The Leader in Condensing Technology
H2Air
Combination heating system
An add-on accessory for the Navien
NPE-A Series tankless water heater that
creates a high efficiency space heating
and endless domestic hot water system
T H E
L E A D E R
I N
C O N D E N S I N G
T E C H N O L O G Y
H2Air
Shower
Hot air supply
Thermostat
Outdoor sensor
Combination
heating and
DHW system
Designed for both retrofit and new
construction residential applications,
Navien’s H2Air Kit* allows for
space heating and DHW system integration
between NPE-A Series tankless water heater models
and a hydronic air handler. With H2Air you will have
a combination appliance that can provide endless domestic
hot water and continuous space heating when sized correctly.
H2Air is compatible with hydronic air handler models that
require W1/W2/R terminals along with single or dual-stage
thermostats†. The included Outdoor Reset Sensor provides
optimum performance and efficiency for space heating.
H2Air
control
AHU
integrated
circulator
pump
Cold
air
return
Integrated
control
panel
Power
H2 Air Kit
includes
•Domestic hot water priority
or simultaneous Domestic
hot water and heating‡
•Controller
•Endless supply of DHW
•Adjustable outdoor
temperature reset and
heating set points
Shower
valve
1/2" gas line
Hydronic
air handler
Check
valve
Expansion tank
Note: H2 Air is for use with one NPE-A and one AHU only. For detailed information, refer to the
AHU manufacturer’s literature to determine the proper output capacity.
Additional
features
NPE-A
condensing
tankless
water heater
Thermostatic
mixing valve
Hot water supply
DHW supply
Warm water return
•13-pin connector cable
Cold water supply
Flow
switch
2013
Navien NPE-A
Wins 2013 AHR
Innovation Award
•Outdoor temperature sensor
•Flow switch for domestic hot water
Blower fan
•Adjustable pump
purge timer
PNBD-000001
*Compatible with NPE-A Series units produced on or after May 31, 2014.
†
Self-powered thermostats only.
‡
The control will automatically pause heating if the simultaneous DHW
and heating loads exceed 85% of the water heater’s capacity to ensure
an uninterrupted supply of domestic hot water.
A new use for the NPE-A’s integrated circulator
The H2Air Kit utilizes the NPE-A pump to circulate the hot water for the
hydronic air handler. This removes the need to purchase an additional
circulator for the heating system.
1
2
GAS
UP TO
NPE-A is easy to sell, easy to install
2”PVC
UP TO
Cuts installation time in half
Thanks to using ½" gas pipe and 2" PVC venting, you can install a
Navien tankless water heater in about half the time as competitive
tankless heaters — about the same time as a traditional tank heater.
Fewer callbacks, longer life, faster heating
Navien was first to offer dual stainless steel heat exchangers, rather
than copper, which extends the life by resisting corrosion.
Energy Star highly rated gas water heater
The NPE-A is one of the most energy efficient tankless water heater
series in the industry. Our ultra condensing technology delivers
cooled exhaust gas and high performance up to 0.96UEF/ 0.97EF.
CAPABILITY
24 FT
VENTING
60 FT
STAINLESS
DUAL
STEEL
HEAT EXCHANGERS
NG LP FIELDCONVERTIBLEGAS
OR
UP TO
0.97EF
UP TO
0.96
U
E
F
The Leader in Condensing Technology
T H E
L E A D E R
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T E C H N O L O G Y
Dimensions
0.4" (10mm)
A
B
Item
14.3" (364mm)
3" (77mm)
4.5" (115mm)
Connection Size
Φ 2"
Φ 2"
27.4" (695mm)
28.8" (731mm)
C
D
G
E
2.4" (61mm)
2.4" (61mm)
F
2.3"
3.0"
(60mm) (77mm)
8.3"
(212mm)
17.3" (440mm)
Connection Size
C
D
E
F
G
Hot Water Outlet
Recirculation Inlet (A model)
Cold Water Inlet
Heat capacity
(input)
Efficiency
ratings
6.7" (170mm)
A Air Intake
B Exhaust Gas Vent
13.2" (336mm) (NPE-210A/240A)
12" (306mm) (NPE-180A)
TM
2.6" (67mm)
1.5" (38mm)
Specifications for NPE-A with H2Air
Φ 3/4"
Φ 3/4"
Φ 3/4"
Gas Inlet
Φ 3/4"
Condensate Outlet
Φ 1/2"
Flow rate
(DHW)
Natural gas
Propane gas
UEF (NG & LP)
EF (Canada NG & LP)
