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1.3 Specifications
The following tables list the specifications for the boiler. Additional specifications for water, gas, electricity, and
vent connections are provided in the Installation section.
Space Heating Specifications
Heating Input (MBH)
Model
Number
1
Min
NHB-055H
8
NHB-080H
8
NHB-110H
10
NHB-150H
10
1. Ratings are the same for natural gas models converted to propane use.
Note
2. Based on U.S. Department of Energy (DOE) test procedures.
3. The net AHRI water ratings shown are based on a piping and pickup allowance of 1.15. Consult
Navien before selecting a boiler for installations having unusual piping and pickup requirements,
such as intermittent system operation, extensive piping system, etc.
6
About the Boiler
Navien Condensing Boiler
Space Heating Ratings
Heating
Capacity
2
Max
(MBH)
55
51
80
73
110
101
150
136
Net AHRI
Rating Water
AFUE
(%)
3
2
(MBH)
44
95
64
95
88
95
118
95
Other Specifications
Water
Water
Connection Size
Pressure
(Supply, Return)
12–30 psi
1 in NPT
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