SYSTEM OPERATION
17
Alternate Horizontal Vent Termination (Dual Pipe)
12" M
IN BE
TWEE
N
INTA
KE A
ND V
ENT
VENT
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3” - 24”
Figure 14
Combustion Air Intake may also be snorkeled to obtain 12” min ground clearance.
Alternate Vent Termination Above Anticipated Snow Level
(Dual Pipe)
12" M
IN BE
TWEE
N
INTA
KE A
ND V
ENT
VENT
90°
ELBOWS
12" MIN. ABOVE
HIGHEST ANTICIPATED
SNOW LEVEL
3”-24” BETWEEN PIPES
Figure 15
If the combustion air intake pipe is to be installed above a
finished ceiling or other area where dripping of condensate
will be objectionable, insulation of the combustion air pipe
may be required. Use 1/2” thick closed cell foam insulation
such as Armaflex™ or Insultube™ where required.