35°F (19°C) temp rise
45°F (25°C) temp rise
67°F (36°C) temp rise
Dimensions
Weight
Installation type
Venting type
Ignition
Water pressure
Natural gas supply pressure (from source)
Propane gas supply pressure (from source)
Natural gas manifold pressure (min-max)
Propane gas manifold pressure (min-max)
Minimum flow rate
Cold water inlet
Connection sizes Hot water outlet
Gas inlet
Main supply
Power supply
Maximum power
consumption
Casing
Materials
Heat exchangers
Exhaust
Venting
Intake
Vent clearances
Safety devices
Model
NPE-210A
NPE-180A
NPE-240A
15,000–150,000 BTU/H
19,900–180,000 BTU/H
19,900–199,900 BTU/H
0.96
0.97
8.4 GPM (32 L/m)
6.5 GPM (25 L/m)
4.3 GPM (16 L/m)
17.3"W x 27.4"H x 13.2"D
75lbs (34kg)
Indoor or outdoor wall-hung
Forced draft direct vent
Electronic ignition
15–150 PSI
3.5"–10.5" WC
8"–13" WC
-0.04" WC to -0.84" WC
-0.05" WC to -0.50" WC
0.5 GPM (1.9 L/m)
3/4" NPT
3/4" NPT
3/4" NPT
120V AC, 60 Hz
0.96
0.97
10.1 GPM (38 L/m)
7.8 GPM (30 L/m)
5.0 GPM (19 L/m)
0.96
0.97
11.2 GPM (42 L/m)
8.7 GPM (33 L/m)
5.6 GPM (21 L/m)
82lbs (37kg)
82lbs (37kg)
-0.05" WC to -0.36" WC
-0.10" WC to -0.66" WC
-0.05" WC to -0.58" WC
-0.10" WC to -0.78" WC
200W (max 2A), 350W (max 4A) with external pump connected
Cold rolled carbon steel
Primary heat exchangers: stainless steel, secondary heat exchangers: stainless steel
2" or 3" PVC, CPVC, polypropylene / 2" or 3" special gas vent type BH (Class II, A/B/C)
2" or 3" PVC, CPVC, polypropylene / 2" or 3" special gas vent type BH (Class II, A/B/C)
0" to combustibles
Flame rod, APS, ignition operation detector, water temperature high limit switch,
exhaust temperature high limit sensor, power surge fuse
Navien reserves the right to change specifications at any time without prior notice. Please refer to www.navien.com to verify you have the most current information.
Note: H2 Air is for use with one NPE-A and one AHU only. For detailed information, refer to the AHU manufacturer’s literature to determine the proper output capacity.
Internal or external circulation modes typically available on the NPE-A models are no longer available when the H2 Air application is installed.
Accessories
H2Air Kit
AHU Optimizer
PNBD-000001
CSA P.9-11 rating
Combi System
Heat
Generator
Plumb Easy Valve 3/4"
with Relief Valve
30012581A
NPE-180A
Residential Neutralizer
(1 unit)
GXXX001322
Replacement Media
GXXX001323
NPE-A warranty
Commercial
Heat
Labor Parts
or Combi*
exchanger
Standard or controlled
1 year 5 years
8 years
recirculation
Uncontrolled
1 year 3 years
3 years
recirculation
*“Combi” refers to a combination potable water & space
heating application. Water heaters cannot be used in
space heating only applications.
NPE-240A
Fan Coil
SunTherm
Airmax
Airmax
Hi-Velocity Systems
Airmax
Hi-Velocity Systems
Ecologix Heating Technologies Inc.
Hi-Velocity Systems
Hi-Velocity Systems
Ecologix Heating Technologies Inc.
SunTherm
Hi-Velocity Systems
Hi-Velocity Systems
Airmax
ADP
Airmax
Airmax
Airmax
Model number
MMVE0S4NAAA
50e, 50e P2, 50e P3
70e
HE-Z 70/71H, HE-B 70/71H
50e, 50e P2, 50e P3
HE-Z 50/51H, HE-B 50/51H
EZPN40-EZ1
HE-Z 50/51H, HE-B 50/51H
HE-Z 70/71H, HE-B 70/71H
EZ1
MMVE0M4NAAA
HE-Z 100/101H, HE-B 100/101H
LV-Z 1050H
50e, 50e P2, 50e P3
MXV12WNN4C
50e, 50e P2, 50e P3
50e, 50e P2, 50e P3
50e, 50e P2, 50e P3
CSHE
(%)
WHPF
Recovery
Efficiency
(%)
TPF
94
92
93
91
90
90
90
84
84
95
95
93
93
92
91
90
88
87
0.96
0.94
0.94
0.96
0.94
0.96
0.96
0.96
0.96
0.95
0.95
0.96
0.96
0.94
0.95
0.94
0.94
0.94
97
97
97
98
97
98
97
98
98
96
96
98
98
96
96
96
96
96
0.94
0.93
0.93
0.92
0.91
0.90
0.90
0.86
0.86
0.95
0.95
0.94
0.93
0.92
0.92
0.90
0.89
0.88
Refer to Natural Resources Canada’s directory for additional combinations.
Navien Inc.
20 Goodyear, Irvine, CA 92618
800-519-8794, Navien.com
NPE-BR003-1601
©2016 Navien Inc.
The Leader in Condensing Technology
T H E
L E A D E R
I N
C O N D E N S I N G
T E C H N O L O G Y
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