IBC EX 700

Do not use
bushing on EX
700 and EX 850
models
Flue gas exhaust to outdoors
(connection at rear of boiler)
Flue gas exhaust to outdoors
Combustion air from outdoors. "Direct
Vent" installation: check air intake
outside is clear of obstructions.
Combustion air from outdoors. Use reducing
coupling to transition from 4" connection to 6"
venting before first elbow.
Boiler supply
Boiler return
Figure 21 Direct vent combustion air intake Figure 22 Combustion air intake - side view
33
3.5.8 Direct vent combustion air intake piping