Heatilator GCDC60 Installation & Operating Instructions Manual page 14

3) Two Elbows
Elbows used in rear-vented configurations
should be either a 90-deg elbow or a 45-deg
elbow. Starter elbows cannot be used in
any rear vented configuration. Figure 30
shows various venting configurations using
two elbows to terminate horizontally.
f i r e - p a r t s . c o m
Note:
Exterior wall thickness must be a
minimum of 4 in. to a maximum of 17-1/2 in.
14
CALIBER DIRECT VENT INSTALLATION INSTRUCTIONS
Starter elbows cannot be
used in any rear vented
configuration.
h = 1 ft h = 2 ft h
1 1
v h v h v
2 2
1 ft 4ft 1 ft 2 ft 1 ft
2 ft 6 ft 2 ft 4 ft 2 ft
3 ft 9 ft 3 ft 6 ft 3 ft
4 ft 11 ft 4ft 8 ft 4 ft
20 ft 11 ft 20 ft 8 ft 20 ft
max max max max max
Figure 30
Two Elbows
4)
Starter elbows cannot be
used in any rear vented
= 3 ft
configuration.
1
h
2
4 ft
5 ft
d. Installing the Interior Wall Shield
6 ft
Whenever a combustible wall is penetrated, the
8 ft
hole must be framed (as shown in Figure 32) to
8 ft
receive an interior wall shield (see Figure 33).
max
This shield maintains minimum clearances and
restricts cold air infiltration.
The termination cap height must meet all local
and national codes and not be easily blocked or
obstructed.
If the wall being penetrated is of noncombustible
materials, a 9 in. diameter hole is acceptable.
30803 Rev X
Three Elbows
Elbows used on rear-vented configurations
should be either a 90-deg elbow or a 45-deg
elbow. Starter elbows cannot be used in
any rear vented configuration.
Figure 31 shows various
configurations using three elbows to
terminate horizontally.
w
0 ft
0 ft
0 ft
0 ft
1 ft
1 ft
1 ft
1 ft
2 ft
2 ft
2 ft
2 ft
Figure 31 - Three Elbows
Figure 32
Exterior Wall Hole
venting
v (min) h + h
1 2
1 ft 5 ft
2 ft 7 ft
3 ft 7 ft
8 ft
4 ft
max
1 ft 3 ft
2 ft 4 ft
3 ft 4 ft
4 ft 6 ft
1 ft 2 ft
2 ft 3 ft
3 ft 3 ft
4 ft 4 ft
08/04