IBC DC Series - “Direct Vent” Combustion Air Intake Piping; Vent Terminal Clearance; Distance Inside; Outside Minimums

INSTALLATION AND OPERATION INSTRUCTIONS
1-14
DC SERIES BOILERS / WATER HEATERS DC 15-95, DC 15-96, DC 20-125, DC 33-160
Figure 14B: Distance Inside / outside minimums
1.4.7 “Direct Vent” Combustion Air Intake Piping
The boiler / water heater must always be installed as a Direct Vent venting
system with the combustion air piped directly from the outdoors to the boilers
/ water heaters combustion air connection. Provisions for combustion and
ventilation air in accordance with the section “Air for Combustion and Ventilation,”
of the National Fuel Gas Code, ANSI Z223.1/NFPA 54, or Clause 8.2, 8.3 or 8.4
of Natural Gas and Propane Installation Code, CAN/CSA B149.1, or applicable
provisions of the local building codes.
V
V
V
V
V
V
V
V
V
X
X
F
C
B
D
E
B
K
M
G
A
INSIDE
CORNER DETAIL
H
FIXED
CLOSED
OPERABLE
OPERABLE
CLOSED
FIXED
B
J
A
B
B
B
V VENT TERMINAL X AIR SUPPLY INLET AREA WHERE TERMINAL IS NOT PERMITTED
I
L
Figure 14A: Vent Terminal Clearance