This addendum must only be used by a qualified heating installer/service technician. Read all instructions, including
the Ultra boiler manual and all other information shipped with the boiler, before installing. Perform steps in the order
given. Failure to comply could result in severe personal injury, death or substantial property damage.
Manual addendum — Venting
Gas-fired water boilers – Series 3
Featuring
Flexibility
Part number 550-100-103/1110
®
Contents
Venting & air — general. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Sidewall vent/air termination: 3” or 4” concentric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Vertical vent/air termination: 3” or 4” concentric . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Concentric vent/air termination assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
DIRECT VENT: Vertical vent / sidewall air . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Install vent/air piping — boiler to termination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
DIRECT EXHAUST venting — general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
DIRECT EXHAUST — Boiler room air openings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
DIRECT EXHAUST — Sidewall . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
DIRECT EXHAUST — Vertical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Supplementary instructions for:
Additional concentric vent/air termination kits, including s
IPEX System 636 in 3-inch and 4-inch sizes
(for information on IPEX, go to www.ipexinc.com)
Direct exhaust ventings (requires combustion air openings to boiler
room/building per this addendum).
Direct vent with s Roof exhaust and Sidewall air intake
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