A.O. Smith 100 Series Installation And Operating Manual page 27

Attach
termination
elbow.
Debris
Screen
(Install into
Cover Plate
300 mm
Elbow)
(optional)
(12")
min.*
Ground
Level*
*Where snow cover is normal during winter,
ensure outlet is installed above the anticipated
snow level.
Figure 31. Side-Wall Vent Termination - Normal Snow Cover
Attach
Bracket
termination
elbow.
Debris
Screen
(Install into
Elbow)
300 mm
Vent Riser
(12")
Cover Plate
min.*
(optional)
Ground
Sealant
Level*
(under plate)
*Where snow cover is above normal during
winter, ensure outlet is installed above the
anticipated snow level.
Figure 32. Side-Wall Vent Termination - Above Normal Snow Cover
75 mm
(3") min.
A vent used in a special
venting system with
positive vent pressure and
passing through a roof
shall extend at least 18"
above the highest point
where it passes through
the roof surface and any
other obstruction witin a
horizontal distance of 450
mm (18"). A vertical
venting system must be
supported every 1.5 m (5').
Figure 33. Roof Vent Termination
150 mm
(6")
Sealant
Vent Pipe to be
sloped (down) toward
heater to prevent
water from collecting.
May require a
Sealant
condensate tee.
(under plate)
Equivalent Vent
Length
Measured from
this Position
Sealant
Vent Pipe to be
sloped (down) toward
heater to prevent
water from collecting.
May require a
condensate tee.
Attach
termination
elbow.
Debris Screen
(Install into
elbow.)
450 mm (18")
or above
anticipated
snow level.
Roof Line
27