NPE-180S2 from Ontario Soft Water

NAVIEN NPE-180S2 CONDENSING TANKLESS WATER HEATER 

• 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 60′
• Cascading capable

Installation charges extra. Please CONTACT US  for a quote and home inspection. 

17.3″ W x 27.4″ H x 13.2″ D (43.9cm W x 69.6cm H x 33.5cm D)

Certification Summary

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		NPE-180S2-NG	NPE-180S-LP
Product approvals	CSA	Yes	Yes
	NSF(Standard 5)	Yes	Yes
	Low Lead(<0.25%)	Yes	Yes
	SCAQMD 1146.2(NOx, <20ppm)	Yes	Yes
	AHRI Number	6478771	6478771
	Energy Star Certified	Yes	Yes
Efficiency Ratings*	Uniform Energy Factor(UEF)	0.97	0.97
	MAX GPM(67°F Rise)	4.2 GPM (15.9 l/m)	4.2 GPM (15.9 l/m)
Annual Energy Consumption* (Residential)	Natural gas(Therms/Year)	175.0
	Propane(Gallons/Year)		192 gal (726.8 l)
	Estimated Operating Cost**	$191	$463

*Based on U.S. Department of Energy (DOE) test procedures.

**Based on a national average natural gas cost of $1.09/therm, propane cost of $2.41/gallon.

Temperature Rise

Temp Rise (°F)	30°F	35°F	40°F	45°F	50°F	55°F	60°F	65°F	70°F	75°F	80°F	85°F	90°F	100°F	110°F	120°F	130°F	140°F
180 Series GPM	8.4	8.4	7.4	6.5	5.9	5.3	4.9	4.5	4.2	3.9	3.7	3.5	3.3	2.9	2.7	2.5	2.3	2.1

DHW Capacity

Model	NPE-180S
Natural gas	15,000 – 150,000 BTU/H (4.395 – 43.95 kWh)
Propane	15,000 – 150,000 BTU/H (4.395 – 43.95 kWh)

Operating Cost

Navien Tankless	175.0 therms $191*
Other Tankless	209 therms $228
50 Gallon Tank	269 therms $293

* Based on Energy Guide cost estimates using $1.09 per therm of natural gas. Cost is in US dollars.

HERS and LEED

Lower HERS home index score

U.S. Green Building Council LEED Points

Water Heater	1 Point
Location	2 Points
Recirculation	3 Points

Specifications

Item		NPE-180S
Heat Capacity (input)	Natural gas	15,000 – 150,000 BTU/H (4.395 – 43.95 kWh)
	Propane	15,000 – 150,000 BTU/H (4.395 – 43.95 kWh)
Efficiency Ratings	UEF (NG & LP)	0.97
Flow rate (DHW)	35°F temp rise	8.4 GPM (31.8 l/m)
	45°F temp rise	6.5 GPM (24.6 l/m)
	67°F temp rise	4.2 GPM (15.9 l/m)
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		67 lbs (30.4 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	Coldwater inlet	3/4″
	Hot Water Outlet Size	3/4″
	Gas inlet	3/4″
Power supply	Main supply	120V AC, 60Hz
	Maximum power consumption	200W (max 2A), 350W (max 4A) with external pump connected
Materials	Casing	Cold-rolled carbon steel
	Heat exchangers	Primary heat exchangers: stainless steel, secondary heat exchangers: stainless steel
Venting	Exhaust	2″ or 3″ PVC, CPVC, polypropylene / 2″ or 3″ special gas vent type BH (Class II, A/B/C)
	Intake	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