Navien NFB‑C Series User Manual

11About the Boiler
1.5 Dimensions
The following diagrams show the dimensions of the boiler and the table lists the supply connections.
32.8" (835 mm)
Supply Connections
Description
Diameter
NFB-301C NFB-399C
A Air Intake 3 in
B Exhaust Gas Vent 3 in
C
PRV-Air Vent Connection
(Optional Heating Supply)
1
1
/
4
in 1
1
/ in
D Optional Heating Return 1
1
/
4
in 1
1
/ in
E Heating Supply 1
1
/
4
in 1
1
/ in
F Condensate Outlet
3
/
4
in
G Heating Return 1
1
/
4
in 1
1
/ in
H Gas Connection
3
/
4
in
Overhead View
A
B
C
D
4.9” (125 mm)
7.5” (191.3 mm) 10.7” (271 mm)
16.3” (412.6 mm)
25.2" (640 mm)
A
B
C
D
4.8” (122 mm)
7.2” (184 mm) 10.6” (271 mm)
16.5" (420 mm)
25.1“ (640 mm)
<NFB-301C> <NFB-399C>

Navien NFB‑C Series Specifications

General

Brand	Navien
Model	NFB‑C Series
Category	Boiler
Language	English