HIGH EFFICIENCY CONDENSING TANKLESS WATER HEATER
- ½ gas pipe capable 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 60'
- Cascading capable
Navien NPE-180A, Condensing Tankless Water Heater
- * Available for “A” models configured in an optional ComfortFlow recirculation mode. Additional energy use will occur when using recirculation. 
 * Navien reserves the right to change specifications at any time without prior notice.
- Item - NPE-180A - Heat Capacity (input) - 15,000 - 150,000 BTU/H (4.395 - 43.95 kWh) - Efficiency Ratings - 0.96 - Dimensions - 17.3" W x 27.4" H x 13.2" D (43.9cm W x 69.6cm H x 33.5cm D) - Boiler weight - 75 lbs (34 kg) - Installation Type - Indoor or outdoor wall-hung - Venting Type - Forced draft direct vent - Ignition - Electronic ignition - Water pressure - 15 - 150 PSI (1.055 - 10.545 kg/cm2) - Natural gas supply pressure (from source) - 3.5 " WC - 10.5 " WC (0.87 Kpa - 2.61 Kpa) - Propane gas supply pressure (from source) - 8 " WC - 13 " WC (1.99 Kpa - 3.23 Kpa) - Natural gas manifold pressure (min-max) - -0.04 " WC - -0.84 " WC (-0.0099 Kpa - -0.21 Kpa) - Propane gas manifold pressure (min-max) - -0.05 " WC - -0.5 " WC (-0.012 Kpa - -0.12 Kpa) - Minimum flow rate - 0.5 GPM (1.893 l/m) - Connection sizes - 3/4" - Power supply - 120V AC, 60Hz - Maximum power consumption - 200W (max 2A), 350W (max 4A) with external pump connected - Casing - Cold rolled carbon steel - Venting - 2" or 3" PVC, CPVC, polypropylene / 2" or 3" special gas vent type BH (Class II, A/B/C) - Vent clearances - 0" to combustibles - Safety Devices - Flame rod, APS, ignition operation detector, water temperature high limit switch,exhaust temperature high limit sensor, power surge fuse 













