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NPE-240A2 High Efficiency Condensing Tankless Water Heater
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NPE-240A2 High Efficiency Condensing Tankless Water Heater

SKU NPE-240A2
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NPE-240A2 High Efficiency Condensing Tankless Water Heater
Product Details
MODEL: NPE-240A2
Brand: Navien
Weight: 78.00 lbs

Overview
  • 1/2" 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 75'
  • Cascading capable
  • EZNav multi-line control panel
  • Built-in HotButton control panel
  • Common vent up to 12 units

Specifications

Heat Capacity (Input) Natural Gas 13,300 – 199,900 BTU/h
(3.897 – 58.571 kWh)
Propane 13,300 – 199,900 BTU/h
(3.897 – 58.571 kWh)
Efficiency Ratings UEF (NG & LP) 0.95
Flow Rate (DHW) 35 ºF temp rise 11.2 GPM (42.4 l/min)
45 ºF temp rise 8.7 GPM (32.9 l/min)
67 ºF temp rise 5.6 GPM (21.2 l/min)
Dimensions 17.3" W x 27.4" H x 13.2" D
(43.9 cm W x 69.6 cm H x 33.5 cm D)
Boiler Weight 77 lbs (34.9 kg)
Installation Type Indoor or outdoor wall-hung
Ignition Electronic ignition
Water Pressure 15-150 PSI (1.055 – 10.545 kg/cm2))
Natural Gas Supply Pressure
(from source)
3.5" WC to 10.5" WC
(0.87 Kpa to 2.61 Kpa)
Propane Gas Supply Pressure
(from source)
8″ WC to 13″ WC
(1.99 Kpa to 3.23 Kpa)
Natural Gas Manifold Pressure
(min-max)
-0.03″ WC to -0.96″ WC
(-0.0075 Kpa to -0.24 Kpa)
Propane Gas Manifold Pressure
(min-max)
-0.2″ WC to -0.96″ WC
(-0.005 Kpa to -0.24 Kpa)
Minimum Flow Rate 0.5 GPM (1.893 l/m), <0.01 GPM (0.04 l/m) option*
Connection Sizes Cold Water Inlet 3/4"
Hot Water Outlet Size 3/4"
Gas Inlet 3/4"
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, ingnition 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.


Dimensions

Width 17.3" (43.9 cm)
Height 27.4" (69.6 cm)
Depth 13.2" (33.5 cm)

Connection Sizes

(A) Air intake 2"
(B) Exhaust Gas Vent 2"
(C) Hot Water Outlett 3/4"
(D) Gas Inlet 3/4"
(E) Recirculation Inlet 3/4"
(F) Condensate Outlet 1/2"
(G) Cold Water Inlet 3/4"


Certification Summary

All NPE-2 models are field convertible from NG to LP gas.

Product Approvals

CSA Yes
NSF (Standard 5) Yes
Low Lead (<0.25%) Yes
SCAQMD 1146.2 (NOx, <20ppm) Yes
AHRI Number 206368359
Energy Star Certified Yes

Efficiency Ratings*

Uniform Energy Factor (UEF) 0.95
MAX GPM (67 ºF Rise) 5.6 GPM (21.2 l/min)

Annual Energy Consumption* (Residential)

Natural Gas (Therms/Year) 179.0
Propane (Gallons/Year) 196 gal (741.9 L)
Natural Gas Estimated Operating Cost** $195
Propane Estimated Operating Cost** $472

* 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.


Certifications / Qualification



Temperature Rise

Temp Rise NPE-240A2
35 ºF (19.4 ºC) rate 11.2 GPM (42.4 l/m)
40 ºF (22.2 ºC) rate 9.8 GPM (37.1 l/m)
45 ºF (25 ºC) rate 8.7 GPM (32.9 l/m)
50 ºF (27.8 ºC) rate 7.8 GPM (29.5 l/m)
55 ºF (30.6 ºC) rate 7.1 GPM (26.9 l/m)
60 ºF (33.3 ºC) rate 6.5 GPM (24.6 l/m)
65 ºF (36.1 ºC) rate 6 GPM (22.7 l/m)
70 ºF (38.9 ºC) rate 5.6 GPM (21.2 l/m)
75 ºF (41.7 ºC) rate 5.2 GPM (19.7 l/m)
80 ºF (44.4 ºC) rate 4.9 GPM (18.5 l/m)
85 ºF (47.2 ºC) rate 4.6 GPM (17.4 l/m)
90 ºF (50 ºC) rate 4.4 GPM (16.7 l/m)
100 ºF (55.6 ºC) rate 3.9 GPM (14.8 l/m)
110 ºF (61.1 ºC) rate 3.6 GPM (13.6 l/m)
120 ºF (66.7 ºC) rate 3.3 GPM (12.5 l/m)
130 ºF (72.2 ºC) rate 3 GPM (11.4 l/m)
140 ºF (77.8 ºC) rate 2.8 GPM (10.6 l/m)

DHW Capacity

Model NPE-240A2
Natural Gas 13,300 – 199,900 BTU/h
(3.897 – 58.571 kWh)
Propane 13,300 – 199,900 BTU/h
(3.897 – 58.571 kWh)

Operating Cost

Navien Tankless 179.0 therms $195*
Other Tankless 228 therms $249
50 Gallon Tank 293 therms $319

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

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