Navien NHB Series User Manual

12 About the Boiler
Supply Connections
E G
HF
12.7” (320.7 mm)
4” (102.3 mm)
18.9” (480.6 mm)
21” (534.2 mm)
22.4” (568 mm)
14.3” (364.4 mm)
8.5”
(217 mm)
25.2” (640 mm)
3.1”
(78.5 mm)
16.7”
(423.1 mm)
14.3” (362.1 mm)
E G
HF
16.5” (420 mm)
3.2” (81 mm)
18.4” (468 mm)
22” (560 mm)
22.3” (566 mm)
17.2” (436 mm)
2.9 ”
(75 mm)
6.3”
(161 mm)
11.8” (301 mm)
5.3”
(136 mm)
25” (638 mm)
<NFB-301C> <NFB-399C>

Navien NHB Series Specifications

General

Type	Condensing Boiler
Efficiency	Up to 95% AFUE
Fuel Type	Natural Gas or Propane
Vent Type	Direct Vent
Vent Diameter	2" or 3"
Heat Exchanger Material	Stainless Steel
Water Connections	3/4" NPT
Dimensions	Varies by model
Weight	Varies by model
Warranty	5-Year Parts