Specifications - Navien NFB-175 Mode D'emploi

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
NFB-175 17.5
NFB-200 19.9
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.
Navien Condensing Boiler
Space Heating Ratings
Heating
Capacity
2
Max
(MBH)
175 161
199 183
Net AHRI
Rating Water AFUE (%)
3 2
(MBH)
140 95
159 95
Other Specifications
Water
Water Connection
Pressure Size (Supply,
Return)
12–80 psi 1 ¼ in NPT
About the Boiler 7