Instructions / Assembly

®
System 1738 Installation Methods 5
8" MINIMUM
12" MAXIMUM
Insulation in
unconditioned
space
Reducer coupling
Insulation
Outside Wall
2" 90º Elbow
Top View
Typical Wall Termination
6" MAX
separation
Vent
Intake
Figure 4
Side View: Typical Wall Snorkel Termination
12" MAXIMUM
Side View
Typical Wall Termination Restricted Grade
Insulation in
unconditioned space
Reducer Coupling
Provide support for
intake and vent
lines every 5 feet
Unconditioned space
Outside wall
Insulation
8" MINIMUM
12" Above expected
snow accumulation
Vent
Intake
Figure 3
Top View: Typical Wall Snorkel Termination
Side Wall Terminations
Snorkel termination:
(a) The runs of intake and vent pipes for terminations
in general should be installed as close together as
possible. A sidewall penetration shall maintain a 6"
maximum separation (see Figure 3)
(b) For wall penetrations, the vent should be straight
out or elevated (see Figure 4).
(c) On wall terminations intake piping should point
straight down through the use of one 90
o
elbow.
(see Figure 4).
(d) The termination of the fresh air intake through the
wall should be such that the bottom of the 90
o
elbow must be at a level of at least 12 inches above
the expected height of snow accumulation (see
Figure 4).
(e) A reducer may be used on the vent termination to
increase the velocities of the exiting gases away
from the intake (see Figures 3 & 4). Do not direct
exhaust to window wells, alcoves or stairwells.
(f) The exit points of gas venting pipe must not be less
than 3 ft. from an opening into another building.