6 About the Water Heater
2.3 Specifications
The following table lists the specifications for the water heater. Additional specifications about water, gas, electric, and air supplies (venting)
appear in the Installation section.
Item NPE-150S NPE-180A NPE-180S NPE-210A NPE-210S NPE-240A NPE-240S
Heat
Capacity
(Input)
Natural Gas
18,000-
120,000
BTU/H
15,000-150,000 BTU/H 19,900-180,000 BTU/H 19,900-199,900 BTU/H
Propane Gas 15,000-150,000 BTU/H 19,900-180,000 BTU/H 19,900-199,900 BTU/H
Efficiency
Ratings
UEF
(for NG & LP)
0.96 0.96 0.97 0.96 0.97 0.96 0.97
EF (Canada)
(for NG & LP)
0.97 0.97 0.99 0.97 0.99 0.97 0.99
Flow Rate
(DHW)
35 °F (19 °C) Temp Rise
6.8 GPM
(25.8 L/m)
8.4 GPM (32 L/m) 10.1 GPM (38 L/m) 11.2 GPM (42 L/m)
45 °F (25 °C) Temp Rise
5.3 GPM
(20 L/m)
6.5 GPM (25 L/m) 7.8 GPM (30 L/m) 8.7 GPM (33 L/m)
67 °F (36 °C) Temp Rise
3.2 GPM
(12 L/m)
4.3 GPM
(16 L/m)
4.2 GPM
(16 L/m)
5.0 GPM
(19 L/m)
5.2 GPM
(20 L/m)
5.6 GPM
(21 L/m)
5.7 GPM
(22 L/m)
Dimensions 17.3 in (W) x 27.4 in (H) x 13.2 in (D)
Weight
62 lbs
(28 kg)
75 lbs
(34 kg)
67 lbs
(30 kg)
82 lbs
(37 kg)
75 lbs
(34 kg)
82 lbs
(37 kg)
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
Natural Gas Supply Pressure
(from source)
3.5 in WC-10.5 in WC
Propane Gas Supply Pressure
(from source)
8 in WC-13 in WC
Natural Gas Manifold Pressure
(min-max)
-0.04 in WC -
-0.40 in WC
-0.04 in WC - -0.84 in WC -0.05 in WC - -0.36 in WC -0.05 in WC - -0.58 in WC
Propane Gas Manifold Pressure
(min-max)
-0.05 in WC -
-0.42 in WC
-0.05 in WC - -0.50 in WC -0.10 in WC - -0.66 in WC -0.10 in WC - -0.78 in WC
Minimum Flow Rate 0 GPM (0 L/m) for “A” models / 0.5 GPM (1.9 L/m) for “S” models
Connection
Sizes
Cold Water Inlet
3
/
4
in NPT
Hot Water Outlet
3
/
4
in NPT
Gas Inlet
3
/
4
in NPT
Power
Supply
Main Supply 120 V 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 in or 3 in PVC, CPVC, Polypropylene
2 in or 3 in Special Gas Vent Type BH (Class II, A/B/C)
Intake
2 in or 3 in PVC, CPVC, Polypropylene
2 in or 3 in Special Gas Vent Type BH (Class II, A/B/C)
Vent Clearances 0 in to combustibles
Safety
Devices
Flame Rod, APS, Ignition Operation Detector, Water Temperature High Limit Switch, Exhaust Temperature High Limit Sensor,
Power Surge Fuse
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