Dimensions - Navien NHB Series Installation & Operation Manual

1.5 Dimensions

The following diagrams show the dimensions of the boiler and the table lists the supply connections.
Overhead View
A
7.5" (191.3 mm) 10.7" (271 mm)
D
16.3" (412.6 mm)
25.2" (640 mm)
<NFB-301C>
B
C
Supply Connections
Description
A Air Intake
B Exhaust Gas Vent
PRV-Air Vent Connection
C
(Optional Heating Supply)
D Optional Heating Return
E Heating Supply
F Condensate Outlet
G Heating Return
H Gas Connection
A
7.2" (184 mm) 10.6" (271 mm)
D
16.5" (420 mm)
<NFB-399C>
Diameter
NFB-301C NFB-399C
3 in
3 in
1 1
1 / in 1 /2 in
4
1 1 / in 1 1 /2 in
4
1 1 / in 1 1 /2 in
4
3
/ in
4
1 1
1 / in 1 /2 in
4
3
/ in
4
B
C
25.1" (640 mm)
About the Boiler 11