UTICA BOILERS UCS-240 Installation, Operation & Maintenance Manual page 31

FIGURE 6-20 Flue on Roof, Indoor Combustion Air
Vent
Combustion
Air
FIGURE 6-21 Flue on Sidewall, Inside Combustion Air
Combustion
Air
6 - COMBUSTION AIR AND VENT PIPING
Maintain 12"(305mm) US
(18"(457mm) Canada)
minimum clearance above
highest anticipated snow level
maximum 24" (610mm) above
roof
24" (610mm)
* Minimum Length
18" Vertical
Clearance to
ventilated soffit
Vent
Maintain
12"(305mm) US
(18"(457mm)
Canada) clearance
above highest
anticipated snow
line
Snow line
Ground Level
Combustion air and Vent Piping Length Page 26.
Combustion air and Vent Piping Length Page 25.
Configurations of single pipe vent with flue on
sidewall, requires tee as vent terminal. See figures
6-21 and 6-23.
31
NOTICE
P/N 240011654, Rev. C [06/08/2017]