power consumption
- 120V AC, 60 Hz
- 200 W (max 2 A), 350 W (max 4 A) with external pump connected
- Materials
- Casing
- Heat exchangers
- Cold rolled carbon steel
- Primary heat exchanger: stainless steel Secondary heat exchanger: stainless steel
- Venting
- Exhaust
- Intake
- Vent clearances
- 2″ or 3″ PVC, CPVC, approved polypropylene and stainless steel 2″ or 3″ special gas vent type BH (Class II, A /B/C)
- 2″ or 3″ PVC, CPVC, approved polypropylene and stainless steel 2″ or 3″ special gas vent type BH (Class II, A /B/C)
- 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)

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Navien NPE-240S2 Tankless Water Heater Manual
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Tankless Water Heater Navien NPE-240S2 Reviews
- Rachel Baker February 12, 2024
(0 reply)
4 of 1 ReviewsExcellent value for money. This water heater has been a real lifesaver for our family.